Question

______ must be capable of supporting at least 2 ½ times the load being lifted. trench boxes guardrails jacking equipment pre - cast concrete

Explanation:

Jacking equipment is used for lifting loads, and safety regulations require it to support at least \(2\frac{1}{2}\) times the load being lifted to ensure safety during lifting operations. Trench boxes are for trench support, guardrails for fall protection, and pre - cast concrete is a building material, none of which are directly related to load - lifting support in this context.

Answer:

jacking equipment