Curved WT Beam 2

• May 18, 2016

1
• #2

jayrod12

Structural

Mar 8, 2011

6,243

When it comes to bending, I've always found it best to contact a few of the local fabricators to determine what is and isn't possible. This varies with location.

 

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• May 18, 2016

• #3

hokie66

Structural

Jul 19, 2006

23,032

jayrod is correct. No point in asking us, ask a fabricator, or a few.

 

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• May 18, 2016

• #4

KootK

Structural

Oct 16, 2001

18,428

Check out this article: Link.

In summary:

1) Use their recommended tool to figure out what might be possible with a W-shape rolled the hard way.
2) Assume, at worst, that your WT might be rolled as a W before being cut into a T.
3) Per jayrod, hokie, and the article, call a fabricator to confirm.

Or just skip to #3. Your call.

I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.

 

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• May 18, 2016

• #5

KootK

Structural

Oct 16, 2001

18,428

Now that I think on it, potentially rolling a W18 to a 5' radius the hard way sounds rather challenging.

I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.

 

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• May 18, 2016

• Thread starter
• #6

cpiedra23

Structural

Dec 8, 2012

16

thanks guys. i did contact a few and they basically said "hahahaha." cheers.

 

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• May 18, 2016

• #7

ColinPearson

Petroleum

May 1, 2011

142

KootK, REALLY hard is what I was immediately thinking. As a follow up, do you know if fabricators will even roll a WT (or ST) after it was already a "T"? I would assume htey'd roll a W (or S) and then rip it down, but I'm not sure.

 

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• May 18, 2016

• #8

KootK

Structural

Oct 16, 2001

18,428

I don't know the answer to that Colin. I was guessing that the rolling would occur as a W too. That would help with the stem buckling issue which I would think would cause all manner of headaches. It hurts my head to think of what the residual stress pattern would be for the member after you roll it an cut it.

I specified WT rolled the easy way for a curvy truss chord one time. No push back.

I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.

 

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• May 18, 2016

• #9

dhengr

Structural

Sep 22, 2009

4,669

Cpiedra23:
You might have better luck with a 12" channel with the toes in, or with a 12"x4" HSS. Depending upon how it is loaded and what it actually does, I would fabricate it with a 12" x .5" flange and a .5" thk. stem. I might allow that the stem be cut in two 90̊ sectors and welded back together to make up the full half circle.

 

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• May 18, 2016

• #10

KootK

Structural

Oct 16, 2001

18,428

I actually feel as though it should be possible to roll the WT as a WT with a suitable stem thickness. I've seen rolled angles of similar proportions. Maybe talk to these guys:Link. If necessary, try two angles bolted together back to back. Industrial chic damn it.

I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.

 

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• May 18, 2016

1
• #11

ColinPearson

Petroleum

May 1, 2011

142

Koot -thanks, just curious... I'd not really want to see that rolled WT either!

cpiedra23 - Can the architect handle some welding being present? You could get this entire thing cut out of one PL0.75" 5'x10' and weld it all up AND have enough drop left over to make a bomb-proof mailbox!. Just a thought.

 

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• May 18, 2016

• #12

canwesteng

Structural

May 12, 2014

1,674

Could you not heat it to relieve stress before buckling and then bend some more? Probably a real pain to do though

 

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• May 18, 2016

• #13

Tmoose

Mechanical

Apr 12, 2003

5,631

How many do you need?

I'd try it at home.

"Contraction as a friend in need" by Holt has some useful procedures and examples

http://www.linde-gas.com/internet.g...aper_Flame straightening_RZ_VIEW17_130445.pdf

These guys claim the bend Tees stem ni or stem out.

http://www.cmrp.com/tee_bending

 

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