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# Re: Deflection calculation for Wheel Loads on Timber Bridges

• To: <seaoc(--nospam--at)seaoc.org>
• Subject: Re: Deflection calculation for Wheel Loads on Timber Bridges
• From: "Leonid Shectman" <leonid(--nospam--at)wgn.net>
• Date: Sat, 11 Apr 1998 18:21:20 -0700

```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 www.atir.com. Try bridge design.

Leonid Shectman P.E.

----------
> From: Bdpooley <Bdpooley(--nospam--at)aol.com>
> To: seaoc(--nospam--at)seaoc.org
> 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,
HS-20
> 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
also
> gives the maximum live load deflection. For longer spans, the deflection
would
> be based on 2 wheel loads as AASHTO specifications require.
>
> I have looked for software on the web, but have not found a reasonably
priced
> package that will perform the math. One engineer has suggested that a
software
> program named "PC Bridge" can do the work. Is anyone familar with this
> program?
> If so, do you know who to contact about it?
>