Mar 18 2012, 04:20 PM
I don't think market is using R6 (6mm) but is CQ R5.8 (actual diameter about 5.4 - 5.5mm only). Normally, this size is use for ring. However, some of them also using CQ8.3 (actual diameter about 7.9 - 8mm) for ring and it's depend on your building requirement.
Diameter of reBar in columns & beams, house construction standards & practice
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