Coastal and Floodplain Construction Inspector's Practice Exam

What is the maximum spacing of vertical reinforcements at continuous concrete or masonry gable ends for a single story residential structure in a 90 mph wind zone using 1 #5 rebar?

1. 8 inches

2. 10 inches

3. 12 inches

4. 6 inches

The correct answer is: 10 inches

In the context of designing for wind forces, particularly in areas with high wind speeds, it is crucial to ensure that the vertical reinforcements in gable ends of buildings are adequately spaced to provide sufficient structural integrity. In a 90 mph wind zone, the code requirements dictate how closely vertical reinforcement must be placed to resist tensile and compressive forces generated by strong winds. The maximum spacing of vertical reinforcements using #5 rebar in continuous concrete or masonry gable ends is established to ensure that the structural elements can effectively transfer loads and remain stable under high wind conditions. In this scenario, a maximum spacing of 10 inches is acceptable. This allowance balances the need for structural support while not making the construction process excessively complicated or costly. The choice not selected indicates smaller spacings, which, while potentially providing more reinforcement, may not be necessary given the specific wind zone conditions and could lead to over-engineering. Alternatively, larger spacings would not adequately address the potential loads from the wind, risking the failure of the structural components. Therefore, the indicated maximum spacing of 10 inches aligns with best practices and building codes for a single-story residential structure in such a wind zone.