On 1/3/14 12:05 PM, David Gilbert wrote:
By the way, while I totally understand why you'd want to tack weld the
bolts to the rebar, I've never thought much of welded rebar cages in
general. True weldable rebar (the stuff that is supposed to hold it's
strength after welding) is expensive and harder to get. The 40,000 PSI
stuff you can get at Lowes and Home Depot comes from indeterminate
source material (a mixture of washing machine chassis, old bed springs,
car frames, salvaged rebar, etc) and almost certainly will not weld with
consistent strength, although you can buy better 60,000 PSI stuff from
construction supply places.
Yeah, but if you're using rebar from who knows what kind of metal, are
you really concerned about whether it retains the strength when you weld it?
As I recall, about as weak as steel gets is 30-40 ksi.. Unless your
welding physically damages the steel, I don't know how much lower you
can go.
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