Question

The scaffold plank shall extend over the centerline of the support (like a frame) by at least ___________, unless cleated or hooked or other equivalent means.

Option 1. 6 inches
Option 2. 9 inches
Option 3. 12 inches
Option 4. 15 inches

Answer 1

The scaffold plank must extend over the end support by at least 12 inches as per OSHA standards, to ensure stability and prevent accidents. The correct multiple-choice option is (c).

Step-by-step explanation:

The correct answer to the student's question is 12 inches. According to Occupational Safety and Health Administration (OSHA) standards for construction (specifically, 29 CFR 1926.451(b)(1)), a scaffold plank must extend over its end support by at least 12 inches unless it is otherwise secured to prevent movement. This safety regulation ensures that the scaffold remains stable and secure, preventing potential accidents caused by the plank tipping or falling. In scenarios where cleating or securing is not possible, the extended length provides a margin of safety against plank displacement. The correct multiple-choice option is Option 3. 12 inches.