Civil Engineering Professional Engineer Practice Exam 2026 – All-in-One Comprehensive Guide to Exam Success!

The typical value for the coefficient of friction between concrete and steel falls in the range of approximately 0.4 to 0.7. This value reflects the interaction between the concrete surface and the steel surface, which is crucial in structural applications where these materials are in contact. The coefficient of friction is important for understanding how forces are transmitted between materials, particularly in scenarios like shear connections in beams or other structural elements where preventing sliding is essential.

This range is derived from empirical testing and practical engineering considerations. It accounts for effects such as surface roughness, moisture presence, and the specific conditions of the materials being used. For instance, a rough finish on concrete can increase the frictional resistance, giving a higher coefficient, while a smooth surface may provide less friction.

When comparing the other choices, while they present valid ranges for other material interactions or conditions, the value of approximately 0.4 to 0.7 specifically applies to the common configurations of concrete and steel in civil engineering applications, making it the most appropriate answer for this question.