WSR 19-16-158
PROPOSED RULES
BUILDING CODE COUNCIL
[Filed August 7, 2019, 11:09 a.m.]
Original Notice.
Preproposal statement of inquiry was filed as WSR 18-09-087.
Title of Rule and Other Identifying Information: Chapter 51-50 WAC, Adoption and amendment of the 2018 International Building Code.
Hearing Location(s): On September 13, 2019, at 10:00 a.m., at the CenterPlace Regional Event Center, 2426 North Discovery Place, Spokane Valley, WA 99216; and on September 27, 2019, at 10:00 a.m., at the Department of Enterprise Services, Presentation Room (1213), 1500 Jefferson Street, Olympia, WA 98504.
Date of Intended Adoption: November 8, 2019.
Submit Written Comments to: Doug Orth, 1500 Jefferson Street S.E., Olympia, WA 98504, email SBCC@des.wa.gov, by September 27, 2019.
Assistance for Persons with Disabilities: Contact Carrie Toebbe, phone 360-407-9255, email carrie.toebbe@des.wa.gov, by September 4, 2019.
Purpose of the Proposal and Its Anticipated Effects, Including Any Changes in Existing Rules: The proposed rules adopt the 2018 edition of the International Building Code (IBC), published by the International Code Council (ICC), with state amendments to incorporate proposed changes as adopted by the Washington state building code council (SBCC). The rules will provide increased clarity and life safety measures for building construction in Washington state.
SUMMARY OF PROPOSED CHANGES
2018 IBC
Amendments to Chapter 51-50 WAC*
| WAC | Section | Changes in 2018 | Discussion |
1 | 51-50-0403 | 403.5.4 | Smokeproof enclosures | Addresses high-rise buildings. |
2 | 51-50-0405 | 405.7.2 | Smokeproof enclosures | Addresses underground buildings. |
3 | 51-50-0412 | 412.2.2.1 | Stairways | Addresses airport traffic control towers. |
4 | 51-50-0504 | 504.4.1 | Stair enclosure pressurization increase | Coordinates reference code sections. |
5 | 51-50-0909 | 909.6.3 | Pressurized stairways and elevator hoistways | Specifies which sections of section 909 apply for various conditions. |
6 | 51-50-1023 | 1023.11 | Smokeproof enclosures | Addresses interior pressurized systems. |
7 | 51-50-3006 | 3006.3 | Hoistway opening protection | Coordinates reference code sections. |
*Note: | Those not listed on the table above remain as adopted in 2015. |
Rule is not necessitated by federal law, federal or state court decision.
Name of Proponent: SBCC, governmental.
Name of Agency Personnel Responsible for Drafting and Implementation: Richard Brown, 1500 Jefferson Street S.E., Olympia, WA 98504, 360-407-9277; and Enforcement: Local jurisdiction having authority.
A school district fiscal impact statement is not required under RCW
28A.305.135.
A cost-benefit analysis is required under RCW
34.05.328. A preliminary cost-benefit analysis may be obtained by contacting Richard Brown, 1500 Jefferson Street S.E., Olympia, WA 98504, phone 360-407-9277, email
Richard.brown@des.wa.gov.
The proposed rule does impose more-than-minor costs on businesses. There are costs imposed by the proposed rules but the costs do not fall disproportionately on small businesses. These rules will not affect the distribution of impacted work, whether by small businesses or not, doing the work. The rules do not affect employment, reporting or recordkeeping.
Small Business Economic Impact Statement
Description: SBCC is filing a proposed rule to the updated 2018 edition of IBC (chapter 51-50 WAC). Since 1985 SBCC has been responsible to update to new editions of the Building Code per RCW
19.27.074. IBC and the International Existing Building Code are updated every three years by ICC. The code development process conducted by the model code organization is open to all interest groups within the design and construction industry and from governmental organizations. See
www.iccsafe.org for more information about the model code development process.
The administrative compliance requirements are under the authority of the local government, RCW
19.27.050. Compliance activities including permit issuance, plan review and approval, and inspections occur at the local level. Requirements for construction document submittal and other reporting requirements are determined by the local jurisdiction and are consistent with previously established policies. The proposed amendments to chapter 51-50 WAC include specific technical requirements for building construction to be consistent statewide.
