Old Welded Wire Fabric designation: 12x4-10/6

[Ingenuity]

I have a project documented in late 1970's and constructed in probably early 1980's with the following WWF designation:

12x4-10/6: Implying 10 gage wire long't @ 12" spacing and 6 gage wire transverse at 4" spacing.

BUT field measurement of the actual wire dia and spacing is 0.22" dia @ 5.5" transverse, and 0.14" dia @ 11.5" which sort of equates to 5 gage @ 5.5" transverse and 9 gauge @ 11.5". Off course there are several steel gage measurement standards!

Anyone ever seen such odd-ball wire gage of 5 and 9, and such spacings?

It is a precast/prestressed solid plank bottom reinforcement situation.

 

[JedClampett]

My experience with WWF is, no matter what size I pick from the back of ACI, the contractor can't get it. So they double up some size they can get or I just accept something close.
I suspect that this was happening back in the 1970's and probably the 1870's.

 

[Ingenuity]

Yeh, thanks Jed.

I too suspect it was a case of what the precaster had in-stock, or could purchase. Just that the wire spacings are very oddball.