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PDFWAC 296-870-70070

Intermittently stabilized working platforms.

In addition to these requirements, you also need to meet the requirements of both of the following sections in this chapter:
1. Suspended working platforms and manned platforms used on supported equipment, WAC 296-870-70050;
2. Working platform fall protection, WAC 296-870-70055.
(1) You must make sure each stabilizer tie is equipped with a "quick connect - quick disconnect" device for attachment to the building anchor that:
(a) Cannot be accidentally disengaged; and
(b) Is resistant to adverse environmental conditions.
(2) You must make sure the platform has a stopping device that will interrupt the hoist power supply in the event the platform contacts a stabilizer tie during its ascent.
(3) You must make sure intermittently stabilized platforms use stabilizer ties that:
(a) Allow the specific attachment length needed to obtain the predetermined angulation of the suspended wire rope; and
(b) Maintain the specific attachment length at all building anchor locations.
(4) You must make sure stabilizer ties can be attached and removed without horizontal movement of the platform.
(5) You must make sure platform-mounted equipment and suspension wire ropes:
(a) Will not be damaged by the loads from the stabilizer tie or its building anchor; and
(b) Are able to withstand a load that is at least twice the ultimate strength of the stabilizer tie.
(6) You must make sure building face rollers are placed so they do not contact exterior anchors used on the building face.
(7) You must make sure the platform maintains continuous contact with the building face while ascending and descending.
[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050. WSR 15-23-086, § 296-870-70070, 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, § 296-870-70070, filed 9/19/06, effective 1/1/07.]
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