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Bar Diameters

U.S. Standard Diameters with Imperial Specifications

      Nominal Dimensions

Bar Size

Imperial

Bar Size

Soft Metric

Actual Diameter (in) Nominal Diameter (in) Area (in2) Weight (lb/ft)
#3  10mm 0.4375 0.3750 0.11 0.376
#4  13mm 0.5625 0.5000 0.20 0.668
#5  16mm 0.6875 0.6250 0.31 1.043
#6  19mm 0.8750 0.7500 0.44 1.502
#7  22mm 1.0000 .08750 0.60 2.044
#8  25mm 1.1250 1.000 0.79 2.670
#9  29mm 1.2500 1.1280 1.00 3.400
#10  32mm 1.4375 1.2700 1.27 4.303
#11  36mm 1.6250 1.4100 1.56 5.313
#14  43mm 1.8750 1.6930 2.25 7.650
#18  57mm 2.5000 2.2570 4.00 13.600

U.S. "Soft Metric" Diameters with Metric Specifications

      Nominal Dimensions

Bar Size

Soft Metric

Bar Size

Imperial

Actual Diameter (mm) Nominal Diameter (mm) Area (mm2) Weight (kg/m)
10mm  #3 11.10 9.525 71 .5610
13mm #4 14.30 12.700 129 .996
16mm #5 17.50 15.875 200 1.556
19mm #6 22.20 19.050 284 2.24
22mm #7 25.40 22.225 387 3.049
25mm #8 28.60 25.400 509 3.982
29mm #9 31.80 28.650 645 5.071
32mm #10 36.50 32.260 819 6.418
36mm #11 41.30 35.810 1006 7.924
43mm #14 47.60 43.000 1452 11.41
57mm #18 63.50 57.330 2581 20.284

Source

CRSI Manual of Standard Practice - 2009 Edition - get the guide now


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