Purpose: Amendments to chapter 296-150C WAC, Commercial coaches; chapter 296-150F WAC, Factory-built housing and commercial structures; and chapter 296-150M WAC, Manufactured homes were adopted by the department on June 26, 1998. These amendments are a result of the rule review process mandated by Executive Order 97-02 and of the department's regulatory improvement goal of enacting and enforcing rules that are "necessary, fair, understandable and consistent." Many of the amendments clarify rule requirements. Several amendments bring the department into compliance with either chapter 43.22 RCW, the state electrical code, the state building code or reciprocal agreements with other states. Some amendments incorporate department policies into Washington Administrative Code. Other amendments eliminate duplication. Finally, a number of amendments incorporate rule sections inadvertently omitted when these three chapters were revised in 1996. At that time, the two existing FAS chapters (chapters 296-150A and 296-150B WAC) were rewritten into four chapters (chapters 296-150C, 296-150F, 296-150M and 296-150R WAC). It was during that rewriting process that certain rule sections, which were a part of chapters 296-150A and 296-150B WAC, were inadvertently dropped from chapters 296-150C, 296-150F and 296-150M WAC.

Chapter 296-150C WAC, Commercial coaches.

WAC 296-150C-0020 What definitions apply to this chapter? Amendments were adopted to add a note to clarify the compliance responsibilities of nonvendor and vendor units.

WAC 296-150C-0310 Who can approve design plans? Amendments were adopted to correct electrical code references and clarify who can approve design plans submitted under a reciprocal agreement.

WAC 296-150C-0320 What must I provide with my request for commercial coach design-plan approval by the department? Amendments were adopted to add subsection (7) to bring chapter 296-150C WAC into compliance with state electrical law, specifically WAC 296-46-140 Plan review for educational, institutional or health care facilities and other buildings.

WAC 296-150C-0410 When does my design plan expire? Amendments were adopted to delete subsection (5) because the time frame has elapsed.

WAC 296-150C-0460 What information must a manufacturer provide when a professional or firm does the design-plan approval? Amendments were adopted to add:

Subsection (7) to bring chapter 296-150C WAC into compliance with state electrical law.

Subsection (8) to comply with the department's reciprocal agreements.

WAC 296-150C-0500 When is an inspection required? Amendments were adopted to subsection (5) to incorporate department policy #97-11, "Factory Inspections Without Approved Plans." This brings chapter 296-150C WAC into compliance with state building codes.

WAC 296-150C-0560 What happens if I receive a notice of noncompliance after inspection of the alteration to my commercial coach? Amendments were adopted to add the words "or use" to prohibit the use of altered commercial coaches which are out of compliance and possibly unsafe.

WAC 296-150C-0800 What manufacturing codes apply to commercial coaches? Amendments were adopted to update code references in this section.

WAC 296-150C-0820 Structural analysis. Amendments were adopted to:

Incorporate in subsection (2) an unwritten department policy. Originally, this verbal policy was used to correct an error in WAC 296-150C-0820.

Rewrite the section heading in a question format to be consistent with the rest of the chapter.

WAC 296-150C-0960 Roof trusses. Amendments were adopted to:

Clarify the intent of the section by deleting the word "stress" in subsection (1)(a).

Rewrite the section heading in a question format to be consistent with the rest of the chapter.

WAC 296-150C-0980 Wall coverings. Amendments were adopted to repeal this section because it is a duplication of requirements contained in WAC 296-150C-1100.

WAC 296-150C-1080 Chassis. Amendments were adopted to:

Incorporate into paragraph (1) department policy #97-12, "Chassis Live Loads for Commercial Coaches." This policy had been issued to correct an error in WAC 296-150C-1080.

Add subsection (3) to clarify floor load requirements for a commercial coach in a set up mode.

Rewrite the section heading in a question format to be consistent with the rest of the chapter.

WAC 296-150C-1170 Light and ventilation. Amendments were adopted to:

Incorporate wording changes that were inadvertently omitted when the chapter was last revised. These amendments allow the installation of mechanical ventilation systems.

Rewrite the section heading in a question format to be consistent with the rest of the chapter.

WAC 296-150C-1303 How must storage batteries be installed in a commercial coach? Amendments were adopted to add this section which was inadvertently omitted when the chapter was rewritten in 1996.

WAC 296-150C-1580 What manufacturing codes apply when converting structures to vendor units? Amendments were adopted to add subsection (1)(d) to clarify which manufacturing codes apply when structures are converted to vendor units.

WAC 296-150C-1590 Structural analysis for acceptability. Amendments were adopted to:

Add language in subsection (1) that was inadvertently omitted when the chapter was rewritten in 1996. This amendment clarifies that the section applies to both Type A and Type B vendor units.

Rewrite the section heading in a question format to be consistent with the rest of the chapter.

WAC 296-150C-1600 Live loads. Amendments were adopted to:

Correct an error in subsection (2).

Rewrite the section heading in a question format to be consistent with the rest of the chapter.

WAC 296-150C-1720 Vendor unit exits. Amendments were adopted to:

Add subsection(5) to clarify requirements regarding exit doors.

Rewrite the section heading in a question format to be consistent with the rest of the chapter.

WAC 296-150C-1730 Electrical for vendor units. Amendments were adopted to:

Add subsection (3) electrical requirements for vendor units.

Add subsection (4) that was inadvertently omitted when the chapter was rewritten in 1996.

Rewrite the section heading in a question format to be consistent with the rest of the chapter.

WAC 296-150C-1740 Mechanical for vendor units. Amendments were adopted to:

Add subsection (2) to clarify the definition of "mechanical."

Rewrite the section heading in a question format to be consistent with the rest of the chapter.

WAC 296-150C-1750 What are the LPG system enclosure and mounting requirements for a vendor unit? Amendments were adopted to add this new section which was inadvertently omitted when the chapter was rewritten in 1996.

WAC 296-150C-1751 What are the fuel gas piping design requirements for a vendor unit? Amendments were adopted to add this new section which was inadvertently omitted when the chapter was rewritten in 1996.

WAC 296-150C-1752 Can gas tubing be concealed in a vendor unit? Amendments were adopted to add this new section which was inadvertently omitted when the chapter was rewritten in 1996.

WAC 296-150C-1753 What are the pipe-joint compound requirements for gas piping in a vendor unit? Amendments were adopted to add this new section which was inadvertently omitted when the chapter was rewritten in 1996.

WAC 296-150C-1754 What are the gas piping hanger and support requirements for a vendor unit? Amendments were adopted to add this new section which was inadvertently omitted when the chapter was rewritten in 1996.

WAC 296-150C-1755 What are the electrical bonding requirements for gas piping in a vendor unit? Amendments were adopted to add this new section which was inadvertently omitted when the chapter was rewritten in 1996.

WAC 296-150C-1756 How are gas supply connections in a vendor unit identified? Amendments were adopted to add this new section which was inadvertently omitted when the chapter was rewritten in 1996.

WAC 296-150C-1757 What requirements apply to gas piping system openings? Amendments were adopted to add this new section which was inadvertently omitted when the chapter was rewritten in 1996.

WAC 296-150C-1758 Are gas piping shut-off valves required in a vendor unit? Amendments were adopted to add this new section which was inadvertently omitted when the chapter was rewritten in 1996.

WAC 296-150C-1759 What requirements apply to testing for gas piping leaks before vendor unit appliances are connected? Amendments were adopted to add this new section which was inadvertently omitted when the chapter was rewritten in 1996.

WAC 296-150C-1760 What requirements apply to testing for gas piping leaks after vendor unit appliances are connected? Amendments were adopted to add this new section which was inadvertently omitted when the chapter was rewritten in 1996.

Chapter 296-150F WAC, Factory-built housing and commercial structures.

WAC 296-150F-0020 What definitions apply to this chapter? Amendments were adopted to delete the definition for "Temporary insignia." This amendment is proposed in response to customer requests. The use of temporary insignia proved unworkable for both the department and its customers.

WAC 296-150F-0130 How do I register a complaint? Amendments were adopted to add this new section which was inadvertently omitted when the chapter was rewritten in 1996.

WAC 296-150F-0200 Who must purchase factory-built housing and commercial structure insignia? Amendments were adopted to add language that was inadvertently omitted when the chapter was rewritten in 1996.

WAC 296-150F-0210 What are the insignia requirements? Amendments were adopted to clarify when a Washington state manufacturer does not have to purchase an insignia.

WAC 296-150F-0460 What information must a manufacturer provide when a professional or firm does the design plan approval? Amendments were adopted to add:

Subsection (7) to bring chapter 296-150F WAC into compliance with state electrical law.

Subsection (8) to comply with the department's reciprocal agreements.

WAC 296-150F-0500 When is an inspection required? Amendments were adopted to:

Correct a code reference in subsection (3).

Amend language in subsection (4) so that chapter 296-150F WAC complies with adopted state building codes.

Chapter 296-150M WAC, Manufactured homes.

WAC 296-150M-0020 What definitions apply to this chapter? Amendments were adopted to add language to the definition of "Alteration" which incorporates department policy ("Water Treatment Equipment in Mobile Homes") into chapter 296-150M WAC.

WAC 296-150M-0306 What codes are used when altering a manufactured (mobile) home? Amendments were adopted to add this new section:

To clarify the intent of RCW 43.22.432.

To incorporate department Procedural Bulletin 7/88, "Coding to be Applied to Insignias," into subsections (1) and (2).

WAC 296-150M-0307 How may I obtain a copy of the Manufactured Home Construction and Safety Standards, Part 24, CFR 3280? Amendments were adopted to add this new section to make it easier for department customers to obtain copies of the federal standards affecting manufactured homes.

WAC 296-150M-0310 What happens if I fail to get your approval prior to altering a manufactured home? Amendments were adopted to bring chapter 296-150M WAC into compliance with chapter 43.22 RCW.

WAC 296-150M-0331 Does my alteration permit expire? Amendments were adopted to add this new section to clarify the expiration date of an alteration permit.

WAC 296-150M-0400 How do I apply for alteration approval and obtain an alteration insignia? Amendments were adopted to clarify when "first hour" inspection fees must be paid to the department.

