What is the maximum permissible extension of a scaffold plank beyond a ledger?

The maximum permissible extension of a scaffold plank beyond a ledger is 12 inches. This standard is in place to ensure the structural stability and safety of the scaffold system. When a plank extends too far beyond its support (the ledger), it creates a risk of tipping or unstable footing for workers. By limiting the extension to 12 inches, it helps maintain a balance between accessibility for workers and the overall integrity of the scaffold. This is in line with safety regulations and best practices in construction, emphasizing the importance of proper load distribution and secure anchoring to prevent accidents on the job site.

Understanding this principle is crucial for anyone involved in scaffolding design or erection, as it directly influences worker safety and compliance with regulatory standards.