1. (1) You must make sure transportable outriggers are only used when all of the following are met:

   1. (a) They are used with self-powered, ground-rigged working platforms;
   2. (b) The point of suspension is not higher than three hundred feet (91.5 m) above a safe surface;
   3. (c) A tie-in guide stabilization system is provided.

2. (2) You must make sure each outrigger is secured with a tie down to a verified anchorage on the building and meets all of the following:

   1. (a) The outrigger is tied down during the entire time it is used;
   2. (b) The outrigger is tied back with a rope equivalent in strength to the suspension rope;
   3. (c) The tie-back rope is installed parallel to the centerline of the outrigger;
   4. (d) The anchorage has a design stability factor against overturning or upsetting of the outrigger of not less than four.
3. (3) You must make sure access to and egress from the working platform is from and to a safe surface below the point of suspension.
4. (4) You must make sure each outrigger has a design stability factor to prevent rollover in the event of an accidental lateral load on the outrigger of not less than seventy percent of the rated load of the hoist.
5. (5) You must make sure each outrigger is designed to support an ultimate load of not less than four times the rated load of the hoist.
6. (6) You must make sure each outrigger is located so that the suspension wire ropes for two point suspended working platforms are parallel.

[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050. WSR 15-23-086, § 296-870-70025, filed 11/17/15, effective 12/18/15. Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, 47.17.060. WSR 06-19-075, § 296-870-70025, filed 9/19/06, effective 1/1/07.]