WAC 296-150M-0600 Who establishes standards for installation of manufactured homes? Amendments were adopted to distinguish local jurisdiction installation requirements from department installation requirements.

WAC 296-150M-0610 What instructions are used for a manufactured home installation? Amendments were adopted to clarify whose instructions are followed when installing manufactured homes.

WAC 296-150M-0620 Do local enforcement agencies have special requirements for installing manufactured homes in hazardous areas? Amendments were adopted to clarify structural requirements in earthquake zones.

WAC 296-150M-0640 Does a person who installs a manufactured home need an installation permit? Amendments were adopted to clarify the scope of subsection (3) by adding the words "owner or agent."

WAC 296-150M-0660 What are the requirements for on-site structures and who regulates them? Amendments were adopted to clarify the scope of local versus department jurisdiction.

WAC 296-150M-0700 Acceptable types of ground cover. Amendments were adopted to repeal this section because the requirements have been incorporated into WAC 296-150M-0610 (1)(k).

WAC 296-150M-0710 Clearance under manufactured homes. Amendments were adopted to repeal this section because the requirements have been incorporated into WAC 296-150M-0610 (1)(l).

WAC 296-150M-0730 Heat pump. Amendments were adopted to repeal this section because the requirements have been incorporated into WAC 296-150M-0610 (1)(m).

Citation of Existing Rules Affected by this Order: Amending Chapter 296-150C WAC, Commercial coaches, WAC 296-150C-0020 What definitions apply to this chapter? WAC 296-150C-0310 Who can approve design plans? WAC 296-150C-0320 What must I provide with my request for commercial coach design-plan approval by the department? WAC 296-150C-0410 When does my design plan expire? WAC 296-150C-0460 What information must a manufacturer provide when a professional or firm does the design-plan approval? WAC 296-150C-0500 When is an inspection required? WAC 296-150C-0560 What happens if I receive a notice of noncompliance after inspection of the alteration to my commercial coach? WAC 296-150C-0800 What manufacturing codes apply to commercial coaches? WAC 296-150C-0820 Structural analysis. WAC 296-150C-0960 Roof trusses. WAC 296-150C-1080 Chassis. WAC 296-150C-1170 Light and ventilation. WAC 296-150C-1580 What manufacturing codes apply when converting structures to vendor units? WAC 296-150C-1590 Structural analysis for acceptability. WAC 296-150C-1600 Live loads. WAC 296-150C-1720 Vendor unit exits. WAC 296-150C-1730 Electrical for vendor units. WAC 296-150C-1740 Mechanical for vendor units.

Chapter 296-150F WAC, Factory-built housing and commercial structures, WAC 296-150F-0020 What definitions apply to this chapter? WAC 296-150F-0200 Who must purchase factory-built housing and commercial structure insignia? WAC 296-150F-0210 What are the insignia requirements? WAC 296-150F-0460 What information must a manufacturer provide when a professional or firm does the design plan approval? WAC 296-150F-0500 When is an inspection required?

Chapter 296-150M WAC, Manufactured homes, WAC 296-150M-0020 What definitions apply to this chapter? WAC 296-150M-0310 What happens if I fail to get your approval prior to altering a manufactured home? WAC 296-150M-0400 How do I apply for alteration approval and obtain an alteration insignia? WAC 296-150M-0600 Who establishes standards for installation of manufactured homes? WAC 296-150M-0610 What instructions are used for a manufactured home installation? WAC 296-150M-0620 Do local enforcement agencies have special requirements for installing manufactured homes in hazardous areas? WAC 296-150M-0640 Does a person who installs a manufactured home need an installation permit? WAC 296-150M-0660 What are the requirements for on-site structures and who regulates them?

Repealed sections: WAC 296-150C-0980 Wall coverings. WAC 296-150M-0700 Acceptable types of ground cover. WAC 296-150M-0710 Clearance under manufactured homes. WAC 296-150M-0730 Heat pump.

Statutory Authority for Adoption: Chapter 43.22 RCW.

Adopted under notice filed as WSR 98-07-095 on March 18, 1998.

Changes Other than Editing from Proposed to Adopted Version: As a result of written and oral comments received, the sections listed below are being amended. The effect of these amendments upon the adopted rule represents no change from the effect of the published proposed rule.

Chapter 296-150C WAC, Commercial coaches.

WAC 296-150C-1580 What manufacturing codes apply when converting structures to vendor units? The department has corrected the code references in subsections (1)(a), (c) and (d).

Chapter 296-150M WAC, Manufactured homes.

WAC 296-150M-0020 What definitions apply to this chapter? To increase clarity, the department has added the words "whole-house" and the phrase "that requires cutting into the existing plumbing" to the new language in the definition of "Alteration." The new language now reads: "The installation of whole-house water treatment equipment that requires cutting into the existing plumbing is considered an alteration and requires a permit, an inspection and an alteration insignia."

WAC 296-150M-0306 What codes are used when altering a manufactured (mobile) home? To increase clarity, the department has deleted the phrase "What definitions apply to this chapter?" from subsection (2).

WAC 296-150M-0610 What instructions are used for a manufactured home installation? To increase clarity, the department has made the following changes in WAC 296-150M-0610:

In WAC 296-150M-0610 (1)(d)(i), the words "properly attached" have been deleted. The sentence now reads: "Skirting must not trap water between the skirting and siding or trim."

In WAC 296-150M-0610 (1)(d)(iii), the word "finished" was inserted into the first sentence. The first sentence now reads: "Access to the under floor area of a manufactured home must have a finished opening at least eighteen inches by twenty-four inches in size."

In WAC 296-150M-0610 (1)(f), the ANSI code reference has been updated to reference ANSI 225.1.

In WAC 296-150M-0610 (1)(m), the words "and air conditioning" have been inserted into the sentence. The sentence now reads: "Heat pump and air conditioning condensation lines must be extended to the exterior of the manufactured home."

WAC 296-150M-0620 Do local enforcement agencies have special requirements for installing manufactured homes in hazardous areas? To increase clarity, the words "the home manufacturer or by" have been added to the second sentence in WAC 296-150M-0620 (2)(b). The sentence now reads: "In such areas, local jurisdictions may require an earthquake resistant bracing system designed for the earthquake zone in which the home is located by the home manufacturer or by a registered professional engineer or architect."

WAC 296-150M-0660 What are the requirements for on-site structures and who regulates them? To increase clarity, the words "aluminum or wood" have been deleted from the first sentence of WAC 296-150M-0660 (1)(b) and (2)(b). The sentence in subsection (1)(b) now reads: "Awnings and carports that are self-supported by a beam next to a manufactured (mobile) home are inspected by the local enforcement agency." The sentence in subsection (2)(b) now reads: "Awnings and carports that are attached to the manufactured (mobile) home without the benefit of a self-supported beam requires approval and inspection by the department."

Number of Sections Adopted in Order to Comply with Federal Statute: New 0, amended 0, repealed 0; Federal Rules or Standards: New 0, amended 0, repealed 0; or Recently Enacted State Statutes: New 0, amended 0, repealed 0.

Number of Sections Adopted at Request of a Nongovernmental Entity: New 0, amended 0, repealed 0.

Number of Sections Adopted on the Agency's Own Initiative: New 16, amended 31, repealed 4.

Number of Sections Adopted in Order to Clarify, Streamline, or Reform Agency Procedures: New 0, amended 0, repealed 0.

Number of Sections Adopted Using Negotiated Rule Making: New 0, amended 0, repealed 0; Pilot Rule Making: New 0, amended 0, repealed 0; or Other Alternative Rule Making: New 16, amended 31, repealed 4.

Effective Date of Rule: Thirty-one days after filing.

June 24, 1998

Gary Moore

Director

AMENDATORY SECTION (Amending WSR 96-21-146, filed 10/23/96, effective 11/25/96)

WAC 296-150C-0020  What definitions apply to this chapter? "Alteration" is the replacement, addition, modification, or removal of any equipment or installation that affects the construction, fire and life safety, or the plumbing, mechanical, and electrical systems of a commercial coach.

The following are not considered alterations:

Repairs with approved parts;

Modification of a fuel-burning appliance according to the listing agency's specifications; or

Adjustment and maintenance of equipment.

"Approved" is approved by the department of labor and industries.

"Building site" is a tract, parcel, or subdivision of land on which a commercial coach will be installed.

"Consumer" is a person or organization, excluding a manufacturer or dealer of commercial coaches, who buys or leases a commercial coach.

"Commercial coach" is a structure (referred to as a unit) that:

Can be transported in one or more sections;

Is used for temporary commercial purposes;

Is built on a permanent chassis;

Conforms to the construction standards of this chapter;

May include plumbing, mechanical, electrical and other systems; and

Includes Type A and Type B vendor units.

Type A vendor unit is a commercial coach vehicle such as, but not limited to, a truck, van, or step van. The maximum dimensions of a Type A vendor unit are 8 feet wide by 24 feet long in the set-up mode.

Type B vendor unit is a commercial coach structure such as, but not limited to, a recreational vehicle as defined by the American National Standards Institute, Inc. that is being converted to a vendor unit. The maximum dimensions of a Type B vendor unit are 8 feet wide by 24 feet long in the set-up mode.

Note: A commercial coach may not be used as a single-family dwelling. A commercial coach does not have to be placed on a permanent foundation.

(2) Vendor units may comply with chapter 296-150C WAC, WAC 296-150C-0010 through 296-150C-1570 or WAC 296-150C-0010 through 296-150C-0710 and WAC 296-150C-1580 through 296-150C-3000.

"Damaged in transit" means damage that affects the integrity of a structural design or any of the systems.

"Dealer" is a person, company, or corporation whose business is leasing, selling, offering for lease or sale, buying, or trading commercial coaches.

"Department" is the department of labor and industries. The department may be referred to as "we" or "us" in this chapter. Note: You may contact us at: Department of Labor and Industries, Specialty Compliance, PO Box 44440, Olympia, WA 98504-4440.

"Design plan" is a plan for the construction or alteration of a commercial coach or conversion of a vehicle to a commercial coach including floor plans, elevation drawings, specifications, engineering data, or test results necessary for a complete evaluation of the design.

"Design option" is a design that a manufacturer may use as an option to its commercial coach design plan.

