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Re: Parking deck

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If after all the best pencil sharpening, the calculations still don't
"work", then try shoring the slab. A few strategicly located 4x4s, driven
snug with wedges top or bottom, might just do the trick.

Mark Ketchum - Berkeley, California

>From: "Laura Watson" <lwatson(--nospam--at)>
>To: <seaint(--nospam--at)>
>Subject: Re: Parking deck
>Date: Fri, 30 Mar 2001 17:24:04 -0500
>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