# Standard Interpretations
1 - 1926.451(b) - Whether it is permissible to use a concrete block hanging on a coupling pin as a counterweight to prevent a scaffold from tipping.
2 - 1926.451(b) - Requirements in 1926 Subpart L "Scaffolds" regarding the use of plywood to make platform decking for scaffolds.
3 - 1926.451(b) - Wire rope clips on suspension scaffolds; safety latches on large crane hooks; order of assembly for hanging scaffolds; and horizontal lifeline design.
4 - 1926.451(b) - Use of aerial lift or scissor lift guardrails as a work or scaffold platform.
5 - 1926.451(b) - Planking, safety line, and personal fall arrest system requirements for tank builder's scaffolding.
6 - 1926.451(b) - Request that OSHA adopt a requirement that all scaffold planks meet a "scaffold grade" under recognized grading rules.
7 - 1926.451(b) - Requirements for scaffold grade lumber; qualifications of qualified/competent persons for grading scaffold lumber.