Wind Uplift on Strip Footing

[Ryan Sevy]

Hi everyone, I'm trying to size up a strip footing for a house foundation. How do I calculate wind uplift for a footing in lb/ft? (I'm still in school and haven't taken classes on this yet) I have found all the wind loads for each building surface (envelope method), and I can find the dead load of the structure. Just need to know the next steps to find uplift force. Thanks.

 

[KootK]

In broad strokes:

1) Some of the wind forces that you've calculated likely produce uplift on the associated surfaces. If not, let's talk about that.

2) Sort out the load path by which the uplift forces that you calculate make their way to your foundations.

3) Sort out what, if any, reliable dead load your foundations will support that can be used to oppose any uplift that you need to deal with.

4) Design your foundation for load effects including member resistance, overturning, and possibly sliding considering:

a) The uplift less the reliable, opposing dead load.

b) The foundation's ability to mobilize the reliable, opposing dead load.

That's the best that I can do without more context regarding your building.