Section 296-874-40030. Meet these requirements when using pole scaffolds.

(1) You must make sure pole scaffolds over sixty feet high are:

(a) Designed by a registered professional engineer; and

(b) Constructed and loaded as specified in the design.

(2) You must leave existing platforms undisturbed until new bearers have been set in place and braced before moving the platforms to the new level.

(3) You must install bracing on double-pole scaffolds as follows:

(a) Crossbracing between the inner and outer sets of poles;

(b) Diagonal bracing in both directions across the entire outside face of the scaffold;

(c) Diagonal bracing in both directions across the entire inside face of scaffolds that are used to support loads equivalent to a uniformly distributed load of fifty pounds (222 kg) or more per square foot (929 square cm).

(4) You must install diagonal bracing on single pole scaffolds in both directions across the entire outside face of the scaffold.

(5) You must make sure runners meet all of the following:

(a) Are installed on edge;

(b) Extend over a minimum of two poles;

(c) Are supported by bearing blocks securely attached to the poles.

(6) You must make sure bearers are:

(a) Installed on edge; and

(b) Extend a minimum of three inches (7.6 cm) over the outside edges of runners.

(7) You must make sure runners, bearers, and braces are not spliced between poles.

(8) You must make sure wood poles that are spliced together meet both of the following:

(a) The ends of the poles at the splice:

(i) Are square; and

(ii) The upper section rests squarely on the lower section.

(b) Wood splice plates are provided that meet all of the following:

(i) Are installed on at least two adjacent sides;

(ii) Extend at least two feet (0.6 m) on either side of the splice;

(iii) Overlap the abutted ends equally;

(iv) Have the same cross-sectional areas as the pole.

Note:	Splice plates of material other than wood may be used if they are of equivalent strength.

[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050. WSR 15-23-086, § 296-874-40030, filed 11/17/15, effective 12/18/15. Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, 49.17.060. WSR 05-01-054, § 296-874-40030, filed 12/7/04, effective 3/1/05.]

RCW 49.17.010, 49.17.040, 49.17.050. WSR 15-23-086, § 296-874-40030, filed 11/17/15, effective 12/18/15. Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, 49.17.060. WSR 05-01-054, § 296-874-40030, filed 12/7/04, effective 3/1/05.