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Calculating wind base shears?

Calculating wind base shears?

Calculating wind base shears?

(OP)
We are a very small architectural firm here in the south.  We mainly do residential work, but got a little pool house to work on in a community.  In the appendix B, they are asking for the wind base shears, Vx=? and Vy=?.  An engineer showed me a very easy calculation for this once a very long time ago, but I can't remember it.  Can anyone help me out with this?  Thanks.

RE: Calculating wind base shears?

Calculate the wind pressures using the simplified method given in ASCE 7-05

You need to know the design wind speed (there is a map in ASCE 7), the roof height, the Exposure Category (probably B or C), and the importance factor (probably 1)

Next determine if it is near a hill (Kzt) and than determine the lambda factor for exposure and height. Than use figure 6-2 or figure 6-3 depending on the whether you want components and cladding or main wind.  Multiple the pressure by the area and that is your base shear, repeat in the other direction.

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