Residential Footing Loads ?

[fabbdc]

I'm looking for a source and/or information on design loads for a strip footing (monolithic slab) for residential construction (ie. P for foot of wall - Kips)
1. 2 story brick home
2. 1 story brick home

any help would be appreciated

 

[Ron]

Add the weight of all roofing materials (use 20 psf if you don't want to take the time otherwise), add up the weight of all wall materials (framing, insulation, brick, etc.) and divide your answer by the perimeter.

Usually around 2 klf for 1 story, and 3 klf for two story simple frame, brick veneer house.

 

[fabbdc]

Thanks Ron,

I was using 3K-lf for a one story house, and 4K-lf for a two story house. Good to know I'm on the conservative side.

 

[boo1]

Ron do you consider the Live Loads in sizing the strip foundation?

 

[Ron]

boo1...yes, but for anything other than flat roofs, they are usually pretty low, considering the code minimums. Exceptions are snow loads and wind loads for stability. For most residential geometry, foundation mass is not critical in stability. In some structures, foundation mass is the basis of stability.

As for the live loads, conservatively and by code we use that component. I only mentioned the computation for dead loads as the live loads are independent of the structural materials.

 

[ayfarm]

Refer to UBC code, footings are designed for seismic, gravity, wind, snow and other applicable loads in your locality.