"Equipment" is all material, appliances, devices, fixtures, fittings, or accessories used in the manufacture, assembly, conversion to, or alteration of a commercial coach.

"Factory assembled structure (FAS) advisory board" is a board authorized to advise the director of the department regarding the issues and adoption of rules relating to commercial coaches. (See RCW 43.22.420.)

"Insignia" is a label that we attach to a commercial coach to verify that the structure meets the requirements of this chapter and the applicable codes.

"Install" is to erect, construct, assemble, or set a commercial coach in place.

"Labeled" is to bear the department's insignia.

"Listed" is a piece of equipment or apparatus that has been approved by a testing agency to the appropriate standard.

"Local enforcement agency" is an agency of city or county government with power to enforce local regulations governing the installation of a commercial coach.

"Master design plan" is a design plan that expires when a new state building code has been adopted.

"One-year design plan" is a design plan that expires one year after approval or when a new state building code has been adopted.

"System" is part of a commercial coach designed to serve a particular function. Examples include structural, plumbing, electrical, or mechanical systems.

"Vendor unit" is a type of commercial coach (referred to as a unit) that:

Is transported in only one section;

Is designed for highway use;

Is temporarily occupied for distribution of items (e.g., food);

Is built on a permanent chassis;

Includes at least one of the following systems: Plumbing, mechanical, or electrical;

Is a converted structure, not a newly manufactured structure; and

Is a Type A vendor unit or a Type B vendor unit.

Note: Newly manufactured units must comply with the commercial coach construction requirements of this chapter. Unoccupied vendor units are exempt from the requirements of this chapter. For example, those vehicles where food is sold and distributed by standing alongside it.

[Statutory Authority: RCW 43.22.340, [43.22.]355, [43.22.]360, [43.22.]432, [43.22.]440 and [43.22.]480. 96-21-146, § 296-150C-0020, filed 10/23/96, effective 11/25/96.]

AMENDATORY SECTION (Amending WSR 96-21-146, filed 10/23/96, effective 11/25/96)

WAC 296-150C-0310  Who can approve design plans? (1) Design plans can be approved by us or by a licensed professional or firm authorized by us. (See WAC 296-150C-0420 and 296-150C-0430.)

(2) All electrical design plans for new or altered electrical installations for educational institutions, health care facilities, and other buildings ((see chapters 296-46, 296-130, 296-140, and 296-150 WAC Table 1 or 2)) required by chapter 296-46 WAC, Safety standards--Installing electric wires and equipment--Administrative rules, must be reviewed and approved by us.

(3) A professional cannot approve plans submitted under a reciprocal agreement.

[Statutory Authority: RCW 43.22.340, [43.22.]355, [43.22.]360, [43.22.]432, [43.22.]440 and [43.22.]480. 96-21-146, § 296-150C-0310, filed 10/23/96, effective 11/25/96.]

AMENDATORY SECTION (Amending WSR 96-21-146, filed 10/23/96, effective 11/25/96)

WAC 296-150C-0320  What must I provide with my request for commercial coach design-plan approval by the department? All requests for design-plan approval must include:

(1) A completed design-plan approval request form;

(2) Two sets of design plans plus elevation drawings, specifications, engineering analysis, and test results and procedures necessary for a complete evaluation of the design; (See WAC 296-150C-0340 and 296-150C-0350.)

(3) At least one set of design plans must have an original wet stamp from a professional engineer or architect licensed in Washington state. We will retain the set with the original wet stamp;

(4) Receipt of a one-time initial design plan filing fee and the initial design plan fee (see WAC 296-150C-3000);

(5) A "key drawing" to show the arrangement of modules if the plan covers three or more modules;

(6) The occupancy class of the commercial coach according to the occupancy classifications in The Uniform Building Code;

(7) All plans required by WAC 296-46-140 (Plan review for educational, institutional or health care facilities and other buildings) must be reviewed by the department. The department's fee for this plan review is listed in the fee table in WAC 296-150C-3000, Commercial coach fees.

[Statutory Authority: RCW 43.22.340, [43.22.]355, [43.22.]360, [43.22.]432, [43.22.]440 and [43.22.]480. 96-21-146, § 296-150C-0320, filed 10/23/96, effective 11/25/96.]

AMENDATORY SECTION (Amending WSR 96-21-146, filed 10/23/96, effective 11/25/96)

WAC 296-150C-0410  When does my design plan expire? Commercial Coach - Master Design Plan:

(1) Your commercial coach master design plan expires when there is a code change. You must submit new design plans for approval when there is a state building code cycle change. You may use your approved master design plans to order insignia as long as they comply with the applicable codes.

Commercial Coach - One-Year Design Plan:

(2) Your commercial coach one-year design plan expires either one year after approval or when there is a code change. You must submit new design plans for approval when there is a state building code cycle change. You may use your design plans to order insignia as long as they comply with the applicable codes.

(3) All National Electrical Code amendments may be incorporated by an addendum to your design plan.

Note: The State Building Code is on a three-year code cycle which coincides with the State Building Code Council amendment cycle. The National Electrical Code (NEC) cycle, however, does not coincide with the other code cycles.

Commercial Coach Vendor Unit:

(4) Your vendor unit design plan expires after the unit is converted or altered. You can only use this design plan once.

(((5) The effective date of this rule is November 25, 1996. Manufacturers who have approved design plans can continue production under the old rules for one hundred twenty days after the effective date of these rules. Manufacturers who are submitting new design plans after the effective date of these rules can submit and produce under the old rules for one hundred twenty days after the effective date of these rules.))

[Statutory Authority: RCW 43.22.340, [43.22.]355, [43.22.]360, [43.22.]432, [43.22.]440 and [43.22.]480. 96-21-146, § 296-150C-0410, filed 10/23/96, effective 11/25/96.]

AMENDATORY SECTION (Amending WSR 96-21-146, filed 10/23/96, effective 11/25/96)

WAC 296-150C-0460  What information must a manufacturer provide when a professional or firm does the design-plan approval? You must provide the following information with your approved design plans:

(1) A completed departmental design-plan approval request form;

(2) Two or more sets of design plans plus elevation drawings, specifications, engineering analysis, and test results and procedures necessary for a complete evaluation of the design. These design plans must have an original wet stamp, be signed, and dated by the approving professional(s) (see WAC 296-150C-0340 and 296-150C-0350);

(3) A cover sheet on the design plan noting which professional approved each portion of the design plan;

(4) A copy of the authorization letter from us; ((and))

(5) The design plan fee for design plans approved by professionals or firms((.)); (see WAC 296-150C-3000.)

(6) A professional who designs and certifies that the commercial coach design meets state requirements cannot also approve the design plan in the plan approval process;

(7) A professional cannot approve those electrical designs listed in WAC 296-150C-0310(2); and

(8) A professional cannot approve plans submitted under a reciprocal agreement.

[Statutory Authority: RCW 43.22.340, [43.22.]355, [43.22.]360, [43.22.]432, [43.22.]440 and [43.22.]480. 96-21-146, § 296-150C-0460, filed 10/23/96, effective 11/25/96.]

AMENDATORY SECTION (Amending WSR 96-21-146, filed 10/23/96, effective 11/25/96)

WAC 296-150C-0500  When is an inspection required? (1) Before we issue an insignia, each unit manufactured or converted must be inspected as many times as required to show compliance with this chapter.

Note: Each commercial coach must have a serial number so we can track inspections.

(2) Before we issue an insignia, each commercial coach must be inspected at the manufacturing location as many times as required. Inspections may include but are not limited to:

(a) A "cover" inspection during construction of the unit before the electrical, plumbing, mechanical, and structural systems are covered;

(b) Insulation and vapor barrier inspection, if required; and

(c) A final inspection after the commercial coach is complete.

(3) If we discover a violation during inspection, we will issue a notice of noncompliance. You can correct the violation during the inspection. If you cannot correct the violation during inspection, you must leave the item uncovered until we approve your correction.

(4) If a commercial coach is damaged in transit to the building site or during on-site installation, it must be inspected. This is considered an alteration inspection. (See WAC 296-150C-0240.)

(5) Approved design plans((, specifications, engineering analysis and test results must be available during the inspection)) must be available in compliance with the applicable sections of the adopted state codes.

(6) Once your unit is inspected and approved we will attach the insignia.

Commercial Coach Vendor Unit

(7) Before we issue an insignia, each commercial coach vendor unit is inspected as follows:

(a) Inspection(s) during conversion or alteration of a commercial coach vendor unit; and

(b) A final inspection after the commercial coach vendor unit is complete.

[Statutory Authority: RCW 43.22.340, [43.22.]355, [43.22.]360, [43.22.]432, [43.22.]440 and [43.22.]480. 96-21-146, § 296-150C-0500, filed 10/23/96, effective 11/25/96.]

AMENDATORY SECTION (Amending WSR 96-21-146, filed 10/23/96, effective 11/25/96)

WAC 296-150C-0560  What happens if I receive a notice of noncompliance after inspection of the alteration to my commercial coach? (1) If your commercial coach alteration does not pass our inspection, you will receive a notice of noncompliance. The notice of noncompliance explains what items must be corrected.

(2) You have twenty days after receiving the notice of noncompliance to send us a written response to explain how you will correct the violations.

(3) You are not allowed to sell, lease, ((or)) offer for sale or use the altered commercial coach until you correct the violations. We must inspect and approve the corrections, and you must pay the inspection and insignia fees, if required (see WAC 296-150C-3000).

[Statutory Authority: RCW 43.22.340, [43.22.]355, [43.22.]360, [43.22.]432, [43.22.]440 and [43.22.]480. 96-21-146, § 296-150C-0560, filed 10/23/96, effective 11/25/96.]

