Wash. Admin. Code § 296-870-70040 - Suspended equipment strength and stability
(1) You must make sure each
suspended unit component is:
(a)
Capable of supporting, without failure, at least four times the
maximum intended live load applied or transmitted to it;
and
(b) Constructed of materials that
will withstand the anticipated weather conditions.
EXEMPTION: |
The strength requirement does not apply to suspension ropes and guardrail systems. |
(2) You must make sure each
suspended unit has a load rating plate that:
(a) Is conspicuously located;
and
(b) States the suspended unit
weight and rated load.
(3) You must make sure suspended
units that do not have the suspension points at the end of the unit:
(a) Are continuously stable for any
position or use of the live load;
and
(b) Maintain at least a one and
one-half to one stability factor against unit upset.
(4) You must
make sure each suspended unit has guide rollers, guide shoes, or
building face rollers that compensate for variations in building
dimensions and for minor horizontal out-of-level variations of the
suspended unit.
(5) You
must make sure the working platform of each suspended unit is secured
to the building facade by at least one of the following methods:
(a) Continuous engagement to
building anchors;
(b)
Intermittent engagement to building anchors;
(c) Button guide
engagement;
(d) Angulated
roping and building face rollers;
(e) A system equivalent to
continuous engagement to building anchors.
Notes
Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, 47.17.060. 06-19-075, § 296-870-70040, filed 9/19/06, effective 1/1/07.
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