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Re: New Steel Designations

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It is not a rumor. We have been using the new designations for a while now. The
"Hollow Structural Sections Connections Manual" by AISC list the sizes and new

Please note that the the actual thickness of a 1/2" tube, for example, is not
actually 1/2". It is now listed as 0.465". This is actually what has been rolled
for years but the new manual now gives us the real properties.

Some examples of the new designations are:

Pipe     HSS 3.50 x 0.216   (new designation)      3" Std. Pipe    (old

Tube    HSS 6 x 6 x 1/4      (new designation)      TS 6 x 6 x 1/4    (old

I especially like the new designation for pipes. I am trying to get our
architects to use the new designation instead of calling out members like ' 11/2"
pipe '. What does that mean?
Nominal? Actual? Outside Diameter? What wall thickness?

Jim Kestner, P.E.
Green Bay, Wi.

MRodrig273(--nospam--at) wrote:

> There is a rumor going around that the steel industry is considering re-
> designating the Steel Pipes and Steel Tubes to HSS (Hollow Structural Steel).
> If this is so, could someone please direct me to where I can find some
> literature from the steel industry concerning this matter.
> Thanks in advance.
> -----------------------------------------------------
> Sincerely,
> Mr. Marlou B. Rodriguez
> Engineer
> Robert Englekirk Inc. (REI)
> Englekirk and Sabol  (ESI)
> 1130 North Nimitz Hwy #A215
> Honolulu, HI 96817-4579
> Note:  The comments that I write,
> are my own opinions and are not
> necessarily the opinions of REI or ESI
> -------------------------------------------------------