Foundation uplift safety factor
Foundation uplift safety factor
(OP)
I have always been instructed to us a 2 to 1 saftey factor when designing concrete footing/foundations to resist uplift. is this in any code (florida)?
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Foundation uplift safety factor
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RE: Foundation uplift safety factor
RE: Foundation uplift safety factor
RE: Foundation uplift safety factor
I heard all kinds of arguments through the years; but I feel 1.5 is a good safety factor against uplift and sliding.
Regards,
Lutfi
RE: Foundation uplift safety factor
In some cases, it is desired to avoid any theoretical uplift, and that will imply a safety factor compared to rigid-body-overturn of perhaps 2.0 to 4.0, and varies with the shape of the foundation.
RE: Foundation uplift safety factor
RE: Foundation uplift safety factor
I do feel combining 0.6*dead and the 1.5 safety factor is a little conservative although it is the approach I typically take.
RE: Foundation uplift safety factor
1946 UBC Sec. 2307: "The overturning moment from the wind pressure shall in no case exceed two-thirds of the dead load resisting moment."
2003 IBC Sec. 1806.1: "Retaining walls shall be designed for a safety factor of 1.5 against lateral sliding and overturning."
I could go on, but you get the point...
RE: Foundation uplift safety factor
TM 5-818-1 : SOILS AND GEOLOGY PROCEDURES FOR FOUNDATION DESIGN OF BUILDINGS AND OTHER STRUCTURES (EXCEPT HYDRAULIC STRUCTURES)
RE: Foundation uplift safety factor