Professional Services: Washington has had a statewide Building Code in effect since 1974. The local enforcement authority having jurisdiction administers the codes through the building and/or fire departments. Administrative procedures for state Building Code compliance are established and will not be changed by the adoption of the update to the current building codes. Small businesses will employ the same types of professional services for the design and construction of buildings and systems to comply with the state Building Code.
The proposed rule updates the state Building Code and does not require additional equipment, supplies, labor or other services. Services needed to comply with the Building Code are existing within the construction industry as required by the local authority having jurisdiction.
Costs of Compliance for Businesses: The cost of compliance incurred by Washington businesses includes training and educational materials. IBC 2018 model code costs $102 + tax, shipping and handling. These publications are also available online at http://codes.iccsafe.org/I-Codes.html. ICC chapters offer training for continuing education credits to architects, engineers and building inspectors for $285 (in 2016).
The Building Code technical advisory group determined there is not a cost for compliance on businesses. The changes represent clarification of an existing statewide amendment.
Loss of Sales or Revenue: No impact.
Cost of Compliance for Small Businesses (determine whether the proposed rule will have a disproportionate cost impact on small businesses, compare the cost of compliance for small business[es] with the cost of compliance for the ten percent of businesses that are the largest businesses): No impact.
Reducing the Costs of the Rule on Small Businesses: Not applicable.
Small Businesses Involved in the Development of the Rule: SBCC considered these amendments at an SBCC public hearing.
List of Industries: Below is a list of industries required to comply with the Building Code:
North American Industry Classification System (NAICS) Code | NAICS Code Definition | Number of Establishments in Washington State | TOTAL Annual Payroll | TOTAL Annual Revenue | AVG Annual Payroll | AVG Annual Revenue | 1% of Avg Annual Payroll | 0.3% of Avg Annual Revenue |
236115 | New single-family housing construction (except for-sale builders) | 1261 | $186,272,000 | --- | $147,718 | --- | $1,477 | --- |
236116 | New multifamily housing construction (except for-sale builders) | 45 | $54,622,000 | --- | $1,213,822 | --- | $12,138 | --- |
236118 | Residential remodelers | 2777 | $318,180,000 | $1,536,217,000 | $114,577 | $553,193 | $1,146 | $1,660 |
236210 | Industrial building construction | 53 (s) | $99,790,000 | --- | --- | --- | --- | --- |
236220 | Commercial and institutional building construction | 862 | $772,473,000 | $6,925,925,000 | $896,140 | $8,034,716 | $8,961 | $24,104 |
238110 | Poured concrete foundation and structure contractors | 511 | $144,643,000 | $479,256,000 | $283,059 | $937,879 | $2,831 | $2,814 |
238120 | Structural steel and precast concrete contractors | 68 | $93,454,000 | $336,100,000 | $1,374,324 | $4,942,647 | $13,743 | $14,828 |
238130 | Framing contractors | 417 | $79,196,000 | $279,226,000 | $189,918 | $669,607 | $1,899 | $2,009 |
238140 | Masonry contractors | 293 | $74,067,000 | $215,274,000 | $252,788 | $734,724 | $2,528 | $2,204 |
238150 | Glass and glazing contractors | 141 | $67,626,000 | $237,985,000 | $479,617 | $1,687,837 | $4,796 | $5,064 |
238160 | Roofing contractors | 537 | $179,942,000 | $660,911,000 | $335,088 | $1,230,747 | $3,351 | $3,692 |
238170 | Siding contractors | 327 | $58,557,000 | $286,471,000 | $179,073 | $876,058 | $1,791 | $2,628 |
238190 | Other foundation, structure, and building exterior contractors | 113 | $37,585,000 | $123,771,000 | $332,611 | $1,095,319 | $3,326 | $3,286 |
238210 | Electrical contractors and other wiring installation contractors | 1847 | $940,854,000 | $3,026,762,000 | $509,396 | $1,638,745 | $5,094 | $4,916 |
