Foundation - Soil Bearing Pressure - FLORIDA BUILDING CODE

[slickdeals]

When wind and live loads act simultaneously, each one can be reduced 25% when used in conjunction with dead loads, i.e., D + 0.75L + 0.75W.

The code also says that you cannot use 25% reduction in conjunction with a one-third stress increase.

However, does it allow me to use D+L+W along with a one-third stress increase?

In reading through Footnote (d) of Table 1804.2 in the Florida Building Code, it states that allowable bearing pressure can be increased by one-third only when using alternate load combinations listed in 1605.3.2.

The alternate load combinations are D + L + [ω]W or D + L + [ω]W/2. If wind loads are calculated per ASCE 7, then [ω] is 1.3.

It appears that there will be no effect of the one-third increase using the alternate load combos as I am increasing wind loads by 1.3 as well.

Thoughts?

 

[ron9876]

That's the wasy that I understand it.

 

[JAE]

Yes - we simply need to forget about the 1/3 stress increase and move on with our lives. sniff.

 

[slickdeals]

JAE: Totally agree with you.

But it looks like IBC and other model building codes are not completely in sync with ASCE 7.