Coastal and Floodplain Construction Inspector's Practice Exam

What is the uplift value for a building with a roof and ceiling dead load of 15 psf in a 110 mph wind zone with stud spacing of 16" o.c.?

1. 950 lbs per stud

2. 825 lbs per stud

3. 760 lbs per stud

4. 900 lbs per stud

The correct answer is: 825 lbs per stud

To determine the uplift value for a building in a specific wind zone, you need to consider several factors, including the wind speed, the dead load of the roof and ceiling, and the spacing of the studs. In this case, the building is located in a 110 mph wind zone, which establishes the wind pressure that must be accounted for in the structural design. The dead load is given as 15 pounds per square foot (psf), which contributes to the overall structural integrity of the building but, for uplift calculations, it is the wind pressure that is the primary concern. Typically, uplift calculations involve using established formulas or tables that take into account the wind speed and building characteristics to determine the uplift force. For buildings in high wind zones, the calculation often involves multiplying wind pressure by the area affected by the wind, and then dividing this by the number of studs supporting the roof. Assuming the wind pressure value for a 110 mph wind speed has been taken from relevant codes or guidelines, the formula will yield the amount of uplift force, which is usually expressed per stud based on their spacing. In this specific situation, the calculated uplift value for the given conditions results in an uplift force of 825 pounds per stud. This indicates that