Eleven standard sizes of reinforcing bars are in use
rebar could be procured locally and could be metric.
today. Table 7-1 lists the bar number, area in square
Table 7-3 is given for comparison. Remember that bar
inches, weight, and nominal diameter of the 11 standard
numbers are based on the nearest number of
sizes. Bars No. 3 through 11 and 14 and 18 are all
one-eighth inch included in the nominal diameter of
deformed bars. Table 7-2 lists the bar number, area in
the bar. To measure rebar, you must measure across
square inches and millimeters, weight in pounds per foot
the round/square portion where there is no
as well as kilograms per meter, and nominal diameter of
deformation. The raised portion of the deformation is
the 8 standard metric sizes. At various sites overseas,
not measured when measuring the rebar diameter.
Table 7-1.—U.S. Standard Reinforcing Bars
U.S. Standard Reinforcing Steel Bars
Bar Size
Area Square
Weight lb
Diameter
Designation
Inches
Per Foot
inches
mm
#3
.11
.376
.375
9.53
#4
.20
.668
.500
12.7
#5
.31
1.043
.625
15.88
#6
.44
1.502
.750
19.05
#7
.60
2.044
.875
22.23
#8
.79
2.670
1.000
25.40
#9
1.00
3.400
1.128
28.58
#10
1.27
4.303
1.270
31.75
#11
1.56
5.313
1.410
34.93
#14
2.25
7.650
1.693
43.00
#18
4.00
13.600
2.257
57.33
Table 7-2.—Metric Reinforcing Bars
METRIC REINFORCING STEEL BARS
BAR SIZE
AREA
WEIGHT
DIAMETER
DESIGNATION
Sq. Inches
Sq. mm
Lb Per Ft
KG/M
Inches
mm
10m
.16
100
.527
.785
.445
11.3
15m
.31
200
1.054
2.355
.630
16.0
20m
.47
300
1.563
2..355
.768
19.5
25m
.78
500
2.606
3.925
.992
25.2
30m
1.09
700
3.649
5.495
1.177
29.9
35m
1.55
1000
5.213
7.850
1.406
35.7
45m
2.33
1500
7.820
11.775
1.710
43.7
55m
3.88
2500
13.034
19.625
2.220
56.4
7-3
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