When using a plank with a sawhorse and a ladder as a scaffold, what extension length is used?

When using a plank with a sawhorse and a ladder as a scaffold, what extension length is used?

• A. 6 inches
• B. 12 inches
• C. 18 inches
• D. 24 inches

Answer: (B)

When you set up a plank on a ladder with a sawhorse as a scaffold, the plank should overhang the ladder by about 12 inches. This length provides a safe, usable edge you can stand on and push off from, while keeping the majority of the plank supported by the ladder and sawhorse. If the extension is too short, you don’t have enough working surface and your footing can be unstable. If it’s much longer, the cantilever becomes excessive, increasing the risk of deflection, tipping, or snagging on surrounding objects. So 12 inches is the balanced, recommended extension.

When you set up a plank on a ladder with a sawhorse as a scaffold, the plank should overhang the ladder by about 12 inches. This length provides a safe, usable edge you can stand on and push off from, while keeping the majority of the plank supported by the ladder and sawhorse. If the extension is too short, you don’t have enough working surface and your footing can be unstable. If it’s much longer, the cantilever becomes excessive, increasing the risk of deflection, tipping, or snagging on surrounding objects. So 12 inches is the balanced, recommended extension.