What is the minimum top edge height for toprails on supported scaffolds installed after January 1, 2000?

The minimum top edge height for toprails on supported scaffolds installed after January 1, 2000, is 42 inches (1.07 m). This height is established to ensure safety for workers on scaffolds, providing a proper guardrail system that helps prevent falls. The 42-inch standard is widely recognized in safety regulations and codes, including those from organizations such as OSHA. Having the toprail at this minimum height provides effective protection while allowing workers to perform their tasks without hindrance, contributing to an overall safer working environment.

Other options like 36 inches or 38 inches are below the requirement established for current safety standards, and 45 inches exceeds the necessary height, which could pose challenges in usability and compliance. Hence, adhering to the 42-inch standard is critical for safeguarding on supported scaffolds.