238220 | Plumbing, heating, and air-conditioning contractors | 1664 | $959,976,000 | $3,169,548,000 | $576,909 | $1,904,776 | $5,769 | $5,714 |
238290 | Other building equipment contractors | 81 | $117,696,000 | --- | $1,453,037 | --- | $14,530 | --- |
238310 | Drywall and insulation contractors | 653 | $282,929,000 | $723,945,000 | $433,276 | $1,108,644 | $4,333 | $3,325 |
238990 | All other specialty trade contractors | 547 | $182,710,000 | $573,308,000 | $334,022 | $1,048,095 | $3,340 | $3,144 |
321213 | Engineered wood member (except truss) manufacturing | 11 | $14,216,000 | $79,051,000 | $1,292,364 | $7,186,455 | $12,924 | $21,559 |
321214 | Truss manufacturing | 22 | --- | --- | --- | --- | --- | --- |
321219 | Reconstituted wood product manufacturing | 3 | --- | --- | --- | --- | --- | --- |
321911 | Wood window and door manufacturing | 39 | $37,814,000 | $145,137,000 | $969,590 | $3,721,462 | $9,696 | $11,164 |
321992 | Prefabricated wood building manufacturing | 18 | $6,891,000 | --- | $382,833 | --- | $382,833 | --- |
327310 | Cement manufacturing | 7 | --- | --- | --- | --- | --- | --- |
327320 | Ready-mix concrete manufacturing | 93 | $74,457,000 | --- | $800,613 | --- | $8,006 | --- |
327331 | Concrete block and brick manufacturing | 18 | $11,218,000 | --- | $623,222 | --- | $6,232 | --- |
332311 | Prefabricated metal building and component manufacturing | 9 | $3,564,000 | --- | $396,000 | --- | $3,960 | --- |
332312 | Fabricated structural metal manufacturing | 94 | $125,755,000 | --- | $1,337,819 | --- | $13,378 | --- |
332321 | Metal window and door manufacturing | 16 | $23,776,000 | --- | $1,486,000 | --- | $14,860 | --- |
332322 | Sheet metal work manufacturing | 122 | $122,956,000 | $573,443,000 | $1,007,836 | $4,700,352 | $10,078 | $14,101 |
335121 | Residential electric lighting fixture manufacturing | 9 | --- | --- | --- | --- | --- | --- |
335122 | Commercial, industrial, and institutional electric lighting fixture manufacturing | 8 | $2,625,000 | --- | $328,125 | --- | $3,281 | --- |
335129 | Other lighting equipment manufacturing | 4 | --- | --- | --- | --- | --- | --- |
423720 | Plumbing and heating equipment and supplies (hydronics) merchant wholesalers | 168 | $82,225,000 | $897,748,000 | $489,435 | $5,343,738 | $4,894 | $16,031 |
541310 | Architectural services | 635 | $326,798,000 | $921,033,000 | $514,643 | $1,450,446 | $5,146 | $4,351 |
541330 | Engineering services | 1599 | $1,758,825,000 | $3,946,553,000 | $1,099,953 | $2,468,138 | $11,000 | $7,404 |
541350 | Building inspection services | 154 | $9,724,000 | $28,297,000 | $63,143 | $183,747 | $631 | $551 |
561621 | Security systems services (except locksmiths) | 109 | $86,072,000 | $233,388,000 | $789,651 | $2,141,174 | $7,897 | $6,424 |
Note: | Data is blank in some fields to protect data source. |
Data Source: | Economic Census of the United States. |
Estimate of the Number of Jobs That Will Be Created or Lost: The adoption of the latest code edition is not expected to significantly impact the number of jobs in the construction industry. These rules are likely to be job neutral overall, i.e., they will not result in any job gains or losses. The scheduled effective date of the new edition is July 1, 2020. Building permits issued prior to that date will be vested under the 2015 Building Code. Permits issued for projects under the 2018 code edition will generally start with the 2021 construction season.
A copy of the statement may be obtained by contacting Richard Brown, 1500 Jefferson Street S.E., Olympia, WA 98504, phone 360-407-9277, email Richard.brown@des.wa.gov.
August 5, 2019
Doug Orth
Council Chair
Chapter 51-50 WAC
STATE BUILDING CODE ADOPTION AND AMENDMENT OF THE ((2015))2018 EDITION OF THE INTERNATIONAL BUILDING CODE
AMENDATORY SECTION(Amending WSR 19-02-038, filed 12/26/18, effective 7/1/19)
WAC 51-50-0403Section 403—High-rise buildings.
