uplift per ASCE 7-05

[AlpineEngineer]

I have a stick built roof system that is entirely supported by post and beam. I am using ASCE 7-05 to analyze uplift on the roof. There ends up being quite a large uplift, 13kips, on one of the posts due to multiple beams coming in at one point. Can I take credit for the roof, timber beam, and column dead wieghts and subtract this from the ASCE 7-05 uplift loads? I don't find any explanation in ASCE. I see in 2003IRC there is a note that their uplift values allready include a consideration for 10psf dead load. If I can't subtract these dead loads then I suppose all of this uplift needs to be resisted by a mass of concrete at the fndn? Is there a way to tie the column to intermediate floor diaphrams for additional dead weight, I've never seen this done? 13,000# is a lot of concrete...

Thanks guys,

 

[DaveAtkins]

It is perfectly OK to subtract 0.6*DL from the uplift.

DaveAtkins

 

[MarcbSE]

The uplift loads in ASCE7 do not account for any dead load. As DaveAtkins said, it is fine to consider 0.6*DL to reduce the uplift.