Final answer:
The question is about the components used in construction and the correct answer is 'beams'.
Step-by-step explanation:
The subject of this question is Engineering because it is asking about the components used in construction, specifically steel elements. Steel beams, rods, columns, and plates are commonly used in structural engineering to provide strength and support to building structures. In this case, the correct answer would be A) beams because the question mentions 'two 12-mm A992 steel' which suggests the use of beams for reducing bending strains.