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RE: RR Tie retaining walls

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The American Wood Preservers Institute has published design examples in
the past for this sort of thing.  In particular "Designing Retaining
Walls, Bulkheads and Seawalls of Treated Lumber".  It was a reprint from
"Wood Preserving News," Aug-Sept 1966,  It includes an example using
poles.  AWPI has a web site at

Ed Marshall, PE
Simons Engineering

> -----Original Message-----
> From:	Kathleen  A. O'Brien [SMTP:wildwoman1(--nospam--at)]
> Sent:	Sunday, May 31, 1998 5:19 PM
> To:	SEAOC Forum
> Subject:	RR Tie retaining walls
> HI All:
> I have an interesting problem.
> A client wants to put in a wall consisting of Rail Road Ties spanning
> between columns. The columns will probably be fat telephone poles. The
> RR
> ties will of course be pressure-treated.
> This particular developer did this a decade or so ago, and got it OK'd
> by
> the City (Thousand Oaks). I took a photo of the existing wall and it
> looks
> really nice, and appears to have held up quite well. Of course the
> Code has
> changed a few times since then.
> Questions:
> 1. Does anyone know how easy it would be to get RR ties and telephone
> poles?
> 2. Does anyone have any ideas on what allowable stresses would befor
> RR
> ties? I would probably assume stresses for redwood if I couldn't get
> any
> information.
> Thanks for any input
> Kate O'Brien, P.E.
> Simi Valley, CA