AMENDATORY SECTION (Amending WSR 96-21-146, filed 10/23/96, effective 11/25/96)

WAC 296-150C-0800  What manufacturing codes apply to commercial coaches? (1) All design, construction, and installations of commercial coaches must conform with the following codes and the requirements of this chapter:

(a) The latest adopted version of the Washington State Ventilation and Indoor Air Quality Code, ((1991 third edition)) as adopted by chapter 51-13 WAC;

(b) The structural and other requirements of this chapter;

(c) Occupancy classification only from chapter 3 of The Uniform Building Code, ((1994)) 1997 edition as adopted and amended by chapter ((51-30)) 51-40 WAC, except commercial coaches must not be group H or R-3 occupancy;

(d) Accessibility requirements of chapter 11 of The Uniform Building Code, ((1994)) 1997 edition as adopted and amended by chapter ((51-30)) 51-40 WAC;

(e) Table 16-A Uniform and concentrated floor loads and footnotes of The Uniform Building Code, ((1994)) 1997 edition as adopted and amended by chapter ((51-30)) 51-40 WAC;

(f) The Uniform Mechanical Code, ((1994)) 1997 edition as adopted and amended by chapter ((51-32)) 51-42 WAC except when conflicting with the provisions of this chapter, this chapter controls;

(g) The National Electrical Code as referenced in chapter 19.28 RCW and chapter 296-46 WAC;

(h) The latest adopted version of the Washington State Energy Code, ((1994 second edition)) as adopted by chapter 51-11 WAC;

(i) The Uniform Plumbing Code, ((1991)) 1997 edition as adopted and amended by chapters ((51-26 and 51-27 WAC.)) 51-46 and 51-47 WAC;

(j) Where there is a conflict between codes, an earlier named code takes precedent over a later named code. Where, in any specific case, different sections of this code specify different materials, methods of construction or other requirements, the most restrictive governs. Where there is a conflict between a general requirement and a special requirement, the specific requirement must be applicable.

(2) All construction methods and installations must use accepted engineering practices, provide minimum health and safety to the occupants of commercial coaches and the public, and demonstrate journeyman quality of work of the various trades.

(3) Requirements for any size, weight, or quality of material modified by the terms "minimum," "not less than," "at least," and similar expressions are minimum standards. The manufacturer may exceed these rules provided the deviation does not result in inferior installation or defeat the purpose and intent of this chapter.

Note: The codes, RCW's and WAC's referenced in this rule are available to view at the Washington State Library, the Washington State Law Library, and may also be available at your local library.

[Statutory Authority: RCW 43.22.340, [43.22.]355, [43.22.]360, [43.22.]432, [43.22.]440 and [43.22.]480. 96-21-146, § 296-150C-0800, filed 10/23/96, effective 11/25/96.]

AMENDATORY SECTION (Amending WSR 96-21-146, filed 10/23/96, effective 11/25/96)

WAC 296-150C-0820  ((Structural analysis.)) What are the basic structural requirements of a commercial coach? Each commercial coach must be designed and constructed as a completely integrated structure capable of sustaining the design-load requirements of this chapter. It shall be capable of:

(1) Transmitting these loads to stabilizing devices without causing unsafe deformation or abnormal structural movement; and

(2) Withstanding the adverse effects of transportation shock and vibration((, both)) as an integrated structure ((and as to its parts)).

[Statutory Authority: RCW 43.22.340, [43.22.]355, [43.22.]360, [43.22.]432, [43.22.]440 and [43.22.]480. 96-21-146, § 296-150C-0820, filed 10/23/96, effective 11/25/96.]

AMENDATORY SECTION (Amending WSR 96-21-146, filed 10/23/96, effective 11/25/96)

WAC 296-150C-0960  ((Roof trusses.)) What requirements apply to commercial coach roof trusses? (1) The construction of roof trusses must be approved by a professional engineer. Roof trusses may be produced by one of the following methods:

(a) Use of ((stress)) graded materials when an approved testing agency certifies truss construction and load requirements are met; the testing agency must prepare an approved quality control program which allows them to test the trusses with appropriate testing procedures.

(b) Use of nongraded materials, if each truss is tested in an approved testing jig at the manufacturer's site with a load equivalent to full design load (1.75 times the full design load sustained for twelve hours).

(2)(a) Representative trusses must be tested from the production line, when we request. The approved testing agency or engineer must submit the testing report to us.

(b) All test reports are to be stamped, signed, and dated by the approved testing agency or engineer who performs the test.

(c) These tests must not occur more than two times a year per design unless there are problems with the roof trusses.

(d) The manufacturer is required to maintain an acceptable quality level not exceeding 1% using acceptable sampling procedures.

Note: The acceptable quality level is defined as the maximum allowable percentage of defective units.

[Statutory Authority: RCW 43.22.340, [43.22.]355, [43.22.]360, [43.22.]432, [43.22.]440 and [43.22.]480. 96-21-146, § 296-150C-0960, filed 10/23/96, effective 11/25/96.]

AMENDATORY SECTION (Amending WSR 96-21-146, filed 10/23/96, effective 11/25/96)

WAC 296-150C-1080  ((Chassis.)) What design and construction requirements apply to a commercial coach chassis? Each commercial coach chassis must be designed and constructed to be capable of:

(1) Effectively sustaining the design loads consisting of the dead load plus ((the live)) five PSF load ((of)) on the floor and the superimposed dynamic load resulting from highway movement, in no case shall the dynamic load be required to exceed twice the dead load; and

(2) Accepting the shock and vibration from the roadway and towing vehicle through the use of adequate running gear assemblies. Running gear assemblies consist of axles, springs, spring hangers, hubs, bearings, tires, rims and their related hardware. Running gear assemblies must be capable of sustaining the loads in subsection (1) of this section.

(3) In the set up mode, the commercial coach must be designed to accommodate a fifty PSF floor load.

[Statutory Authority: RCW 43.22.340, [43.22.]355, [43.22.]360, [43.22.]432, [43.22.]440 and [43.22.]480. 96-21-146, § 296-150C-1080, filed 10/23/96, effective 11/25/96.]

AMENDATORY SECTION (Amending WSR 96-21-146, filed 10/23/96, effective 11/25/96)

WAC 296-150C-1170  ((Light and ventilation.)) What are the lighting and ventilation requirements of a commercial coach? (1) Habitable rooms must be provided with exterior windows or doors having a total glazed area of at least ten percent of the floor area, or they must have artificial light.

(2) An area equal to a minimum of five percent of the floor area must be available for unobstructed ventilation. Glazed areas do not need to be opened if a mechanical ventilation system is provided. The mechanical ventilation system must be capable of producing a change of air in the room every thirty minutes with at least one-fifth of the air supply taken from outside the commercial coach.

(3) Each bathroom must be provided with artificial light and with external windows or a mechanical exhaust must be provided. The external window must have at least 1/2 square feet of glazed area fully able to open((, except where)). A mechanical ventilation system must be capable of producing a change of air every twelve minutes ((is provided)). Any mechanical ventilation system must exhaust directly to the outside of the commercial coach.

[Statutory Authority: RCW 43.22.340, [43.22.]355, [43.22.]360, [43.22.]432, [43.22.]440 and [43.22.]480. 96-21-146, § 296-150C-1170, filed 10/23/96, effective 11/25/96.]

NEW SECTION

WAC 296-150C-1303  How must storage batteries be installed in a commercial coach? Storage batteries subject to the provisions of this standard must be securely attached to the commercial coach. They must be installed in an area which is vapor-tight to the interior and ventilated directly to the exterior of the coach. When batteries are installed in a compartment, the compartment must be ventilated with openings of not less than two square inches at the top and two square inches at the bottom. Batteries must not be installed in a compartment containing spark or flame producing equipment, except in an engine generator compartment if the only charging source is the generator itself.

[]

AMENDATORY SECTION (Amending WSR 96-21-146, filed 10/23/96, effective 11/25/96)

WAC 296-150C-1580  What manufacturing codes apply when converting structures to vendor units? (1) The conversion of a structure to a vendor unit must comply with the following codes:

(a) The Uniform Mechanical Code, with the amendments made by the Washington State Building Code Council, chapter ((51-32)) 51-42 WAC;

(b) The National Electrical Code as referenced in chapter 19.28 RCW and chapter 296-46 WAC, Installing Electric Wires and Equipment; ((and))

(c) The Uniform Plumbing Code ((1991)) 1997 edition with the amendments under chapter 19.27 RCW; and

(d) The Washington State Building Code Council, chapter 51-40 WAC, Uniform Building Code, Chapter 11, Accessibility as applies to the exterior of the unit relating to customer service facilities in section 1105.4.7.

(2) All construction methods and installations must use accepted engineering practices, provide minimum health and safety to the occupants of commercial coaches and the public, and demonstrate journeyman quality of work of the various trades.

(3) Requirements for any size, weight, or quality of material modified by the terms "minimum," "not less than," "at least," and similar expressions are minimum standards. The person converting a structure to a vendor unit may exceed these rules provided the deviation does not result in inferior installation or defeat the purpose and intent of this chapter.

[Statutory Authority: RCW 43.22.340, [43.22.]355, [43.22.]360, [43.22.]432, [43.22.]440 and [43.22.]480. 96-21-146, § 296-150C-1580, filed 10/23/96, effective 11/25/96.]

AMENDATORY SECTION (Amending WSR 96-21-146, filed 10/23/96, effective 11/25/96)

WAC 296-150C-1590  ((Structural analysis for acceptability.)) Is a structural analysis required when converting a vehicle or structure to a vendor unit? (1) A "Type A vendor unit" is a commercial coach such as, but not limited to, a truck, van, or step van that meet the requirements of this chapter. Conversion of a truck, van or step van to a "Type A vendor unit" requires an engineering analysis or structural test to determine if the vehicle is structurally acceptable for use as a Type A vendor unit.

(2) A "Type B vendor unit" is a commercial coach such as, but not limited to, a recreational vehicle as defined by the American National Standard Institute, Inc. Conversion of a structure to a Type B vendor unit requires an engineering analysis or structural tests to determine whether it is structurally acceptable for use.

[Statutory Authority: RCW 43.22.340, [43.22.]355, [43.22.]360, [43.22.]432, [43.22.]440 and [43.22.]480. 96-21-146, § 296-150C-1590, filed 10/23/96, effective 11/25/96.]

AMENDATORY SECTION (Amending WSR 96-21-146, filed 10/23/96, effective 11/25/96)

WAC 296-150C-1600  ((Live loads.)) What are the live load requirements of a vendor unit? (1) The design live loads for vendor units are:

(a) Roof 25 psf

(b) Floor 40 psf

(2) ((The roof live load must not be considered as acting simultaneously with the wind load. The roof and the floor live loads must not be considered as resisting the overturning moment due to wind.)) No wind load design is required.

