wind loads for building structure and components??

[mark416]

Per NCB there are two methods for determining wind pressure for low rise buildings using external pressure coefficients. One for the primary structure (such as columns and beams)(fig. 1-7) and one for roofs and walls (fig 1-8 for wall and 1-9 to 1-14 for roofs).

I have no problem in determining the wind pressure for any of these cases. When designing the primary structure (columns and beams) I would apply the wind pressure obtained from using fig 1-7. Now for my question, would I apply the reactions from say the girts designed for wind per fig 1-8 onto the columns that already have a wind pressure determined from fig. 1-7? Or do I just design the girts for wind from fig. 1-8 and the main steel structure from fig 1-7?


Thanks,
M.

 

[kslee1000]

No. That's two seperate considerations. 1. Apply 1-7 on tributary area for columns and beams. 2. Apply 1-8 on tributary area for girts and purlins. Do design independently.