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Re: Residential garage floor live load

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ASCE7 Table 4-1 recommends 40 PSF with a 3000-lb concentrated load at 4.5x4.5 inches.  This is not excessive, as a Hummer has a 6,400-lb curb weight. 
If the house you are designing is in the earthquake country, there may be much more to the problem than just the loads.
Investigating damage after the Paso Robles earthquake, I looked at the house where the F150 parked in the garage (slab-on-grade) was pushed into the wall about three feet away, causing considerable damage.  The experience of the Northridge earthquake 60 miles away in my own bedroom was quite a treat, and I knew that there was only a light roof above me.
Good luck,
V. Steve Gordin, SE
Irvine CA
----- Original Message -----
From: ken ng
Sent: Sunday, November 02, 2008 08:16
Subject: Residential garage floor live load

I never have any project which the 2 cars garage slab is located above the bedrooms.  I used live load = 50 psf.  Does 50 psf live load is under estimate?  Should I include 1,500# concentrate wheel load?