(3) The roof live load and the floor live load must be considered to act both simultaneously and separately in order to determine the critical design loading for stresses and deflections.

[Statutory Authority: RCW 43.22.340, [43.22.]355, [43.22.]360, [43.22.]432, [43.22.]440 and [43.22.]480. 96-21-146, § 296-150C-1600, filed 10/23/96, effective 11/25/96.]

AMENDATORY SECTION (Amending WSR 96-21-146, filed 10/23/96, effective 11/25/96)

WAC 296-150C-1720  ((Vendor unit exits.)) What requirements apply to vending unit exits? At least one vending unit exit must comply with the following:

(1) Exterior doors must be constructed for exterior use.

(2) The exterior door must be at least thirty-inches wide by seventy-two inches high.

(3) Each swinging exterior door must have a key-operated lock that has a deadlock latch. A deadlock with a passage set installed below the deadlock may be used as an acceptable alternate for each exterior door. The locking mechanism must be engaged or disengaged by the use of a lever, knob, button, handle, or other device from the interior of the vending unit.

(4) Locks must not require the use of a key for operation from the inside.

(5) Exit doors may either be hinged or sliding. Roll-up doors may not be used to meet the requirements of this section.

[Statutory Authority: RCW 43.22.340, [43.22.]355, [43.22.]360, [43.22.]432, [43.22.]440 and [43.22.]480. 96-21-146, § 296-150C-1720, filed 10/23/96, effective 11/25/96.]

AMENDATORY SECTION (Amending WSR 96-21-146, filed 10/23/96, effective 11/25/96)

WAC 296-150C-1730  ((Electrical for vendor units.)) What code and installation requirements apply to vendor unit electrical systems? The electrical system in any vendor unit must comply with the National Electrical Code as referenced in chapter 19.28 RCW, Article 550 and the applicable portions of other Articles as required by this section.

(1) Appliances must be installed per Articles 422 - Appliances.

(2) Generators must be installed per Article 445 - Generators.

(3) The unit must be served by a four-wire system. The neutral bar termination of the grounded circuit conductor must be isolated.

(4) Storage batteries subject to the provisions of this standard must be securely attached to the commercial coach. They must be installed in an area which is vapor-tight to the interior and ventilated directly to the exterior of the coach. When batteries are installed in a compartment, the compartment must be ventilated with openings of not less than two square inches at the top and two square inches at the bottom. Batteries must not be installed in a compartment containing spark or flame producing equipment, except in an engine generator compartment if the only charging source is the generator itself.

[Statutory Authority: RCW 43.22.340, [43.22.]355, [43.22.]360, [43.22.]432, [43.22.]440 and [43.22.]480. 96-21-146, § 296-150C-1730, filed 10/23/96, effective 11/25/96.]

AMENDATORY SECTION (Amending WSR 96-21-146, filed 10/23/96, effective 11/25/96)

WAC 296-150C-1740  ((Mechanical for vendor units.)) What are the mechanical requirements for a vendor unit? (1) This chapter applies to the installation of mechanical, ventilation, and indoor air quality equipment in any vendor unit bearing or required to bear a department insignia. When mechanical, ventilation, and indoor air quality equipment is installed in or on a vendor unit, it must be installed according to the requirements of the Uniform Mechanical Code, the Washington State Ventilation and Indoor Air Quality Code, the rules of this chapter, and the conditions of the equipment approval or listing agency.

(2) For definitions of mechanical, see WAC 296-150C-1340.

[Statutory Authority: RCW 43.22.340, [43.22.]355, [43.22.]360, [43.22.]432, [43.22.]440 and [43.22.]480. 96-21-146, § 296-150C-1740, filed 10/23/96, effective 11/25/96.]

NEW SECTION

WAC 296-150C-1750  What are the LPG system enclosure and mounting requirements for a vendor unit? (1) LPG containers must not be installed, nor stored temporarily, inside any vendor unit.

Exception: This prohibition does not apply to completely self-contained hand torches, lanterns, or similar equipment with containers having a maximum water capacity of two and one-half pounds (approximately one pound LPG capacity).

(2)(a) Containers, control valves and regulating equipment, when installed, must be mounted on the "A" frame of the vendor unit or installed in a compartment that is vapor-tight to the inside of the vendor unit and accessible only from the outside.

(b) The compartment must be ventilated at top and bottom to diffuse vapors. The compartment must be ventilated with two vents having an aggregate area of not less than two percent of the floor area of the compartment and must open without restriction to the outside. The required vents must be equally distributed between the floor and ceiling of the compartment. If the lower vent is located in the access door or wall, the bottom edge of the vent must be flush with the floor level of the compartment. The top vent must be located in the access door or wall with the bottom of the vent not more than twelve inches below the ceiling level of the compartment. All vents must have an unrestricted discharge to the outside atmosphere. Access doors or panels of compartments must not be equipped with locks or require special tools or knowledge to open.

(3) Doors, hoods, domes, or portions of housings and enclosures required to be removed or opened for container replacement must incorporate means for clamping them firmly in place and preventing them from working loose during transit. Provisions must be incorporated in the assembly to hold the containers firmly in position and prevent their movement during transit.

(4) LPG containers must be mounted on a substantial support or a base secured firmly to the vendor unit chassis. Neither the container nor its support can extend below the vendor unit frame.

[]

NEW SECTION

WAC 296-150C-1751  What are the fuel gas piping design requirements for a vendor unit? Vendor units requiring fuel gas for any purpose must be equipped with a gas piping system that is designed for LPG only or combination LPG and natural gas.

[]

NEW SECTION

WAC 296-150C-1752  Can gas tubing be concealed in a vendor unit? (1) Tubing must not be run inside walls, floors, partitions, or roofs.

(2) If tubing passes through walls, floors, partitions, roofs, or similar installations, the tubing must be protected by the use of weather resistant grommets that snugly fit both the tubing and the hole through which the tubing passes.

[]

NEW SECTION

WAC 296-150C-1753  What are the pipe-joint compound requirements for gas piping in a vendor unit? (1) Screw joints must be made tight with pipe-joint compound that is insoluble in liquefied petroleum gas.

(2) Pipe-joint compound must be approved for the type of gas used. The pipe-joint compound must be applied to the male threads only.

[]

NEW SECTION

WAC 296-150C-1754  What are the gas piping hanger and support requirements for a vendor unit? (1) All gas piping must be adequately supported by galvanized or equivalently protected metal straps or hangers at intervals of not more than four feet, except where adequate support and protection is provided by structural members.

(2) Gas pipe supply connections must be rigidly anchored to a structural member within six inches of the supply connections.

[]

NEW SECTION

WAC 296-150C-1755  What are the electrical bonding requirements for gas piping in a vendor unit? (1) Gas piping must not be used for an electrical ground.

(2) The gas line must be bonded.

[]

NEW SECTION

WAC 296-150C-1756  How are gas supply connections in a vendor unit identified? A label must be permanently attached on the outside of the exterior wall of the vendor unit adjacent to the gas supply connection which provides the following information:

(1) The type of system (i.e., liquid petroleum system or natural gas system or combination liquid petroleum and natural gas system);

(2) The appropriate Btuh input rating; and

(3) If excess ("or more") Btuh input is allowed.

For example: Natural Gas System

250,000 Btuh

Or More

[]

NEW SECTION

WAC 296-150C-1757  What requirements apply to gas piping system openings? All openings in the gas piping system must be closed gas-tight with threaded pipe plugs or pipe caps.

[]

NEW SECTION

WAC 296-150C-1758  Are gas piping shut-off valves required in a vendor unit? (1) In addition to any valve on the appliance, a shut-off valve must be installed in the fuel piping outside of each gas appliance but inside the vendor unit structure and upstream of the union or connector. The shut-off valve must be located within six feet of a cooking appliance and within three feet of any other appliance. A shut-off valve may serve more than one appliance if located as required above.

(2) Shut-off valves used in connection with gas piping must be of a type designed for use with liquefied petroleum gas. Shut-off valves must be tested and approved to ANSI Z21.15 standard or equal.

[]

NEW SECTION

WAC 296-150C-1759  What requirements apply to testing for gas piping leaks before vendor unit appliances are connected? (1) The piping system must stand a pressure of at least ten psi gauge for a period of not less than fifteen minutes without showing any drop in pressure.

(2) Pressure must be measured with a gauge calibrated to be read in increments of not greater than one-tenth pound.

(3) The source of pressure must be isolated before the pressure tests are made. Before a test is begun, the temperature of the ambient air and of the piping must be approximately the same, and constant air temperature must be maintained throughout the test.

[]

NEW SECTION

WAC 296-150C-1760  What requirements apply to testing for gas piping leaks after vendor unit appliances are connected? (1) After gas appliances have been connected, the gas-piping system must be subjected to a pressure test with the burner valves closed. The test consists of air at not less than ten inches nor more than fourteen inches pressure of water column (six to eight ounces). The system must hold this pressure for a period of not less than ten minutes with no leakage. Before beginning the test, the temperature of the gas-piping system and the test air must be equalized, and this shall be maintained throughout the test.

(2) Appliance shut-off valves ahead of gas cooking appliances may be closed for the performance of this test. When the test is satisfactorily performed, these valves must be opened and, while the system is under pressure, the appliance connectors must be tested with an approved leak detector or approved bubble solution.

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REPEALER

The following section of the Washington Administrative Code is repealed:

WAC 296-150C-0980 Wall coverings.

AMENDATORY SECTION (Amending WSR 96-21-146, filed 10/23/96, effective 11/25/96)

WAC 296-150F-0020  What definitions apply to this chapter? "Approved" is approved by the department of labor and industries.

"Building site" is a tract, parcel, or subdivision of land on which a factory-built house or commercial structure will be installed.

"Closed construction" is a factory-built house, commercial structure, or component that is not open for visible inspection at the building site. It may enclose factory-installed structural, mechanical, electrical, plumbing, or other systems and equipment.

"Commercial structure" is a structure designed or used for human habitation (such as a dormitory) or human occupancy for industrial, educational, assembly, professional, or commercial purposes. It may also include a component.

