Coastal and Floodplain Construction Inspector's Practice Exam

For a house with a gable end wall in the 110 mph wind zone exposure B, how far apart should fasteners be placed along a 15' high wall?

1. 8 inches o.c.

2. 10 inches o.c.

3. 12 inches o.c.

4. 14 inches o.c.

The correct answer is: 12 inches o.c.

In the context of coastal and floodplain construction, ensuring that structural elements can withstand wind loads is critical, especially in areas categorized by specific exposure conditions. For a gable end wall subjected to a 110 mph wind zone in exposure B, the attachment of wall sheathing to the framing is particularly important for providing structural integrity. The requirement for placing fasteners at 12 inches on center (o.c.) along the height of a 15-foot wall is based on the need for adequate resistance against wind uplift and lateral pressures. The spacing of 12 inches allows for a balanced distribution of forces across the wall assembly, minimizing the risk of failure at critical points. It ensures that each area of the wall is adequately secured to the studs beneath, reducing the likelihood of separation or damage due to wind pressure. The guidelines for fastener placement generally consider factors such as the wall height, wind speed, material types, and the specific exposure conditions. Hence, adherence to the 12 inches o.c. spacing reflects recommendations from building codes and standards designed to ensure safety and stability in high-wind regions. Other spacing options such as 8, 10, or 14 inches can either over- or under-secure the sheathing, potentially leading to inefficiencies