Service Load Combinations for ACI 350-06
Service Load Combinations for ACI 350-06
(OP)
Q1: What load combinations do you all use when checking foundations for structures at a water treatment plant or waste water treatment plant? ACI 350 only lists ultimate load combinations in 9.2.1 and 2006/2009 IBC does not list F loads in Eq. 16-14 or 16-15 where the dead load is reduced. For an unbalanced wall this load case would basically control overturning.
Q2: Which building code references ACI 350? It is not listed in IBC, Ch. 35 - Referenced Standards.
Q2: Which building code references ACI 350? It is not listed in IBC, Ch. 35 - Referenced Standards.





RE: Service Load Combinations for ACI 350-06
A1. For foundations and overturning, plain working stress level loads are used. A 1.5 factor of safety is traditionally used for overturning and more importantly, sliding. Working stress loads are used since the soil capacities are usually given at allowable levels, not factored.
RE: Service Load Combinations for ACI 350-06
I'm not sure if your response to my Q1 is relevant. I agree 100% that I need to use working stress loads. My question is in regards to which Load Combinations to use. ACI 350 does not give working stress load combinations and IBC does not include Fluid Loads in theirs.
RE: Service Load Combinations for ACI 350-06