Re: Would welding the steel in re-enforced concrete add any value?



Hi Jon,
The bars are normally tied together with wire to allow them movement. I think welding would make them to rigid and could probably cause problems.
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On 8 Jul 2003 16:27:48 -0700, snipped-for-privacy@alcatel.co.uk (Jon Weaver) wrote:

They're not. The point of steelwork in concrete is to compress the concrete by pre-tensioning the steelwork. For this you can treat each steel rod as a piece of flexible string - it doesn't matter what happens, so long as it supports this tension. So any attempt to weld the steel and make it "stiffer" as a structure is basically pointless.
Steel is often pre-welded into a grid, but that's just for convenience in handling. Similarly the use of wire ties to hold it in the right position.
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On Fri, 11 Jul 2003 00:38:01 +0100, Andy Dingley

I knew it was to add tensile strength but thought the compressing function was only in pre stressed concrete.
AJH
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On Sat, 12 Jul 2003 13:20:40 +0100, Andrew Heggie < snipped-for-privacy@dtn.invalid wrote:

Yes, _pre-_tensioning was inaccurate wording on my part. That's just if they're tensioned whilst curing. The others only come into force if there's a tensile force or bending moment applied to the concrete.
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