What is the web depth of a 40' long piece of S14x10 steel beam?

The web depth of a steel beam designation, such as S14x10, indicates specific dimensions of that beam. In this case, the designation 'S14x10' means that the beam has a nominal depth of 14 inches. The first number in the designation represents the height or depth of the beam in inches, while the second number refers to the weight of the beam per linear foot.

Therefore, for the S14x10 steel beam, the correct web depth is 14 inches, matching the first number in the designation. Understanding steel beam designations is essential in construction and structural engineering, as it helps in selecting the appropriate beam for specific load requirements and structural integrity.

The other answer choices represent depths not relevant to the S14x10 designation, highlighting the importance of accurately interpreting structural specifications.