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. Safety standards require it to have a capacity of at least 2.5 times the load it is lifting to ensure safety and prevent failure. Trench boxes are for trench support, guardrails for fall protection, and pre - cast concrete is a construction material, none of which are directly related to the load - lifting capacity requirement described.

Answer:

Jacking equipment