Coastal and Floodplain Construction Inspector's Practice Exam

What is the maximum spacing of vertical reinforcements for a multi-story residential structure in a 110 mph wind zone using 2 #5 rebar on a 14' length with 8" Concrete or Masonry?

1. 10 inches

2. 8 inches

3. 6 inches

4. 12 inches

The correct answer is: 6 inches

The maximum spacing of vertical reinforcements in a multi-story residential structure, particularly in a wind zone of 110 mph, is crucial for ensuring that the structure can withstand lateral forces caused by high winds. In this scenario, the use of 2 #5 rebar indicates a structural requirement to provide adequate reinforcement to the concrete or masonry for vertical loads and to resist wind forces. According to building codes and best practices for structural integrity, the spacing of vertical reinforcement bars must help distribute loads effectively while avoiding undue stress concentration in the concrete. For wind zones, especially higher wind areas, tighter vertical rebar spacing is essential; this helps in maintaining the structural stability and integrity of the walls under lateral loading conditions. The choice of a 6-inch maximum spacing is aligned with design provisions that require more closely spaced reinforcement when handling significant wind loads. This distance ensures adequate bonding, load distribution, and structural resilience. In contrast, wider spacing options would not meet the requirements established for ensuring the building's resistance to collapse or excessive lateral movement under wind loading conditions. Thus, citing the specific context of a 110 mph wind zone and the rebar configuration, a maximum spacing of 6 inches serves to ensure the structural safety and longevity of the residential building.