Percentage of material passing through a sieve opening | Sieve opening size |
| | | 100 | | 1 1/2 inch square |
| 90 | - | 100 | | 1 inch square |
| 40 | - | 80 | | 3/4 inch square |
| 15 | - | 60 | | 1/2 inch square |
| 0 | - | 30 | | 3/8 inch square |
| 0 | - | 10 | | #4 |
| 0 | - | 5 | | #8 |
| 0 | - | 0.5 | | #200 |
(b) Smaller crushed material is preferred and should be used where drainage and durability is not an issue. Crushed material that is 3/4 inch or less in size is recommended for switching leads in yards.
(c) Asphalt, concrete, planking, grating, or other similar material.
(d) Natural materials such as gravel or dirt.
(4) You must construct walkways wide enough for employees to safely perform their duties.
(5) You must construct walkways with a grade or slope in any direction with not more than one inch of elevation for each eight inches of horizontal length, unless it is geographically impractical.
Maintenance of walkways
(6) You must keep all walkways clear of vegetation, debris, mud, or other obstructions that create a potential hazard for employees.
(7) You must remove all standing water from all walkways as soon as reasonably possible.
(8) You must reopen walkways temporarily closed for a construction project within thirty days after the project is completed.
(9) You must repair walkways that have been damaged and temporarily closed because of an emergency within thirty days after the emergency ends.
(10) You must obtain a department variance before permanently removing any bridge or trestle walkway from use after October 1, 2002 (the effective date of this rule).
Note: | The requirements for filing a variance are located in the safety and health core rules and chapter 296-900 WAC, Administrative rules. |
[Statutory Authority: RCW
49.17.010,
49.17.040,
49.17.050,
49.17.060. WSR 15-24-102, § 296-860-20020, filed 12/1/15, effective 1/5/16; WSR 07-03-163, § 296-860-20020, filed 1/24/07, effective 4/1/07. Statutory Authority: RCW
49.17.010, [49.17].040, and [49.17].050. WSR 02-17-106, § 296-860-20020, filed 8/21/02, effective 10/1/02.]