1. (1) You must make sure the platform height is not higher than twenty feet (6.1 m).

2. (2) You must make sure ladder jacks are designed and constructed so they rest:

   1. (a) On the side rails and ladder rungs together; or
   2. (b) Only on the rungs.
3. (3) You must make sure ladder jacks that rest on rungs only have a bearing area that includes a length of at least ten inches (25.4 cm) on each rung.

4. (4) You must make sure ladders used to support ladder jacks are:

   1. (a) Type I (two hundred fifty pound rated capacity) or Type IA (300 pound rated capacity); and

   2. (b) Are placed, fastened, or equipped with devices to prevent slipping.

      Note:

      Ladders with a duty rating or weight capacity greater than a Type I ladder (250 pounds) satisfy the requirement to use a Type I or Type IA ladder.

5. (5) You must make sure job-made ladders are not used to support ladder jack scaffolds.

6. (6) You must make sure scaffold platforms are not bridged together.

   Reference:	1. There are specific fall protection requirements for employees using ladder jack scaffolds. Go to WAC 296-874-20056.
   	2. Requirements for portable and fixed ladders are found in chapter 296-876 WAC, Ladders, portable and fixed.

[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050. WSR 15-23-086, § 296-874-40026, filed 11/17/15, effective 12/18/15. Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, 49.17.060. WSR 06-16-020, § 296-874-40026, filed 7/24/06, effective 12/1/06; WSR 05-01-054, § 296-874-40026, filed 12/7/04, effective 3/1/05.]