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FLAT BBQ BOWING

General welding questions that dont fit in TIG, MIG, Stick, or Certification etc.

FLAT BBQ BOWING

Postby Lisa » Wed Jul 12, 2017 12:34 am

Hi, My husband built a basic propane flat grill BBQ with 1/4″ carbon steel and three burners. So proud! He turned it on high to test it, and in about two minutes the flat top began to bow a 1/2 inch high. The burners are about an inch below the plate. Are they too close or is there another cause of this? I think it went down with cooling, but has the bowing weakened the plate?

Lisa
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Re: FLAT BBQ BOWING

Postby Poland308 » Wed Jul 12, 2017 5:22 pm

The bow has stretched and stressed the metal. 1 inch may or may not be too close. That would be determined by btu output, burner size in area, and burner design. Warping is a side effect of uncontrolled expansion. If you were to simply remove the warped top and lay a new plate down but not secure it, so that it has room to expand then the burner location may be fine.
I have more questions than answers

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Re: FLAT BBQ BOWING

Postby Lisa » Wed Jul 12, 2017 7:42 pm

Thanks for your insight!
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