Exterior stormwater inlets subject to vehicular traffic must be set on a suitable base capable of sustaining what?

• A. A concrete slab
• B. A slip-resistant surface
• C. The anticipated load
• D. A minimum of concrete

Answer: (C)

The main idea is that exterior stormwater inlets that carry vehicle traffic must sit on a base designed to carry the weight and forces of the traffic they’ll encounter. This means the base must be able to sustain the anticipated load—both the static weight of vehicles and the dynamic forces from braking, turning, and impact—so the grate and surrounding pavement don’t settle, shift, or fail. A surface being slip-resistant or being made of concrete are important details, but they’re not the essential requirement here; the priority is ensuring the base can support the expected loads.