Type of Vehicular Loading on Parking Garagae Slab
Type of Vehicular Loading on Parking Garagae Slab
(OP)
Hi Guys,
We have designed 1-story concrete parking garage slab (Exposed condition)for live load of 250 psf (normal vehicular load) and 400 psf (fire route).
Appreciate if someone helps regarding type of vehicles to allow for 250psf and 400psf. As client need to know whether snowremoval machinery, what type of dump trucks can pass over, trailer etc.
If somebody can help differentiating the vehicles to allow based on types and axle loading to pass for 250 psf and 400 psf.
We have designed 1-story concrete parking garage slab (Exposed condition)for live load of 250 psf (normal vehicular load) and 400 psf (fire route).
Appreciate if someone helps regarding type of vehicles to allow for 250psf and 400psf. As client need to know whether snowremoval machinery, what type of dump trucks can pass over, trailer etc.
If somebody can help differentiating the vehicles to allow based on types and axle loading to pass for 250 psf and 400 psf.






RE: Type of Vehicular Loading on Parking Garagae Slab
RE: Type of Vehicular Loading on Parking Garagae Slab
very generally speaking, 250 psf is approximately equivalent to the HS-20 truck on highway bridges. But, the psf load is highly dependent on the bridge span length.
Is the structure too complex that adding some point loads and at reasonable wheel and axle spacings in such a location as to produce maximum moment and shear is too difficult to analyze by hand using approximate methods? Or too time consuming to do via PC?
Unfortunately there is no easy answer to your question because of the variables.
RE: Type of Vehicular Loading on Parking Garagae Slab
RE: Type of Vehicular Loading on Parking Garagae Slab
RE: Type of Vehicular Loading on Parking Garagae Slab
How about if we allowed HS20 and restrict other heavier trucks/trailers on the same route of 250 psf is somewhat looks diffult to operate.
RE: Type of Vehicular Loading on Parking Garagae Slab
I believe that under the currrent AASHTO code, that figure of 300 psf has been lowered though, possibly to 250 psf.
Mike McCann
MMC Engineering
RE: Type of Vehicular Loading on Parking Garagae Slab
As we have isolated the fire route area in our drawings for 400psf. But 250psf outline need to be differentiated for lighter loads compared to 400psf.