403.3.2 Water supply to required fire pumps. In all buildings that are more than 420 feet (128 m) in building height, and buildings of Type IV-A and IV-B that are more than 120 feet in building height, required fire pumps shall be supplied by connections to not fewer than two water mains located in different streets. Separate supply piping shall be provided between each connection to the water main and the pumps. Each connection and the supply piping between the connection and the pumps shall be sized to supply the flow and pressure required for the pumps to operate.
EXCEPTION: | Two connections to the same main shall be permitted provided that the main is valved such that an interruption can be isolated so that the water supply will continue without interruption through not fewer than one of the connections. |
403.5.4 Smokeproof enclosures. Every required interior exit stairway serving floors more than 75 feet (22,860 mm) above the lowest level of fire department vehicle access shall be a smokeproof enclosure in accordance with Sections 909.20 and 1023.11. Where interior exit stairways and ramps are pressurized in accordance with Section 909.20.5, the smoke control pressurization system shall comply with the requirements specified in Section 909.6.3.
405.7.2 Smokeproof enclosure. Every required stairway serving floor levels more than 30 feet (9144 mm) below the finished floor of its level of exit discharge shall comply with the requirements for a smokeproof enclosure as provided in Sections 909.20 and 1023.11. Where interior exit stairways and ramps are pressurized in accordance with Section 909.20.5, the smoke control pressurization system shall comply with the requirements specified in Section 909.6.3.
((EXCEPTION: | Unless required by other sections of this code, portions of such stairways which extend to serve floors below the level of exit discharge need not comply with Sections 909.20 and 1023.11 provided the portion of the stairway below is separated from the level of exit discharge with a 1-hour fire barrier.)) |
AMENDATORY SECTION(Amending WSR 16-03-064, filed 1/19/16, effective 7/1/16)
WAC 51-50-0412Section 412—Aircraft-related occupancies.
412.2.2.1 Stairways. Stairways in airport traffic control towers shall be in accordance with Section 1011. Exit stairways shall be smokeproof enclosures complying with one of the alternatives provided in Section 909.20. Where interior exit stairways and ramps are pressurized in accordance with Section 909.20.5, the smoke control pressurization system shall comply with the requirements specified in Section 909.6.3.
(([F]))412.8.3 Means of egress. The means of egress from heliports and helistops shall comply with the provisions of Chapter 10. Landing areas located on buildings or structures shall have two or more means of egress. For landing areas less than 60 feet in length or less than 2,000 square feet in area, the second means of egress is permitted to be a fire escape, alternating tread device or ladder leading to the floor below. On Group I-2 roofs with helistops or helipads, rooftop structures enclosing exit stair enclosures or elevator shafts shall be enclosed with fire barriers and opening protectives that match the rating of their respective shaft enclosures below.
AMENDATORY SECTION(Amending WSR 19-02-038, filed 12/26/18, effective 7/1/19)
