WAC 296-874-40014. Meet these requirements when using bricklayers' square scaffolds (squares)

(1) You must reinforce wood scaffolds with gussets on both sides of each corner. (2) You must make sure diagonal braces are installed: (a) On all sides of each square; (b) Between squares on the front and back sides of the scaffold; (c) Extending from the bottom of each square to the top of the next square. (3) Make sure scaffolds meet all of the following: (a) Are no more than three tiers high; (b) Are constructed and arranged so that each square rests directly above another square; (c) The upper tiers: (i) Stand on a continuous row of planks laid across the next lower tier; and (ii) Are nailed down or otherwise secured to prevent displacement.