33% Increase on Allowable Bearing Capacity for Basic and Alternative ASD Load Combination
33% Increase on Allowable Bearing Capacity for Basic and Alternative ASD Load Combination
(OP)
Does the increase of 33% on allowable bearing capacity is applicable for both Basic and Alternative ASD Load Combination?
I remember this increase of allowable stress is only applicable to alternative load combination. For soil capacity, it is allowed for both?
I remember this increase of allowable stress is only applicable to alternative load combination. For soil capacity, it is allowed for both?





RE: 33% Increase on Allowable Bearing Capacity for Basic and Alternative ASD Load Combination
RE: 33% Increase on Allowable Bearing Capacity for Basic and Alternative ASD Load Combination
RE: 33% Increase on Allowable Bearing Capacity for Basic and Alternative ASD Load Combination
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RE: 33% Increase on Allowable Bearing Capacity for Basic and Alternative ASD Load Combination
RE: 33% Increase on Allowable Bearing Capacity for Basic and Alternative ASD Load Combination
RE: 33% Increase on Allowable Bearing Capacity for Basic and Alternative ASD Load Combination
RE: 33% Increase on Allowable Bearing Capacity for Basic and Alternative ASD Load Combination
The OP has a good question. More often than not, the soils reports I review include a 1/3 increase for short term loads (wind and seismic). I have used this increase with typical ASD load combinations. Next time I want to use the 1/3 increase, I will check with the geotech. I assumed the increase is reasonable because bearing pressures are often governed by settlement which may not be a problem with short term loading.
RE: 33% Increase on Allowable Bearing Capacity for Basic and Alternative ASD Load Combination
Okiryu, thanks for the reference.
wannabeSE, that's the point of my question. In the soil report usually it says you may increase the bearing pressure. But in the IBC code, only the alternative basic load combination is stated to increase. Are the geotechnical engineers aware of this? Or they are allowing you to increase whatever combination as long it has short term loads.
RE: 33% Increase on Allowable Bearing Capacity for Basic and Alternative ASD Load Combination