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Re: Parking deck

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Why not check the members with just the loads from the forklifts applied in
lieu of 100 psf everywhere (and any other loads that will be present)? This
is assuming that while this equipment is being moved no other loading on
the ramp is taking place. Also using influence lines for the moving loads
can help determine the most critical load positions. 
Use the contact area of the forklift wheels and the axle loads to determine
how the loads are actually applied as the forklifts move down the ramp.

From: Brad Smith <bwsmail(--nospam--at)>
To: seaint(--nospam--at)
Subject: Parking deck
Date: Friday, March 30, 2001 4:28 PM

Dear colleagues, 

I would love your suggestions as to how one can transport a 14000 lb.
mechanical equipment down a parking deck ramp that was design with 100 psf
live load. The contractor is willing to break apart the equipment into
smaller components but still the heaviest component, generator, weights
5200 lb. 

The parking deck is cast-in place post-tensioned slab that spans 16 feet
(in direction of ramp) to transverse post-tensioned girders. 

One scenario I considered is to carry the generator on 2 wide flange beams
20 feet long with three fork lifts, making triangular shape in plan view.
Triangular shape is needed for stability going around corners and spread
the loads. The smallest fork-lift considered for the project weights 6000
lb. with foot print of 5 feet square. It's the fork lifts that is too heavy
but the contractor doesn't know how else to maneuver the equipment. 

I would appreciate any of your thoughts. 

Brad Smith, SE