Metric Rebar Call-outs
Metric Rebar Call-outs
(OP)
What's "12Ø20" mean?
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RE: Metric Rebar Call-outs
should be, as an example:
12 T20 20 160
which would be 12 x 20mm diameter high yield bars, barmark 20 (then from the bending schedule you can get the shape code and full dimensions) at 160mm spacing
So in summary I don't know what it means
RE: Metric Rebar Call-outs
The call-out in particular referred to slab reinforcing. By counting up the dots representing individual rebars, the twelve (12) referred to 12 bars per meter. This was consistent with other similar call-outs on the drawings (these aren't shop drawings). And like those other similar call-outs, the Ø20 I took to mean "diameter - 20" as in 20 mm diameter. The only problem was, my handy reference card from ASTM doesn't have a 20 mm bar; it has a 19 bar...
RE: Metric Rebar Call-outs
RE: Metric Rebar Call-outs
RE: Metric Rebar Call-outs
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The one thing I have learned is that you must know the standard for the particular country in which you are working.
RE: Metric Rebar Call-outs
RE: Metric Rebar Call-outs
10M - 11.3 mm dia - 100 mm^2
15M - 16.0 mm dia - 200 mm^2
20M - 19.5 mm dia - 300 mm^2
etc...
The US metric sizes are also nominal designations, such as #10 which has an actual diameter of 9.5 mm which in turn is a hard (mostly) conversion from the US customery unit size of 0.375 inches. US bar production is still to the old sizes in inches.
Presumably some other countries use nominal sizes for similar reasons.