Truck Wheel Load
Truck Wheel Load
(OP)
I have to design a concrete slab, one-way, that acts as a loading dock floor and ceiling to a transformer vault. This slab must be designed for a uniform live load of 600 psf or a wheel load of 16kips, which ever causes the greater stresses, per the transformer manufacturers specs. The thickness of this slab is being controlled by shear based on a wheel load acting directly adjacent to the support, and also assuming the possibility of 2 wheel loads acting on the same strip at once.
Is there any reference as to how wide of an area I may distribute this wheel load over the slab? My boss had told me to reference AASHTO, but I cannot locate our office copy.
Additional slab information:
Span = 16'-0" clear
DL = 655psf
f'c= 4000psi
fy = 60ksi
Slab is designed as simply supported (true simple support on one side, dowels into support wall with #4 @ 10 on the opposite side)
I'd like to get the slab down to 16" but currently with f'c = 4000psi, I need a 20" slab, and this can be reduced to 18" with f'c = 5000psi, but my boss would like to stay with 4000 psi.
Is there any reference as to how wide of an area I may distribute this wheel load over the slab? My boss had told me to reference AASHTO, but I cannot locate our office copy.
Additional slab information:
Span = 16'-0" clear
DL = 655psf
f'c= 4000psi
fy = 60ksi
Slab is designed as simply supported (true simple support on one side, dowels into support wall with #4 @ 10 on the opposite side)
I'd like to get the slab down to 16" but currently with f'c = 4000psi, I need a 20" slab, and this can be reduced to 18" with f'c = 5000psi, but my boss would like to stay with 4000 psi.






RE: Truck Wheel Load
I don't have AASHTO in front of me, but even the 16 inch slab sounds too thick.
RE: Truck Wheel Load
RE: Truck Wheel Load
To distribute the forces, I have used the with of the tire plus the thickness of the slab to either side for the design strip width in the past. But, that being said, consult AASHTO.
Mike McCann
MMC Engineering
RE: Truck Wheel Load
msquared48, there is a slopeing fill on top of this slab, plus a 4" concrete sidewalk topping on that. The sidewalk must be seperate from the slab with a waterproof membrane between them. In addition, there is an allowance of 30 psf for any hanging loads from the underside of the slab.
RE: Truck Wheel Load
RE: Truck Wheel Load
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RE: Truck Wheel Load