Rebar 101

REBAR MARKING

Reinforcing bar contains markings that provide information about the size, grade and steel alloy of the rebar, as well as its point of origin. The diagram below demonstrates how to interpret these markings. For more information, visit the CRSI bar markings page.

chart-1

REBAR PROPERTIES

The chart below shows a snapshot of the physical properties of rebar. For a full guide of ASTM, non-ASTM and Canadian rebar grades, view our rebar properties spec sheet.

chart-2

Rebar Chart

  • U.S. Standard Bar
  • Matric Bar
  • Matric Bar is:
  • Bar Size
  • Area Sq. Inches
  • Bar Size
  • Area Sq. Inches
  • #3
  • .11
  • 10m
  • .16
  • 45% larger*
  • #4
  • .20
  • 10m
  • .16
  • 20% smaller
  • #4
  • .20
  • 15m
  • .31
  • 55% larger
  • #5
  • .31
  • 15m
  • .31
  • Same
  • #6
  • .44
  • 20m
  • .47
  • 6.8% larger
  • #7
  • .60
  • 20m
  • .47
  • 22% smaller
  • #7
  • .60
  • 25m
  • .78
  • 30% larger
  • #8
  • .79
  • 25m
  • .78
  • 1.3% smaller
  • #9
  • 1.00
  • 30m
  • 1.09
  • 9% larger
  • #10
  • 1.27
  • 30m
  • 1.09
  • 14% smaller
  • #10
  • 1.27
  • 35m
  • 1.55
  • 22% larger
  • #11
  • 1.56
  • 35m
  • 1.55
  • 0.6% smaller
  • #14
  • 2.25
  • 45m
  • 2.33
  • 3.5% larger
  • #18
  • 4.00
  • 55m
  • 3.88
  • 3.0% smaller
  • *NOTE: % Difference is based upon area of rebar in square inches.

RABER WEIGHTS

  • Bar Size
    Desiganation*
  • Weight
    (LBS/FOOT)
  • Bar Diameter
    (INCHES)
  • Cross-Sectional Area (SQ. IN.) Per FT.
    • AT 12″ C.C.
    • AT 6″ C.C.
  • #3
  • 0.367
  • 0.375
  • 0.11
  • 0.22
  • #4
  • 0.668
  • 0.500
  • 0.20
  • 0.40
  • #5
  • 1.043
  • 0.625
  • 0.31
  • 0.62
  • #6
  • 1.502
  • 0.750
  • 0.44
  • 0.88
  • #7
  • 2.044
  • 0.875
  • 0.60
  • 1.20
  • #8
  • 2.670
  • 1.000
  • 0.79
  • 1.58
  • #9
  • 3.400
  • 1.128
  • 1.00
  • 2.00
  • #10
  • 4.300
  • 1.270
  • 1.27
  • 2.54
  • #11
  • 5.313
  • 1.410
  • 1.56
  • 3.12
  • #14
  • 7.650
  • 1.693
  • 2.25
  • 4.50
  • #18
  • 13.600
  • 2.257
  • 4.00
  • 8.00