Dead loads on residential structure 3

[Iasonasx]

This may be a bit of a "light" question, but I have to start from something. I am considering what would be my dead loads on a residential single family house. I have the longest bay being about 16'-10" so I am considering 2x10 @ 12" O.C. I also consider that there would be two layers of 3/4" wood on top of that, and another layer of 3/4" below. I wonder what I should add in case there is tiling, for ducts, and pipes, etc. Should DL before LRFD factorization exceed 12 lbf/ft^2?

 

[XR250]

2x10 @ 12" O.C. can be bouncy at 16'-10" span. Might be ok for a bedroom or attic., but not for other spaces. I usually use 12 psf for floor dead load unless some mud set tile is being used (and i am aware of it). Realistically, a couple PSF DL here or there will not matter as it gets lost in the noise of the live load. I never bother with LRFD for residential as 90% of the members are controlled by serviceability, not strength.

 

[SlideRuleEra]

Iasonasx - Information on residential dead loads is in Chapter 3 of the U.S. Dept. of Housing & Urban Development's "Residential Structural Design Guide: 2000 Edition". The entire book is worth reading.
Here the link to the free download: Residental Structural Design Guide: 2000 Edition

http://www.SlideRuleEra.net

http://www.VacuumTubeEra.net

 

[Iasonasx]

I was worried that I was overestimating. Thank you guys. That's great! Frankly, I was calculating somewhere around 11.5 psf before adding any extras for hvac and other pipes.

 

[jayrod12]

I've always just defaulted to 20 psf for residential floor unless I'm trying to get an existing condition to work.

It absolves me of having to worry about the flooring type etc.

It's never caused significant size difference.