"Component" is a discrete element that cannot be inspected at the time of installation either in the factory or in a site-built unit, but is:

Designed to be installed in a structure;

Manufactured as a unit; and

Designed for a particular function or group of functions.

A component may be a floor, wall panel, roof panel, plumbing wall, electrical service wall, or heating assembly.

It may also be a service core. A service core is a factory assembled, three-dimensional section of a building. It may include mechanical, electrical, plumbing, and related systems. It may be a complete kitchen, bathroom, or utility room. Service cores are referred to as "wet boxes," "mechanical cores," or "utility cores."

Note: A roof truss is not considered a component.

"Damaged in transit" is damage that effects the integrity of the structural design or damage to any other system referenced in the codes required by the State Building Code, or other applicable codes.

"Department" is the department of labor and industries. The department may also be referred to as "we" or "us" in this chapter. Note: You may contact us at: Department of Labor and Industries, Specialty Compliance, PO Box 44440, Olympia, WA 98504-4440.

"Design plan" is a plan for the construction of factory-built housing, commercial structures, or components that includes floor plans, elevation drawings, specifications, engineering data, or test results necessary for a complete evaluation of the design.

"Design option" is a design that a manufacturer may use as an option to its design plan.

"Equipment" is all material, appliances, devices, fixtures, fittings, or accessories used in the manufacture, assembly, installation, or alteration of factory-built housing, commercial structures, and components.

"Factory assembled structure (FAS) advisory board" is a board authorized to advise the director of the department regarding the issues and adoption of rules relating to factory-built housing, commercial structures and components. (See RCW 43.22.420.)

"Factory-built housing" is housing designed for human occupancy such as a single-family dwelling. The structure of any room is entirely or substantially prefabricated or assembled at a place other than a building site. It may also include a component. A factory-built house is also referred to as a "modular" structure. Factory-built housing does not include manufactured (mobile) housing. (See RCW 43.22.450(3).)

"Insignia" is a label that we attach to a structure to verify that a factory-built house or commercial structure meets the requirements of this chapter. It could also be a stamp or label attached to a component to verify that it meets the requirements of this chapter. ((See also the definition for temporary insignia.))

"Install" is to erect or set in place a structure at a building site. It may also be the construction or assembly of a component as part of a factory-built house or commercial structure.

"Listed" is a piece of equipment, a component, or an installation that appears in a list published by a testing or listing agency and is suitable for use in a specified manner.

"Listing agency" is an organization whose business is approving equipment, components, or installations for publication.

"Local enforcement agency" is an agency of city or county government with power to enforce local regulations governing the installation of factory-built housing and commercial structures.

"Master design plan" is a design plan that expires when a new State Building Code has been adopted.

"Manufacturing" is making, fabricating, forming, or assembling a factory-built house, commercial structure, or component.

"One-year design plan" is a design plan that expires one year after approval or when a new State Building Code has been adopted.

"Repair" is the replacement, addition, modification, or removal of any construction, equipment, system, or installation to correct damage in transit or during on-site installation before occupancy.

(("Temporary insignia" is a label that we attach to a structure to verify that the factory-built house or commercial structure meets the requirements of this chapter. A temporary insignia is used when the final destination of a structure has not been determined. This temporary insignia must be replaced with a permanent insignia prior to delivery of the structure to a building site. Fees for temporary insignia or their replacement with permanent insignia are shown in WAC 296-150F-3000.))

"Unit" is a factory-built house, commercial structure, or component.

[Statutory Authority: RCW 43.22.340, [43.22.]355, [43.22.]360, [43.22.]432, [43.22.]440 and [43.22.]480. 96-21-146, § 296-150F-0020, filed 10/23/96, effective 11/25/96.]

NEW SECTION

WAC 296-150F-0130  How do I register a complaint? A person who believes that a structure or component does not meet the requirements of this chapter may register a complaint with the department. The complaint must be in writing and must specifically describe the alleged violations of this chapter. Upon receipt of the complaint, the department will forward a copy to the appropriate manufacturer and/or dealer and they shall have thirty days to respond to it. If the department determines that an inspection is necessary, the manufacturer/dealer shall pay the department for the cost of the inspection. The cost of the inspection is based upon the fee schedule in WAC 296-150F-3000 and includes the hourly inspection fee, travel costs and other expenses incurred as a result of the inspection.

[]

AMENDATORY SECTION (Amending WSR 96-21-146, filed 10/23/96, effective 11/25/96)

WAC 296-150F-0200  Who must purchase factory-built housing and commercial structure insignia? (1) You must obtain insignia from us for each factory-built house ((and)), commercial structure and component sited in Washington state.

(2) ((You do not need to purchase our insignia if you manufacture factory-built housing and commercial structure in Washington for sale outside the state.)) If you are a Washington state manufacturer, you do not need to purchase our insignia for your factory-built housing, commercial structures and components sold outside of Washington state.

(3) You must have an approved design plan and have passed inspection before an insignia can be attached to your factory-built home or commercial structure by us or our authorized agent.

(4) If a unit is damaged in transit after leaving the manufacturing location or during an on-site installation, and a repair is necessary, you must purchase an insignia from us. The insignia indicates that the unit was repaired.

[Statutory Authority: RCW 43.22.340, [43.22.]355, [43.22.]360, [43.22.]432, [43.22.]440 and [43.22.]480. 96-21-146, § 296-150F-0200, filed 10/23/96, effective 11/25/96.]

AMENDATORY SECTION (Amending WSR 96-21-146, filed 10/23/96, effective 11/25/96)

WAC 296-150F-0210  What are the insignia requirements? (1) If you are applying for insignia for factory-built housing ((and)), commercial structures and components you must have your design plan approved and your units and components inspected and approved by us.

(2) We will attach the insignia after:

(a) We receive the required forms and fees from you (see WAC 296-150F-3000); and

(b) Your unit or component has passed final inspection. (See WAC 296-150F-0500.)

[Statutory Authority: RCW 43.22.340, [43.22.]355, [43.22.]360, [43.22.]432, [43.22.]440 and [43.22.]480. 96-21-146, § 296-150F-0210, filed 10/23/96, effective 11/25/96.]

AMENDATORY SECTION (Amending WSR 96-21-146, filed 10/23/96, effective 11/25/96)

WAC 296-150F-0460  What information must a manufacturer provide when a professional or firm does the design plan approval? You must provide the following information with your approved design plan:

(1) A completed departmental design plan approval request form;

(2) Two or more sets of the design plans plus elevation drawings, specifications, engineering analysis, and test results and procedures necessary for a complete evaluation of the design. These design plans must have an original wet stamp, be signed, and dated by the approving professional(s) (see WAC 296-150F-0340 and 296-150F-0350);

(3) A cover sheet on the design plan noting which professional approved each portion of the design plan;

(4) A copy of the authorization letter from us;

(5) The design plan fee for design plans approved by professionals or firms (see WAC 296-150F-3000); ((and))

(6) A professional who designs and certifies that the factory-built home or commercial structure design meets state requirements cannot also approve the design plan in the plan approval process;

(7) A professional cannot approve those electrical designs listed in WAC 296-150F-0310(2); and

(8) A professional cannot approve plans submitted under a reciprocal agreement.

[Statutory Authority: RCW 43.22.340, [43.22.]355, [43.22.]360, [43.22.]432, [43.22.]440 and [43.22.]480. 96-21-146, § 296-150F-0460, filed 10/23/96, effective 11/25/96.]

AMENDATORY SECTION (Amending WSR 96-21-146, filed 10/23/96, effective 11/25/96)

WAC 296-150F-0500  When is an inspection required? (1) Before we issue an insignia, each factory-built house, commercial structure, and component must be inspected at the manufacturing location as many times as are required by the codes. (See WAC 296-150F-0600.) Inspections may include:

(a) A "cover" inspection during construction of the unit before the electrical, plumbing, mechanical, and structural systems are covered;

(b) Insulation and vapor barrier inspection, if required;

(c) Other required code inspections;

(d) A final inspection after the factory-built house, commercial structure, or component is complete;

Note: Each factory-built house, commercial structure, and component must have a serial number to enable us to track inspections.

(2) If we discover a violation during inspection, we will issue a notice of noncompliance. You can correct the violation during the inspection. If you cannot correct the violation during inspection, you must leave the item uncovered until we approve your correction.

(3) After a unit is manufactured but before occupancy, we must inspect a factory-built house or commercial structure if it is damaged in transit to the building site or during on-site installation. This is considered a repair inspection. (See WAC ((296-150F-0240)) 296-150F-0540.)

(4) Approved design plans((, specifications, engineering analysis or test results must be available during the inspections)) must be available in compliance with the applicable sections of adopted state codes.

(5) Once your unit is inspected and approved we will attach the insignia.

Note: We only inspect factory-built housing and commercial structures before occupancy. After occupancy, the local enforcement agency is the inspection agency.

[Statutory Authority: RCW 43.22.340, [43.22.]355, [43.22.]360, [43.22.]432, [43.22.]440 and [43.22.]480. 96-21-146, § 296-150F-0500, filed 10/23/96, effective 11/25/96.]

AMENDATORY SECTION (Amending WSR 96-21-146, filed 10/23/96, effective 11/25/96)

WAC 296-150M-0020  What definitions apply to this chapter? "Alteration" is the replacement, addition, modification, or removal of any equipment or installation that affects the construction, planning considerations, fire safety, or the plumbing, mechanical, and electrical systems of a manufactured home. The installation of whole-house water treatment equipment that requires cutting into the existing plumbing is considered an alteration and requires a permit, an inspection and an alteration insignia.

The following are not considered alterations:

Repairs to equipment with approved parts; or

Modification of a fuel-burning appliance according to the listing agency's specifications; or

Adjustment and maintenance of equipment.

"Alteration insignia" is an insignia issued by the department of labor and industries to verify that an alteration to a manufactured home meets the requirements of federal law 24 CFR 3280 and this chapter.

"Anchoring system" is the means used to secure a mobile home to ground anchors or to other approved fastening devices. It may include straps, cables, turnbuckles, bolts, fasteners, and other components.

"ANSI" is the American National Standards Institute, Inc., and the institute's rules applicable to manufactured homes, ANSI A225.1 Manufactured Homes Installation, 1994 edition, except section 3.5.2 - Ground Cover and section 4.1.3.3 - Clearance.

