Actual size of #18J rebar
Actual size of #18J rebar
(OP)
I've specified #18J rebar many times for tubular-steel pole anchor bolts. I know they are #18 "Jumbo" bars, and as I understand it they are rolled from a slightly larger stock bar. The deformations at the end are then turned down/shaved off back to 2.25" diameter, and the threads are rolled into this smooth area to fit a standard 2.25" UNC nut. If you don't start with a larger bar, you cannot fully develop standard 2.25" UNC threads because of the deformations.
My question is, what is the diameter/area of the "slightly larger" bar? I can't find any standard specifications. Is an 18J a standard size or does it vary by manufacturer?
Thanks,
My question is, what is the diameter/area of the "slightly larger" bar? I can't find any standard specifications. Is an 18J a standard size or does it vary by manufacturer?
Thanks,





RE: Actual size of #18J rebar
I won't mention the source, (he may not want his name out here), but he's reliable.
RE: Actual size of #18J rebar
If you are in the business and do substation structure design, you might look at ASCE 113 if you haven't already. It is due for an update and we are looking for new members.
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