WAC 51-50-0504Section 504—Building height and number of stories.
Table 504.3
Allowable Building Height in Feet Above Grade Planea
Occupancy Classification | Type of Construction |
See Footnotes | Type I | Type II | Type III | Type IV | Type V |
A | B | A | B | A | B | A | B | C | HT | A | B |
A, B, E, F, M, S, U | NSb | UL | 160 | 65 | 55 | 65 | 55 | 65 | 65 | 65 | 65 | 50 | 40 |
S | UL | 180 | 85 | 75 | 85 | 75 | 270 | 180 | 85 | 85 | 70 | 60 |
H-1, H-2, H-3, H-5 | NSc,d | UL | 160 | 65 | 55 | 65 | 55 | 120 | 90 | 65 | 65 | 50 | 40 |
S | | | | | | | | | | | | |
H-4 | NSc,d | UL | 160 | 65 | 55 | 65 | 55 | 65 | 65 | 65 | 65 | 50 | 40 |
S | UL | 180 | 85 | 75 | 85 | 75 | 140 | 100 | 85 | 85 | 70 | 60 |
I-1 Condition 1, I-3 | NSd,e | UL | 160 | 65 | 55 | 65 | 55 | 65 | 65 | 65 | 65 | 50 | 40 |
S | UL | 180 | 85 | 75 | 85 | 75 | 180 | 120 | 85 | 85 | 70 | 60 |
I-1 Condition 2, I-2 | NSd,e,f | UL | 160 | 65 | 55 | 65 | 55 | 65 | 65 | 65 | 65 | 50 | 40 |
S | UL | 180 | 85 | | | | | | | | | |
I-4 | NSd,g | UL | 160 | 65 | 55 | 65 | 55 | 65 | 65 | 65 | 65 | 50 | 40 |
S | UL | 180 | 85 | 75 | 85 | 75 | 180 | 120 | 85 | 85 | 70 | 60 |
R | NSd | UL | 160 | 65 | 55 | 65 | 55 | 65 | 65 | 65 | 65 | 50 | 40 |
S13R | 60 | 60 | 60 | 60 | 60 | 60 | 60 | 60 | 60 | 60 | 60 | 60 |
S | UL | 180 | 85 | 75 | 85 | 75 | 270 | 180 | 85 | 85 | 70 | 60 |
For SI: 1 foot = 304.8 mm. |
UL = Unlimited; NS = Buildings not equipped throughout with an automatic sprinkler system; S = Buildings equipped throughout with an automatic sprinkler system installed in accordance with Section 903.3.1.1; S13R = Buildings equipped throughout with an automatic sprinkler system installed in accordance with Section 903.3.1.2. |
| a | See Chapters 4 and 5 for specific exceptions to the allowable height in this chapter. |
| b | See Section 903.2 for the minimum thresholds for protection by an automatic sprinkler system for specific occupancies. |
| c | New Group H occupancies are required to be protected by an automatic sprinkler system in accordance with Section 903.2.5. |
| d | The NS value is only for use in evaluation of existing building height in accordance with the International Existing Building Code. |
| e | New Group I-1 and I-3 occupancies are required to be protected by an automatic sprinkler system in accordance with Section 903.2.6. For new Group I-1 occupancies Condition 1, see Exception 1 of Section 903.2.6. |
| f | New and existing Group I-2 occupancies are required to be protected by an automatic sprinkler system in accordance with Section 903.2.6 and Section 1103.5 of the International Fire Code. |
| g | For new Group I-4 occupancies, see Exceptions 2 and 3 of Section 903.2.6. |
| h | New Group R occupancies are required to be protected by an automatic sprinkler system in accordance with Section 903.2.8. |
Table 504.4
Allowable Number of Stories Above Grade Planea,b
Occupancy Classification | Type of Construction |
See Footnotes | Type I | Type II | Type III | Type IV | Type V |
A | B | A | B | A | B | A | B | C | HT | A | B |
A-1 | NS | UL | 5 | 3 | 2 | 3 | 2 | 3 | 3 | 3 | 3 | 2 | 1 |
S | UL | 6 | 4 | 3 | 4 | 3 | 9 | 6 | 4 | 4 | 3 | 2 |
A-2 | NS | UL | 11 | 3 | 2 | 3 | 2 | 3 | 3 | 3 | 3 | 2 | 1 |
S | UL | 12 | 4 | 3 | 4 | 3 | 18 | 12 | 6 | 4 | 3 | 2 |
