Question 8.23 through 8.30 refer to rigid diaphragmm shown above. The story shear Vx for both North _South and East_west direction is 500 Kips.

One-story building with a rigid roof diaphragm is shown. The roof has uniform thickness and the mass is uniformly distributed over the roof area. The rigidities of the four shear walls are:

R_A = 300 kip/in
R_B = 250 kip/in
R_C = 200 kip/in
R_D = 200 kip/in

Assume A_x = 1.3. Answer MCQs 6.1 to 6.7.

Loading shown on the plan:

• 800 plf line load along the bottom edge (X-direction loading case)
  
  

• 900 plf line load along the right edge (Y-direction loading case)
  
  

Use the plan geometry and wall locations as shown.