What are the minimum and maximum distances (in inches) that a scaffold plank can extend beyond its end support?

The minimum and maximum distances that a scaffold plank can extend beyond its end support are determined by safety regulations to ensure stability and support. The correct answer of 6 inches minimum and 12 inches maximum is based on standard safety practices that help mitigate the risk of scaffold planks tipping or failing under load.

The minimum extension of 6 inches ensures that there is sufficient plank overlap on the support to maintain integrity and prevent slippage. Meanwhile, the maximum extension of 12 inches helps prevent excessive overhang that could create an unstable condition or increase the potential for the planks to bend or break under load.

These guidelines are crucial for maintaining a safe working environment on scaffolding, as they directly influence how securely scaffold planks can support workers and materials at height. Understanding these distances helps ensure compliance with safety standards established by regulatory organizations.