Question

Wall bracing Method PFG (Portal frame at garage door openings) is limited to walls supporting ____ ____ and a _____.

1) Only vertical loads and wind
2) Only vertical loads and seismic
3) Only horizontal loads and wind
4) D) Only horizontal loads and seismic

Answer 1

To determine the force exerted by each of the 10 braces on a wall subject to a horizontal wind force, calculate the total force on the wall and divide it by the number of braces.

Step-by-step explanation:

Static equilibrium and the calculation of forces in a structure subject to wind loads. To solve this problem, we use the premise that the wall is 17.0 m high and 11.0 m long, with each square meter of the wall experiencing a horizontal force of 650 N due to the wind. As the force from the wind acts at a height halfway up the wall, and there are 10 braces supporting the wall, each brace must exert an equal force to counteract the wind pressure and maintain equilibrium.

First, we calculate the total horizontal force on the wall by multiplying the wind force per square meter (650 N) by the total area of the wall (17.0 m × 11.0 m), yielding a total force. Next, considering the total force is equally distributed across the 10 braces, we would divide the total force by 10 to find the force exerted by each brace. The exact calculations are not provided in this example, as we must rely on the associated figure (Figure 9.30) and additional context to compute the force values precisely.