Design Load for vans and light truck parking garages

[ec29]

I am checking the capacity of an existing parking garage, originally designed for passenger cars (live load of 50 psf was used) to use it for parking vans and light trucks. The vans are around 9,000 lbs and are parked on one floor. The trucks are 19,000 lbs and are parked on a different floor. The garage is owned by a private firm and is not open to the public. I have the axle loads for both vehicles. What load should I check for? Is it acceptable and sufficient to place the wheel loads in the most critical location for each member and check for that? It seems to make sense but the IBC Code only addresses truck garages saying that you must use the big HS20 AASHTO loads. Besides if I used wheels loads for a passenger car garage I would not be even close to the 50 psf required by the code.

 

[jike]

Are there any restrictions (signs, bars restricting height or width, etc.) to prevent larger trucks from entering?

 

[ec29]

Not currently but can be placed

 

[CBSE]

The code says that the 50psf is applicable for vehicles that hold "Up-to 9 Persons". What size of truck weighs 19,000 lb?

ASCE7-10, Live Loads

Note b) Floors in garages or portions of a building used for the storage of motor vehicles shall be designed for the uniformly distributed live loads of
Table 4-1 or the following concentrated load: (1) for garages restricted to passenger vehicles accommodating not more than nine passengers,
3,000 lb (13.35 kN) acting on an area of 4.5 in. by 4.5 in. (114 mm by 114 mm); and (2) for mechanical parking structures without slab or deck
that are used for storing passenger vehicles only, 2,250 lb (10 kN) per wheel.