Answer Happy

Questions 9-11: Wind Loads Questions 9 & 11 will use the same building section as for the seismic example above. 9. The maximum wind speed (throughout the year) at the NYC site is rated at 75 mph. Using the equation rather than the table discussed in class, what is the stagnation pressure (psf). stagnation pressure psf 10. The NWC site has Exposure B, and you may use the height of each floor for looking up Ce in the table provided on ELMS. It is considered a 'Standard Occupancy building for selecting Importance Factor from the table. We will be calculating the wind load on the exterior walls of the building at each floor using calculation Method 2 (Projected Area), So Cq = 1.4 (the building is greater than 40 feet tall overall). What is the total wind load on each floor of the building (in psf)? Hint: This will require you to calculate the wall area tributary to each floor diaphragm as we did in ARCH 464. The span (width) of the diaphragm is 100' as noted above. Level height (ft) Ce* Wall Area (ft2) Wind Load (kips) 1 0.67 2 0.776 3 0.862 4 0.968 5 1.022 these values are interpolated from the table presented in class. I have done the math for you. 11. Assuming that the building exposure at the LA site is ALSO Exposure B, but that the wind speed is 90 mph, what is the largest diaphragm wind load (largest of Fwinda through winds) on that building (extrapolating from the values in problem #10 above. Hint: You may scale the number off the values above without recalculating everything.
1ee-o" W5 - 450 K 17-e W4 - 600k 20-e W3 - ek 12-e W2beek .-21 WI-600 K 28-e