On 12/1/2013 1:23 PM, Matt wrote:
Recent, commercial rebar cages ordered with the towers have come through
welded instead of tied.
I have the wire, but it's a whale of a lot easier to weld it. If it's
good enough for the manufacturer, then it's good enough for me.
Be aware that normal grade rebar should not be welded - the heat destroys
its strength. There is a separate grade of rebar available for welding.
That said, in a crank-up tower application the foundation serves as ballast,
so is not much tensile stress developed in the concrete - except in the
vicinity of the anchor bolt embedment.
There is no anchor bolt assembly in this base. The tower bolts to 1/2 X
3 X 25: steel plates (ears) welded to 60" long # 10 rebar, and this has
the rest of the rebar cage fastened to it in many places.
73
Roger (K8RI)
Matt
KM5VI
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