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Re: stack foundation

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You say you use a factor of safety of 1.76 for overturning? But this using
allowable soil pressures or factored soil pressures? If the former, then
you're factor of safety would be higher, yes?


On Wed, 20 Sep 2000, John MacLean wrote:    

I use a limit states code for design so the overturning moment (wind) is
multiplied by 1.5 and the resisting moment (dead load) is multiplied by
0.85. The "factor of safety" would be 1.5/0.85 = 1.76.

I check the soil bearing pressure at specified (allowable) load levels
and design the footing based on soil pressures at factored load levels.
                                                                        



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