"Authority having jurisdiction" means that either the department of labor and industries or the local jurisdiction is responsible for establishing specific manufactured home standards. The authority for specific manufactured home standards is divided as follows:

The department of labor and industries establishes standards for manufactured home installation and alterations and performs alteration inspections;

The local jurisdiction establishes standards for manufactured homes governing the building site and performs installation inspections.

"Building site" is a tract, parcel, or subdivision of land on which a manufactured home is installed.

"DAPIA" is a Design Approval Primary Inspection Agency as approved by the United States Department of Housing and Urban Development.

"Department" is the department of labor and industries. The department may be referred to as "we" or "us" in this chapter. Note: You may contact us at: Department of Labor and Industries, Specialty Compliance, PO Box 44440, Olympia, WA 98504-4440.

"Design plan" is a design submitted to the department for approval of a manufactured home structural alteration.

"Equipment" is all material, appliances, devices, fixtures, fittings, or accessories used in the alteration or installation of a manufactured home.

"Footing" is the portion of a support system that transmits loads from the manufactured home to the ground.

"Foundation skirting" or "skirting" is the material that surrounds and encloses the space under the manufactured home.

"Homeowner" is an individual who owns a manufactured home for the purposes of this chapter.

"HUD" is the United States Department of Housing and Urban Development with headquarters located in Washington, D.C.

"Installation" is the activity needed to prepare a building site and to set a manufactured home within that site. Site means a tract, parcel, or subdivision of land including a mobile home park.

"IPIA" is a manufactured home production Inspection Primary Inspection Agency approved by the United States Department of Housing and Urban Development. The department of labor and industries is the IPIA for Washington state.

"Local enforcement agency" is an agency of city or county government with power to enforce local regulations governing the building site and installation of a manufactured home.

"Manufactured home" is a single-family dwelling built according to the Department of Housing and Urban Development Manufactured Home Construction and Safety Standards Act, which is a national, preemptive building code. A manufactured home also:

Includes plumbing, heating, air conditioning, and electrical systems;

Is built on a permanent chassis; and

Can be transported in one or more sections with each section at least eight feet wide and forty feet long when transported; or when installed on the site is three hundred twenty square feet or greater (see RCW 46.04.302).

Note: Total square feet is based on exterior dimensions measured after installation using the longest horizontal projections. Dimensions may not include bay windows but may include projections containing interior space such as cabinets and expandable rooms.

"Mobile home" is a factory-built dwelling built prior to June 15, 1976, to standards other than the HUD Code, and acceptable under applicable state codes in effect at the time of construction or introduction of the home into the state. Mobile homes have not been built since the introduction of the HUD Manufactured Home Construction and Safety Standards Act. For the purposes of this chapter references to manufactured homes include mobile homes.

"Park site" is the installation location of a manufactured home within a residential area for manufactured homes.

"Structural alteration-custom design" is a design that can only be used once.

"Structural alteration-master design" is a design plan that can be used more than once. The master plan expires when there is a code change applicable to the design.

"System" is part of a manufactured home designed to serve a particular function such as structural, plumbing, mechanical, or electrical functions.

[Statutory Authority: RCW 43.22.340, [43.22.]355, [43.22.]360, [43.22.]432, [43.22.]440 and [43.22.]480. 96-21-146, § 296-150M-0020, filed 10/23/96, effective 11/25/96.]

NEW SECTION

WAC 296-150M-0306  What codes are used when altering a manufactured (mobile) home? Alterations to a manufactured (mobile) home must be in compliance with the Manufactured Home Construction and Safety Standards, Part 24, CFR 3280, as adopted by the Secretary for the Department of Housing and Urban Development (HUD) and the amendments to that federal standard adopted in this WAC chapter.

(1) The Department will accept mix and match air conditioning/heat pump components that have been tested and listed for use with a particular furnace by a nationally recognized testing laboratory.

(2) The Department will accept pellet stoves for installation that have been listed by a Department approved testing laboratory. For a current list of approved laboratories, contact any Department Field Office or the Department at the address shown in WAC 296-150M-0020.

[]

NEW SECTION

WAC 296-150M-0307  How may I obtain a copy of the Manufactured Home Construction and Safety Standards, Part 24, CFR 3280? Copies of the federal standard may be obtained by writing to:

Director

Manufactured Housing Standards Division

Department of Housing and Urban Development

451 Seventh Street Southwest

Washington, D.C. 20410

[]

AMENDATORY SECTION (Amending WSR 96-21-146, filed 10/23/96, effective 11/25/96)

WAC 296-150M-0310  What happens if I fail to get your approval prior to altering a manufactured home? (1) If you alter a manufactured home without getting our approval and an alteration insignia, ((we may remove your Washington state insignia or HUD label and)) your manufactured (mobile) home cannot be sold or leased.

(2) We may remove any Washington state insignia(s) attached to your manufactured (mobile) home.

[Statutory Authority: RCW 43.22.340, [43.22.]355, [43.22.]360, [43.22.]432, [43.22.]440 and [43.22.]480. 96-21-146, § 296-150M-0310, filed 10/23/96, effective 11/25/96.]

NEW SECTION

WAC 296-150M-0331  Does my alteration permit expire? Yes, your alteration permit will expire one year after the date of purchase. Alteration permits purchased prior to January 1, 1998, will expire on December 31, 1998. Alteration permits purchased after January 1, 1998, will expire one year after the date of purchase.

[]

AMENDATORY SECTION (Amending WSR 96-21-146, filed 10/23/96, effective 11/25/96)

WAC 296-150M-0400  How do I apply for alteration approval and obtain an alteration insignia? (1) To apply for alteration approval and the alteration insignia, you must:

(a) Complete an alteration permit form and an application for alteration insignia. We will provide the forms upon request.

(b) Submit the completed forms to us, with the first hour of inspection fee and alteration insignia fee. Alterations requiring more than one inspection shall have the first hour inspection fee paid to the department prior to any inspection. (See WAC 296-150M-3000.)

(2) Request inspection of your alteration at least five days before the date you want the inspection.

(3) Once we approve your alteration, we will attach the alteration insignia to your manufactured home.

Note: Specifications, engineering data, and test results should be available for our inspector. If applicable, your approved design plan must also be available during the inspection.

[Statutory Authority: RCW 43.22.340, [43.22.]355, [43.22.]360, [43.22.]432, [43.22.]440 and [43.22.]480. 96-21-146, § 296-150M-0400, filed 10/23/96, effective 11/25/96.]

AMENDATORY SECTION (Amending WSR 96-21-146, filed 10/23/96, effective 11/25/96)

WAC 296-150M-0600  Who establishes standards for installation of manufactured homes? (1) The director of labor and industries is responsible for establishing uniform installation standards where possible and practical for persons or entities engaged in performing the installation of manufactured homes within the state.

(2) Local jurisdictions may adopt additional installation requirements only for those ((special situations in hazardous areas as defined in WAC 296-150M-0620)) installation situations not covered by federal standards. For example, local jurisdictions may impose noise control construction ordinances, prescribe the frost depth and soil bearing capacity at the installation site, and adopt requirements to protect manufactured homes in hazardous areas, i.e., in flood and earthquake areas (see WAC 296-150M-0620).

Also, local jurisdictions may impose their requirements for snow and wind loads as long as all structures within their jurisdiction are required to comply with the same standard and provided those installing the manufactured home are given options in satisfying that standard. Such an option might include, but not be limited to, allowing an installer to erect an additional structure, which meets local standards, and protects the manufactured home. For example, an installer could erect a free standing ramada over a manufactured home to protect it from local snow loads.

Local jurisdictions may not:

(a) Dictate foundation construction which is built according to either the manufacturer's installation instructions or a design created by an engineer or architect licensed in Washington state.

(b) Impose regulations on smoke detectors because they are regulated by federal standards.

[Statutory Authority: RCW 43.22.340, [43.22.]355, [43.22.]360, [43.22.]432, [43.22.]440 and [43.22.]480. 96-21-146, § 296-150M-0600, filed 10/23/96, effective 11/25/96.]

AMENDATORY SECTION (Amending WSR 96-21-146, filed 10/23/96, effective 11/25/96)

WAC 296-150M-0610  What instructions are used for a manufactured home installation? The following instructions must be used for an initial or relocated manufactured home installation (note: The specific instructions in this chapter take precedence over manufacturer's instructions and ANSI standards):

(1) Installation of a new manufactured home.

(a) The initial manufactured home installation must be conducted according to the manufacturer's instructions.

(b) If the manufacturer's instructions do not address an aspect of the installation, you may request:

(i) Specific instructions from the manufacturer; or

(ii) Specific instructions from a professional engineer or architect licensed in Washington state.

For example: (A) A manufactured home is installed over a basement and the manufacturer's instructions do not address this application;

(B) A manufactured home is installed on a site where the specific soil bearing capacity is not addressed in the manufacturer's instructions.

(c) ((A manufactured home must be anchored per the manufacturer's installation instructions or per the design of a professional engineer or architect licensed in Washington.)) All manufactured homes installed in Washington state must be permanently anchored except for those installed on dealer lots. On dealer lots, temporary sets are permitted without anchoring being installed. A manufactured home must be anchored according to the manufacturer's installation instructions or according to the design of a professional engineer or architect licensed in Washington state. Local jurisdictions may not prescribe anchoring methods.

(d) A manufactured home must have a skirting around its entire perimeter. It must be installed per the manufacturer's installation instructions or if the manufacturer is not specific, to the standards in this section. It must be vented and allow access to the under floor area per the manufacturer's installation instructions or per the standards ((in subsection (3) of this section)) below if the manufacturer's instructions are not available.

If the manufacturer's skirting and access instructions are not specific, skirting, ventilation and access shall be installed as follows:

(i) Skirting:

Skirting must be made of materials suitable for ground contact.

Metal fasteners must be made of galvanized, stainless steel or other corrosion resistant material.

Ferrous metal members in contact with the earth, except those made of galvanized or stainless steel, must be coated with an asphaltic emulsion.

Skirting must not trap water between the skirting and siding or trim.

All skirting must be recessed behind the siding or trim.

