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RE: W21x48 and W21x55 beams

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This came up once before so I will repeat my answer.
These were originally Canadian shapes -- there were
eight in all that were made only in Canada.  They were
W8x14,W10x16,W12x21,W18x41,W18x45,W21x48,W24x56 &
W24x61.  Imagine a W8x18,W10x22,W12x26,W18x50,W21x62,
W24x68 but with slightly thinner flanges and/or webs.
Anyway, Algoma the sole supplier of these decided to
get out of the structural shape business in 01 and some
American producers said they would continue to supply
these to the Can market.  They are more efficient than
their closest weight US shapes and so they are still
beingbproduced in some of those sizes--sometimes from
off-shore.  I guess some companies are trying to flog
them also in the US market.

On 22 Dec 2004 at 7:34, TED RYAN wrote:

> There is also a C12x20.7 that wasn't there before...
> -----Original Message-----
> From: Ken Peoples [mailto:kspeoples(--nospam--at)] 
> Sent: Wednesday, December 22, 2004 7:35 AM
> To: Steel Detail; Seaint
> Subject: W21x48 and W21x55 beams
> I know that some of you are going to read this and say "Wake up Ken,
> these have been out there for a while now", but just in case some of
> you don't know this, I feel obligated to share this: I am looking at a
> job to bid and I see W21x55 beams and I say to myself - "must be a
> W24x55 or W21x50".  Just in case, I check the LRFD 3rd edition and
> sure enough there are two beam sizes in there that I was not aware of
> - W21x48 and W21x55.  I knew that the big W44's were vastly different
> from the 9th edition, but I had not realized the changes to beams in
> the range that I use fairly often.  I will have to pencil these into
> my 9th edition!  Without me going through the entire list, are there
> any other new lighter (say less than 100 plf) wide flange members that
> I should know about?
> Best regards,
> Ken
> Kenneth S. Peoples, P. E.
> Lehigh Valley Technical Associates, Inc.
> 1584 Weaversville Road
> Northampton, PA 18067
> Phone: 610-262-6345
> Fax:610-262-8188
> Email: kpeoples(--nospam--at)

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