What 29 CFR 1926.454 requires (plain English)
29 CFR 1926.454 sets the training requirements that make the scaffolding standard (1926.451) effective. Because scaffolds present fall, collapse, struck-by, and electrical hazards that vary by scaffold type, the standard requires that the workers using and building them be trained to recognize and control those hazards.
Each employee who performs work while on a scaffold must be trained by a person qualified in the subject matter to recognize the hazards associated with the type of scaffold being used and to understand the procedures to control or minimize them: covering fall hazards, falling-object hazards, electrical hazards, the scaffold's maximum intended load and capacity, and proper use. Separately, each employee involved in erecting, disassembling, moving, operating, repairing, maintaining, or inspecting a scaffold must be trained by a competent person. Retraining is required when there is reason to believe a worker lacks the necessary skill or when conditions change.
1926.454 is the training complement to the scaffolding standard (1926.451) and the general construction training duty (1926.21). It reflects that a scaffold is only as safe as the understanding of the workers on and around it.