Ladders should not be placed on top of sidewalk elevator trapdoors or sidewalk deadlights because:

• A. The areas may give out under the additional weight
• B. People evacuating may need to use those means of egress
• C. The coverings' material is prone to slippage, causing the ladder to fall
• D. The surface is too rough for footing

Answer: (A)

Ladders must be placed on surfaces that can support their weight without moving or giving way. Sidewalk elevator trapdoors and sidewalk deadlights are coverings over openings and are not designed to bear the concentrated and dynamic load of a ladder plus a climber. If the trapdoor or its frame fails or shifts, the ladder can move, slip, or drop into the opening, creating a fall hazard. That immediate risk of structural failure under load is why this placement is not safe.

The other options describe related concerns (egress use, slippery coverings, rough footing) but they don’t address the direct danger of the surface giving way under the ladder and climber.