ASCE FIG. 27.4-8 Design wind load cases
ASCE FIG. 27.4-8 Design wind load cases
(OP)
Good afternoon all, I need help understanding how the roof wind loading works with these loading cases. My superior said he doesn't normally use this method. If some of you are familiar with using MWFRS part 1, please help. Attached is the particular page associated with this figure.






RE: ASCE FIG. 27.4-8 Design wind load cases
You can capture the eccentricity using a distributed load by having a trapezoidal load equal to 75% of the uniform load plus the resulting moment caused by said eccentricity.
RE: ASCE FIG. 27.4-8 Design wind load cases
RE: ASCE FIG. 27.4-8 Design wind load cases
RE: ASCE FIG. 27.4-8 Design wind load cases
RE: ASCE FIG. 27.4-8 Design wind load cases
One time I hand calculated all of the wind load cases for a semi-rigid diaphragm on a fairly irregular building because RAM Structural System did not automatically distribute the loads properly. After all of the hand calcs, one frame ended up with a less than 1% increase in force than case 1.
RE: ASCE FIG. 27.4-8 Design wind load cases