A-3 | NS | UL | 11 | 3 | 2 | 3 | 2 | 3 | 3 | 3 | 3 | 2 | 1 |
S | UL | 12 | 4 | 3 | 4 | 3 | 18 | 12 | 6 | 4 | 3 | 2 |
A-4 | NS | UL | 11 | 3 | 2 | 3 | 2 | 3 | 3 | 3 | 3 | 2 | 1 |
S | UL | 12 | 4 | 3 | 4 | 3 | 18 | 12 | 6 | 4 | 3 | 2 |
A-5 | NS | UL | UL | UL | UL | UL | UL | 1 | 1 | 1 | UL | UL | UL |
S | UL | UL | UL | UL | UL | UL | UL | UL | UL | UL | UL | UL |
B | NS | UL | 11 | 5 | 3 | 5 | 3 | 5 | 5 | 5 | 5 | 3 | 2 |
S | UL | 12 | 6 | 4 | 6 | 4 | 18 | 12 | 9 | 6 | 4 | 3 |
E | NS | UL | 5 | 3 | 2 | 3 | 2 | 3 | 3 | 3 | 3 | 1 | 1 |
S | UL | 6 | 4 | 3 | 4 | 3 | 9 | 6 | 4 | 4 | 2 | 2 |
F-1 | NS | UL | 11 | 4 | 2 | 3 | 2 | 3 | 3 | 3 | | 2 | 1 |
S | UL | 12 | 5 | 3 | 4 | 3 | 10 | 7 | 5 | 5 | 3 | 2 |
F-2 | NS | UL | 11 | 5 | 3 | 4 | 3 | 5 | 5 | 5 | 5 | 3 | 2 |
S | UL | 12 | 6 | 4 | 5 | 4 | 12 | 8 | 6 | 6 | 4 | 3 |
H-1 | NSc,d | 1 | 1 | 1 | 1 | 1 | 1 | NP | NP | NP | 1 | 1 | NP |
S | | | | | | | 1 | 1 | 1 | | | |
H-2 | NSc,d | UL | 3 | 2 | 1 | 2 | 1 | 1 | 1 | 1 | 2 | 1 | 1 |
S | | | | | | | 2 | 2 | 2 | | | |
H-3 | NSc,d | UL | 6 | 4 | 2 | 4 | 2 | 3 | 3 | 3 | 4 | 2 | 1 |
S | | | | | | | 4 | 4 | 4 | | | |
H-4 | NSc,d | UL | 7 | 5 | 3 | 5 | 3 | 5 | 5 | 5 | 5 | 3 | 2 |
S | UL | 8 | 6 | 4 | 6 | 4 | 8 | 7 | 6 | 6 | 4 | 3 |
H-5 | NSc,d | 4 | 4 | 3 | 3 | 3 | 3 | 2 | 2 | 2 | 3 | 3 | 2 |
S | | | | | | | 3 | 3 | 3 | | | |
I-1 Condition 1 | NSd,e | UL | 9 | 4 | 3 | 4 | 3 | 4 | 4 | 4 | 4 | 3 | 2 |
S | UL | 10 | 5 | 4 | 5 | 4 | 10 | 7 | 5 | 5 | 4 | 3 |
I-1 Condition 2 | NSd,e | UL | 9 | 4 | 3 | 4 | 3 | 3 | 3 | 3 | 4 | 3 | 2 |
S | UL | 10 | 5 | | | | 10 | 6 | 4 | | | |
I-2 | NSd,f | UL | 4 | 2 | 1 | 1 | NP | NP | NP | NP | 1 | 1 | NP |
S | UL | 5 | 3 | | | | 7 | 5 | 1 | | | |
I-3 | NSd,e | UL | 4 | 2 | 1 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 1 |
S | UL | 5 | 3 | 2 | 3 | 2 | 7 | 5 | 3 | 3 | 3 | 2 |
I-4 | NSd,g | UL | 5 | 3 | 2 | 3 | 2 | 3 | 3 | 3 | 3 | 1 | 1 |
S | UL | 6 | 4 | 3 | 4 | 3 | 9 | 6 | 4 | 4 | 2 | 2 |
M | NS | UL | 11 | 4 | 2 | 4 | 2 | 4 | 4 | 4 | 4 | 3 | 1 |
S | UL | 12 | 5 | 3 | 5 | 3 | 12 | 8 | 6 | 5 | 4 | 2 |
R-1h | NSd | UL | 11 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 3 | 2 |
S13R | 4 | 4 | | | | | | | | | 4 | 3 |
S | UL | 12 | 5 | 5 | 5 | 5 | 18 | 12 | 8 | 5 | 4 | 3 |
R-2h | NSd | UL | 11 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 3 | 2 |
S13R | 4 | 4 | 4 | | | | | | | | 4 | 3 |
| S | UL | 12 | 5 | 5 | 5 | 5 | 18 | 12 | 8 | 5 | 4 | 3 |
R-3h | NSd | UL | 11 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 3 | 3 |
S13D | 4 | 4 | | | | | | | | | 3 | 3 |
S13R | 4 | 4 | | | | | | | | | 4 | 4 |
S | UL | 12 | 5 | 5 | 5 | 5 | 18 | 12 | 5 | 5 | 4 | 4 |
R-4h | NSd | UL | 11 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 3 | 2 |
S13D | 4 | 4 | | | | | | | | | 3 | 2 |
S13R | 4 | 4 | | | | | | | | | 4 | 3 |
S | UL | 12 | 5 | 5 | 5 | 5 | 18 | 12 | 5 | 5 | 4 | 3 |
S-1 | NS | UL | 11 | 4 | 2 | 3 | 2 | 4 | 4 | 4 | 4 | 3 | 1 |
S | UL | 12 | 5 | 3 | 4 | 3 | 10 | 7 | 5 | 5 | 4 | 2 |
S-2 | NS | UL | 11 | 5 | 3 | 4 | 3 | 4 | 4 | 4 | 4 | 4 | 2 |
S | UL | 12 | 6 | 4 | 5 | 4 | 12 | 8 | 5 | 5 | 5 | 3 |
U | NS | UL | 5 | 4 | 2 | 3 | 2 | 4 | 4 | 4 | 4 | 2 | 1 |
S | UL | 6 | 5 | 3 | 4 | 3 | 9 | 6 | 5 | 5 | 3 | 2 |