(ii) Ventilation:

For homes sited in a flood plain, contact the local jurisdiction regarding proper skirting ventilation. Except for those manufactured homes sited in a flood plain, all skirting must be vented as follows:

Vent openings must be covered with corrosion-resistant wire mesh to prevent the entrance of rodents. The size of the mesh opening cannot exceed 1/4 inch.

Vent openings must have a net area of not less than one square foot for each one hundred fifty square feet of under floor area.

Vent openings must be located as close to corners and high as practical and they must provide cross ventilation on at least two opposite sides.

(iii) Access:

Access to the under floor area of a manufactured home must have a finished opening at least eighteen inches by twenty-four inches in size.

The access opening must be located so that all areas under a manufactured home are available for inspection.

The access opening must be covered and that cover must be made of metal, pressure treated wood or vinyl.

(e) A manufactured home site must be prepared per the manufacturer's installation manual or per ANSI A225.1, 1994 edition, section 3.

(f) Heat duct crossovers must be installed per the manufacturer's installation instruction manual or per ((the standards in subsection (6) of this section)) ANSI A225.1 or the following instructions if the manufacturer's instructions are not available:

Heat duct crossovers must be supported at least one inch above the ground by strapping or blocking. They must be installed to avoid standing water. Also, they must be installed to prevent compression, sharp bends and to minimize stress at the connections.

(g) Dryer vents must exhaust to the exterior side of the wall or skirting. Dryer ducts outside the manufactured home shall comply with the dryer manufacturer's specifications or shall be made of metal with smooth interior surfaces.

(h) Hot water tank pressure relief lines must exhaust to the exterior side of the exterior wall or skirting and must exhaust downward. The end of the pipe must be at least six inches but not more than two feet above the ground.

(i) Water piping must be protected against freezing as per the manufacturer's installation instructions or by use of a heat tape listed for use with manufactured homes and installed per the heat tape manufacturer's installation instructions.

(j) The testing of water lines, waste lines, gas lines and electrical systems must be as per the manufacturer's installation instructions ((or per HUD standard CFR 3280)). If the manufacturer's installation instructions require testing of any of these systems, the local jurisdiction is responsible for verifying that the tests have been performed and passed. Electrical connections and testing are the responsibility of the electrical section of labor and industries except where a city has assumed the electrical inspection responsibilities for their jurisdiction. In that case, the city's electrical inspectors are responsible for the electrical connections and testing.

(k) During the installation process, a ground cover must be installed under all manufactured homes. The ground cover must be a minimum of six-mil black polyethylene sheeting or its equivalent (exception to ANSI A225.1 (3.5.2)). The ground cover may be omitted if the under floor area of the home has a concrete slab floor with a minimum thickness of three and one-half inches.

(l) Clearances underneath manufactured homes must be maintained at a minimum of eighteen inches beneath at least seventy-five percent of the lowest member of the main frame (I-beam or channel beam) and the ground or footing. No more than twenty-five percent of the lowest member of the main frame of the home shall be less than eighteen inches above the ground or footing. In no case shall clearance be less than twelve inches anywhere under the home (exception to ANSI A225.1 (4.1.3.3)).

(m) Heat pump and air conditioning condensation lines must be extended to the exterior of the manufactured home.

(2) ((Relocation installation of a manufactured home.)) Installation of a relocated manufactured (mobile) home.

(a) A relocated manufactured home installation should be conducted according to the manufacturer's installation instructions.

(b) If the manufacturer's instructions are unavailable, you may use either:

(i) The American National Standard Institute (ANSI) standard ANSI A225.1-Manufactured Homes Installation, 1994 edition instructions; or

(ii) The instructions of a professional engineer or architect licensed in Washington state.

(c) ((A manufactured home must be anchored per the manufacturer's installation instructions. If the manufacturer's installation instructions are not available, you may use:

(i) The American National Standards Institute (ANSI) standard ANSI A225.1 - Manufactured Homes Installation, 1994 edition instructions; or

(ii) The instructions of a professional engineer or architect licensed in Washington state.

(d) A manufactured home must have a skirting around its entire perimeter. It must be installed per the manufacturer's installation instructions or if the manufacturer is not specific, to the standards in subsection (3) of this section.

(e) A manufactured home site must be prepared per the manufacturer's installation manual or per ANSI A225.1, 1994 edition, section 3.

(f) Heat duct crossovers must be installed per the manufacturer's installation manual, ANSI A225.1, 1994 edition, or per subsection (6) of this section.

(g) Dryer vents must exhaust to the exterior side of the wall or skirting.

(h) Hot water tank pressure relief lines must exhaust to the exterior side of the exterior wall or skirting and must exhaust downward.

(i) Water piping must be protected against freezing as per the manufacturer's installation instructions or per ANSI A225.1, section 8.

(j) The testing of water lines, waste lines, gas lines and electrical systems must be per the manufacturer's installation instructions or per HUD standard CFR 3280.

(3) Skirting must be of materials suitable for ground contact. Metal fasteners must be galvanized, stainless steel or other corrosion resistant material. Ferrous metal members in contact with the earth, other than those that are galvanized or stainless steel, must be coated with an asphaltic emulsion. Skirting must not be attached in such a manner that can cause water to be trapped between the skirting and siding or trim. The skirting must be recessed behind the siding or trim.

(4) The skirting must be vented as follows except for manufactured homes sited in a flood plain. For homes sited in a flood plain, contact the local jurisdiction for proper ventilation. Skirting must be vented by openings protected from the entrance of rodents by being covered with corrosion-resistant wire mesh with mesh openings of 1/4 inch in dimension. Such openings must have a net area of not less than one square foot for each one hundred fifty square feet of under floor area. Ventilation openings must be located as close to corners and as high as practical. Openings must be located to provide cross-ventilation on at least two opposite sides.

(5) Access to the under floor area of the manufactured home must have an opening not less than 18" x 24" and must be located so that all areas under the manufactured home are available for inspection. The cover must be of metal, pressure treated wood or vinyl.

(6) Heat duct crossovers installed to the standards in this section must be supported above the ground by strapping or blocking and be installed to avoid standing water. Heat ducts must also be installed to prevent compression and sharp bends and to minimize stress at the connections.)) If either (b)(i) or (ii) is used, all of the requirements of WAC 296-150M-0610 (1)(c) through (m) must also be followed.

[Statutory Authority: RCW 43.22.340, [43.22.]355, [43.22.]360, [43.22.]432, [43.22.]440 and [43.22.]480. 96-21-146, § 296-150M-0610, filed 10/23/96, effective 11/25/96.]

AMENDATORY SECTION (Amending WSR 96-21-146, filed 10/23/96, effective 1/25/96)

WAC 296-150M-0620  Do local enforcement agencies have special requirements for installing manufactured homes in hazardous areas? (1) Local enforcement agencies may have special installation requirements for manufactured homes installed in hazardous areas.

(2) A hazardous area is:

(a) An area recognized as a flood plain by the local jurisdiction; or

(b) An area considered hazardous due to the probability of earthquake. ((We recommend that in an earthquake area you use additional measures designed by an engineer to minimize the potential effects caused by an earthquake.)) In such areas, local jurisdictions may require an earthquake resistant bracing system designed for the earthquake zone in which the home is located by the home manufacturer or by a registered professional engineer or architect.

[Statutory Authority: RCW 43.22.340, [43.22.]355, [43.22.]360, [43.22.]432, [43.22.]440 and [43.22.]480. 96-21-146, § 296-150M-0620, filed 10/23/96, effective 11/25/96.]

AMENDATORY SECTION (Amending WSR 96-21-146, filed 10/23/96, effective 11/25/96)

WAC 296-150M-0640  Does a person who installs a manufactured home need an installation permit? (1) Any person who installs a manufactured home must obtain an installation permit from the local enforcement agency prior to installation.

(2) Any permit fees set by the local enforcement agency must be paid in full and included with the permit application.

(3) A dealer ((shall)), owner or agent must not deliver a manufactured home to its site without verifying that an installation permit has been obtained.

[Statutory Authority: RCW 43.22.340, [43.22.]355, [43.22.]360, [43.22.]432, [43.22.]440 and [43.22.]480. 96-21-146, § 296-150M-0640, filed 10/23/96, effective 11/25/96.]

AMENDATORY SECTION (Amending WSR 96-21-146, filed 10/23/96, effective 11/25/96)

WAC 296-150M-0660  What are the requirements for on-site structures and who regulates them? On-site structures, sometimes referred to as auxiliary structures, such as, but not limited to, carports, decks and steps should be self-supporting.

(1) Local enforcement agency jurisdiction.

(a) On-site self-supporting structures that do not use any of the systems in the manufactured home are inspected by the local enforcement agency and they should be contacted for specific on-site structure requirements.

(b) Awnings and carports that are self-supported by a beam next to a manufactured (mobile) home are inspected by the local enforcement agency. Note: The awning or carport may be flashed to the manufactured (mobile) home.

(2) Department of Labor and Industries jurisdiction.

(a) On-site structures that are not self-supporting or use one or more of the systems of the manufactured home require an inspection by us and by the local enforcement agency.

(b) Awnings and carports that are attached to the manufactured (mobile) home without the benefit of a self-supported beam require approval and inspection by the Department. Note: This attachment must be designed and approved by an engineer or an architect licensed in Washington state. Furthermore, these stamped plans must be submitted to the Department and approved before an inspection can be conducted.

(c) Attached garages:

(i) If the manufactured (mobile) home is built "garage ready" (one hour fire wall, dormer, etc.) at the factory and is installed by the manufacturer, an alteration inspection may not be required.

(ii) If the manufactured (mobile) home is not built "garage ready" at the factory, an alteration inspection is required for all changes made to it.

[Statutory Authority: RCW 43.22.340, [43.22.]355, [43.22.]360, [43.22.]432, [43.22.]440 and [43.22.]480. 96-21-146, § 296-150M-0660, filed 10/23/96, effective 11/25/96.]

REPEALER

The following sections of the Washington Administrative Code are repealed:

WAC 296-150M-0700 Acceptable types of ground cover.

WAC 296-150M-0710 Clearance under manufactured homes.

WAC 296-150M-0730 Heat pump.