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TSS v HSS

TSS v HSS

TSS v HSS

(OP)
are TSS and HSS sections the same? if not what are the differences?  

RE: TSS v HSS

(OP)
I meant to say TS, not TSS

The reason I ask is becuase RISA has the option of using  HSS and TU sections

HSS matches AISC

TU does not

ie, according to RISA a HSS 7x5x1/8 has a wall thickness of 0.116" but a TU7x5x1/8 has a wall thickness of 0.125"

I have never seen TU called out on a DWG, but I have seen TS

RE: TSS v HSS

HSS, or Hollow Structural Section, has replaced TS, aka Tubular Section, in the AISC nomenclature.

I'm not familiar with the TU name...


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RE: TSS v HSS

I have RISA as well, and I have never understood why they have HSS sections AND TU sections.

DaveAtkins

RE: TSS v HSS

Swearingen is right. The "old" green steel book has TS sections and pipes. The new black book has HSS sections, and round hollow sections (pipes) also noted as being HSS sections. There are some minor differences in wall thickness between SOME TS and HSS section, suggesting a tightening of tolerances or maybe even an attempt a "metrification". Please note the round HSS sections. It suggests that the pipes will be going away too.

Old CA SE

RE: TSS v HSS

(OP)
Thanks!

RE: TSS v HSS

To my understanding, the HSS shapes were devised because most mills were creating TS shapes at the low end of the tolerance for the wall thickness, thus creating shapes with smaller section property values than what was given by the nominal wall thickness.  The HSS designation uses a reduced wall thickness to calculate the section properties.  If I remember correctly, the design wall thickness is 92% of the nomimal wall thickness called for in the shape designation.

Nick Deal, P.E.
Michael Brady Inc.
http://www.michaelbradyinc.com
 

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