Coastal and Floodplain Construction Inspector's Practice Exam

In a 110 mph wind zone, what is the maximum spacing for vertical reinforcements at continuous concrete or masonry gable ends if using 2 #5 rebar for an 8' length?

1. 8 inches

2. 6 inches

3. 10 inches

4. 12 inches

The correct answer is: 10 inches

In a wind zone with sustained winds of 110 mph, the structural integrity of buildings becomes critical, particularly at the gable ends where loads from wind pressure can cause significant structural stress. The spacing of vertical reinforcements, such as rebar, is essential to ensure that the structure can withstand these lateral forces. The choice of a maximum spacing of 10 inches for vertical reinforcements when using 2 #5 rebar for an 8' length is based on structural engineering standards that address material strength and load distribution. When reinforcement is spaced appropriately, it ensures that the concrete or masonry can effectively resist bending moments and shear forces imposed by wind loads. By limiting the spacing to 10 inches at gable ends, structural engineers account for the need to maintain adequate structural integrity while also allowing for practical construction practices. This spacing supports compliance with building codes that dictate reinforcement based on design loads, ensuring safety and durability. While other spacing options, such as 6 inches or 8 inches, may provide even greater reinforcement, they can lead to increased material costs and might not be necessary for this specific load condition. Conversely, larger spacing, such as 12 inches, would not provide sufficient reinforcement in a high-wind zone, potentially compromising the structure