UL = Unlimited; NP = Not permitted; NS = Buildings not equipped throughout with an automatic sprinkler system; S = Buildings equipped throughout with an automatic sprinkler system installed in accordance with Section 903.3.1.1; S13R = Buildings equipped throughout with an automatic sprinkler system installed in accordance with Section 903.3.1.2. |
| a | See Chapters 4 and 5 for specific exceptions to the allowable height in this chapter. |
| b | See Section 903.2 for the minimum thresholds for protection by an automatic sprinkler system for specific occupancies. |
| c | New Group H occupancies are required to be protected by an automatic sprinkler system in accordance with Section 903.2.5. |
| d | The NS value is only for use in evaluation of existing building height in accordance with the International Existing Building Code. |
| e | New Group I-1 and I-3 occupancies are required to be protected by an automatic sprinkler system in accordance with Section 903.2.6. For new Group I-1 occupancies Condition 1, see Exception 1 of Section 903.2.6. |
| f | New and existing Group I-2 occupancies are required to be protected by an automatic sprinkler system in accordance with Section 903.2.6 and Section 1103.5 of the International Fire Code. |
| g | For new Group I-4 occupancies, see Exceptions 2 and 3 of Section 903.2.6. |
| h | New Group R occupancies are required to be protected by an automatic sprinkler system in accordance with Section 903.2.8. |
504.4.1 Stair enclosure pressurization increase. For Group R1,((and R2 occupancies))R2 and I-1 Condition 2 Assisted living facilities licensed under chapter 388-78A WAC and residential treatment facilities as licensed by Washington state under chapter 246-337 WAC located in buildings of Type VA construction equipped throughout with an approved automatic sprinkler system in accordance with Section 903.3.1.1, the maximum number of stories permitted in Section 504.2 may be increased by one provided the interior exit stairways and ramps are pressurized in accordance with Sections((909))909.6.3 and 909.20. Legally required standby power shall be provided in accordance with Sections 909.11 and 2702.2.16 for buildings constructed in compliance with this section and be connected to stairway shaft pressurization equipment, elevators and lifts used for accessible means of egress (if provided), elevator hoistway pressurization equipment (if provided) and other life safety equipment as determined by the authority having jurisdiction. For the purposes of this section, legally required standby power shall comply with ((2014))2017 NEC Section 701.12, options (A), (B), (C), (D), (F), or (G) or subsequent revised section number(s).
AMENDATORY SECTION(Amending WSR 16-03-064, filed 1/19/16, effective 7/1/16)
WAC 51-50-0909Section 909—Smoke control systems.
909.6.3 Pressurized stairways and elevator hoistways. Where stairways or elevator hoistways are pressurized, such pressurization systems shall comply with the requirements of Section 909.20 of this code for stair pressurization and Section 909.21 of the International Building Code and Fire Code as necessary to determine that the stairway or elevator hoistways meet the pressurization requirements of the code. Stairway and elevator hoistway pressurization systems in high-rise buildings, underground buildings, and in airport traffic control towers shall comply with IBC and IFC Sections 909 as smoke control systems.
