Wind Load Factor for Soil Pressure control

[Ben-CES4]

well,I use ultimate wind speed for ETABS model and export outputs to the SAFE software. For soil pressure control under the footing, should I multiple wind load factors by 0.67 to change it to the service load or I should use ASD wind speed in ETABS and then export outputs to SAFE and use default load combination of the program without any changes?

 

[Jeoku]

My suggestion is to talk to the Geotechnical Engineer and have him tell you what you should be doing if you are unsure. Right or wrong, I usually use the ASD load combinations in ASCE 7 and use which ever combination controls. Sometimes Geotechs let you use a larger bearing pressure when you are talking wind or seismic loads though.

 

[Lomarandil]

Whether you use ultimate wind loads and convert to service-level afterward or use service level loads doesn't matter (as long as your conversion is correct!).

Jeoku is right that sometimes a geotech will give some wiggle room in allowable bearing pressure for transient lateral loads -- depends on your soil and the experience of the geotech.

----
The name is a long story -- just call me Lo.