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Re: Deflection calculation for Wheel Loads on Timber Bridges

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Recently, I was designed bridge for rail load and hwy load. For my design I
used program named "STRAP". I do not know if the "PC BRIDGE" can do the
work, but I found that the "STRAP" can do it very easy. The program can
calculate deflection with moving load for HS-25 or Cooper80 loads. You can
see it on web site Try bridge design.

Leonid Shectman P.E. 

> From: Bdpooley <Bdpooley(--nospam--at)>
> To: seaoc(--nospam--at)
> Subject: Deflection calculation for Wheel Loads on Timber Bridges
> Date: Friday, April 10, 1998 9:29 AM
> Problem: Calculate the live load deflection for a timber bridge deck for
> simple and continuous spans ranging from 8 feet to 34 feet for HS-15,
> and HS-25 loading. The specific timber bridge deck to be used is the
> longitudinal glulam deck system as described by wood industry brochures.
> For simple spans up to 28 feet, positioning a single wheel (point) load
at the
> midspan gives the maximum moment and others have told me that this is
> gives the maximum live load deflection. For longer spans, the deflection
> be based on 2 wheel loads as AASHTO specifications require. 
> I have looked for software on the web, but have not found a reasonably
> package that will perform the math. One engineer has suggested that a
> program named "PC Bridge" can do the work. Is anyone familar with this
> program?
> If so, do you know who to contact about it?
> Thanks for your help.
> Bruce Pooley
> Timber Design
> 3448 South Newland Court
> Lakewood, CO 80227