Stairway pressurization systems in other than high-rise buildings, underground buildings, or airport traffic control towers are smoke control systems but shall only be required to comply with the following IBC 909 Sections: 909.1, 909.2, 909.3, 909.6 with the exception of Sections 909.6.1, 909.10 with the exception of Sections 909.10.2 and 909.10.3, 909.11 with the exception of Sections 909.11.1, 909.12 with the exception of Sections 909.12.3.2, 909.13, 909.14, 909.17, 909.18 with the exception of Sections 909.18.2 and 909.18.9, 909.19, 909.20.5, and 909.20.6. Design drawings shall include a description of system operation, the conditions for system testing and the criteria for system acceptance to achieve the code minimum performance of the smoke control system. Stairway pressurization systems shall be maintained in accordance with Section 909.20 of the International Fire Code.
Elevator hoistway pressurization systems in other than high-rise buildings, underground buildings, or airport traffic control towers are smoke control systems but shall only be required to comply with the following IBC 909 Sections: 909.1, 909.2, 909.3, 909.6 with the exception of Sections 909.6.1, 909.10 with the exception of Sections 909.10.2 and 909.10.3, 909.11 with the exception of Sections 909.11.1, 909.12 with the exception of Sections 909.12.3.2, 909.13, 909.14, 909.17, 909.18 with the exception of Sections 909.18.2 and 909.18.9, 909.19, and 909.21 with the exception of Sections 909.21.2, 909.21.9, and 909.21.10. Design drawings shall include a description of system operation, the conditions for system testing and the criteria for system acceptance to achieve the code minimum performance of the smoke control system. Elevator hoistway pressurization systems shall be maintained in accordance with Section 909.20 of the International Fire Code.
909.21.12 Hoistway venting. Hoistway venting need not be provided for pressurized elevator shafts.
909.21.13 Machine rooms. Elevator machine rooms shall be pressurized in accordance with this section unless separated from the hoistway shaft by construction in accordance with Section 707.
AMENDATORY SECTION(Amending WSR 16-03-064, filed 1/19/16, effective 7/1/16)
WAC 51-50-1008Section 1008—((Reserved.))Means of egress illumination.
1008.2.3 Exit discharge. This subsection not adopted.
NEW SECTION
WAC 51-50-1023Section 1023—Interior exit stairways and ramps.
1023.11 Smokeproof enclosures. Where required by Section 403.5.4, 405.7.2 or 412.2.2.1, interior exit stairways and ramps shall be smokeproof enclosures in accordance with Section 909.20. Where interior exit stairways and ramps are pressurized in accordance with Section 909.20.5, the smoke control pressurization system shall comply with the requirements specified in Section 909.6.3.
AMENDATORY SECTION(Amending WSR 16-03-064, filed 1/19/16, effective 7/1/16)
WAC 51-50-3006Section 3006—((Reserved.))Elevators and conveying systems.
3006.3 Hoistway opening protection. Where Section 3006.2 requires protection of the elevator hoistway door opening, the protection shall be provided by one of the following:
1. An enclosed elevator lobby shall be provided at each floor to separate the elevator hoistway shaft enclosure doors from each floor by fire partitions in accordance with Section 708. In addition, doors protecting openings in the elevator lobby enclosure walls shall comply with Section 716.2.2.1 as required for corridor walls. Penetrations of the enclosed elevator lobby by ducts and air transfer openings shall be protected as required for corridors in accordance with Section 717.5.4.1.
2. An enclosed elevator lobby shall be provided at each floor to separate the elevator hoistway shaft enclosure doors from each floor by smoke partitions in accordance with Section 710 where the building is equipped throughout with an automatic sprinkler system installed in accordance with Section 903.3.1.1 or 903.3.1.2. In addition, doors protecting openings in the smoke partitions shall comply with Sections 710.5.2.2, 710.5.2.3, and 716.2.6.1. Penetrations of the enclosed elevator lobby by ducts and air transfer openings shall be protected as required for corridors in accordance with Section 717.5.4.1.
3. Additional doors shall be provided at each elevator hoistway door opening in accordance with Section 3002.6. Such door shall comply with the smoke and draft control door assembly requirements in Section 716.2.2.1.1 when tested in accordance with UL 1784 without an artificial bottom seal.
4. The elevator hoistway shall be pressurized in accordance with Sections 909.6.3 and 909.21.