| |
ASTM Standard Reinforcing
Bars
|
Soft
Metric
Size
|
Nom
Diam
( mm)
|
Area
(mm2 )
|
Weight
Factors
|
Imperial
Size
|
Nom
Diam
(inches)
|
Area
in2
|
Weight
Factors
|
|
kg/m
|
kg/ft
|
lb/ft
|
lb/m
|
|
10
|
9.5
|
71
|
.560
|
.171
|
3
|
.375
|
.11
|
.376
|
1.234
|
|
13
|
12.7
|
129
|
.994
|
.303
|
4
|
.500
|
.20
|
.668
|
2.192
|
|
16
|
15.9
|
199
|
1.552
|
.473
|
5
|
.625
|
.31
|
1.043
|
3.422
|
|
19
|
19.1
|
284
|
2.235
|
.681
|
6
|
.750
|
.44
|
1.502
|
4.928
|
|
22
|
22.2
|
387
|
3.042
|
.927
|
7
|
.875
|
.60
|
2.044
|
6.706
|
|
25
|
25.4
|
510
|
3.973
|
1.211
|
8
|
1.000
|
.79
|
2.670
|
8.760
|
|
29
|
28.7
|
645
|
5.060
|
1.542
|
9
|
1.128
|
1.00
|
3.400
|
11.155
|
|
32
|
32.3
|
819
|
6.404
|
1.952
|
10
|
1.270
|
1.27
|
4.303
|
14.117
|
|
36
|
35.8
|
1006
|
7.907
|
2.410
|
11
|
1.410
|
1.56
|
5.313
|
17.431
|
|
43
|
43.0
|
1452
|
11.384
|
3.470
|
14
|
1.693
|
2.25
|
7.650
|
25.098
|
|
57
|
57.3
|
2581
|
20.239
|
6.169
|
18
|
2.257
|
4.00
|
13.600
|
44.619
|
Comparison of Steel
Grades
Soft
Metric |
Imperial |
|
Grade
|
MPa
|
Psi
|
Grade
|
MPa
|
Psi
|
|
300
|
300
|
43,511
|
40
|
257.79
|
40,000
|
|
420
|
420
|
60,716
|
60
|
413.69
|
60,000
|
|
520
|
520
|
75,420
|
75
|
517.11
|
75,000
|
Conversion Factors
|
To Metric
|
To Imperial
|
|
1/8 inch = 3.175 mm
|
|
|
1 inch = 25.4 mm
|
1 mm = 0.0394 inches
|
|
1 foot = 304.8 mm
|
1 meter = 3.2808 feet
|
|
1000 ft2 = 92.903 m2
|
100 m2 = 1076.39 ft2
|
|
1000 ft3 = 28.317 m3
|
10m3 = 353.14 ft3
|
|
1000 gal = 3.7854 m3
|
10m3 = 2.641.73
|
|
1 pound = 0.4536 kg
|
1 kg = 2.2046 pounds
|
|
1 psf = 4.88243 kg/m2
|
10 kg/m2 = 2.048 psf
|
|
1 pcf = 16.019 kg/m3
|
10 kg/m3 = 0.624 pcf
|
|
short ton = 907.18 kg
(2000 lbs.)
|
0.90718 = 2000 pounds
tonne
|
|
long ton = 1016 kg
(2240 lbs.)
|
1 tonne = 2204.6 pounds
|
|
1000 psi = 6.8948 MPa
|
1 MPa = 145.0368 psi
|
Newton (N) = kg
m/s2 = kilograms x 9.80665
Pascal (Pa) = N/m2 |
Courtesy of Applied Systems Associates, Inc.
- Metrics will be a breeze compared to the transition
period between measurement standards.
Do the following scenarios keep you awake at night?
- plans drawn up in imperial measure being
estimated, detailed, and supplied in metric measure
- bars detailed to metric lengths being sheared on
machinery that gauges in feet and inches
- new machinery built to metric specifications
being called upon to process orders from older jobs
that were detailed in imperial measure
- clearance, hook stock, lap stock, and bar
spacing -- all terms that can take on dual definitions
during the transition period
We recommend using the aSa Rebar System, which
eliminates these metrication problems automatically
and electronically. From
Estimating, CAD/Detailing, and Bar Listing to Production and Business
Systems, CRP &
aSa are your complete rebar solution.
Recommended End Hooks - All
Grades
|
Soft
Metric
Size
|
mm
|
Imperial Size
|
Inches
|
|
D
|
90°Hooks
|
180° Hooks
|
D
|
90°Hooks
|
180° Hooks
|
|
A or G
|
A or G
|
J
|
A or G
|
A or G
|
J
|
|
10
|
60
|
150
|
125
|
80
|
3
|
2.25
|
6
|
5
|
3
|
|
13
|
80
|
200
|
150
|
105
|
4
|
3.0
|
8
|
6
|
4
|
|
16
|
95
|
250
|
175
|
130
|
5
|
3.75
|
10
|
7
|
5
|
|
19
|
115
|
300
|
200
|
155
|
6
|
4.50
|
12
|
8
|
6
|
|
22
|
135
|
375
|
250
|
180
|
7
|
5.25
|
14
|
10
|
7
|
|
25
|
155
|
425
|
275
|
205
|
8
|
6.0
|
16
|
11
|
8
|
|
29
|
240
|
475
|
375
|
300
|
9
|
9.50
|
19
|
15
|
11.75
|
|
32
|
275
|
550
|
425
|
335
|
10
|
10.75
|
22
|
17
|
13.25
|
|
36
|
305
|
600
|
475
|
375
|
11
|
12.0
|
24
|
19
|
14.75
|
|
43
|
465
|
775
|
675
|
550
|
14
|
18.25
|
31
|
27
|
21.75
|
|
57
|
610
|
1050
|
925
|
725
|
18
|
24.0
|
41
|
36
|
28.50
|
Stirrup and Tie Hooks - All
Grades (General)
|
Soft Size
|
mm
|
Imperial Size
|
Inches
|
|
D
|
90° Hooks
|
135° Hooks
|
D
|
90° Hooks
|
135° Hooks
|
|
A or G
|
A or G
|
H approx
|
A or G
|
A or G
|
H approx
|
|
10
|
40
|
105
|
105
|
65
|
3
|
1.50
|
4
|
4
|
2.5
|
|
13
|
50
|
115
|
115
|
80
|
4
|
2.00
|
4.5
|
4.5
|
3
|
|
16
|
65
|
155
|
140
|
95
|
5
|
2.50
|
6
|
5.5
|
3.75
|
|
19
|
115
|
305
|
205
|
115
|
6
|
4.50
|
12
|
8
|
4.5
|
|
22
|
135
|
355
|
230
|
135
|
7
|
5.25
|
14
|
9
|
5.25
|
|
25
|
155
|
410
|
270
|
155
|
8
|
6.00
|
16
|
10.5
|
6
|
Stirrup and Tie Hooks -
All Grades (Seismic)
|
Soft Metric
Size
|
mm
|
Imperial Size
|
Inches
|
|
D
|
135° Seismic
|
D
|
135° Seismic
|
|
A or G
|
H approx
|
A or G
|
H approx
|
|
10
|
40
|
110
|
80
|
3
|
1.50
|
4.25
|
3
|
|
13
|
50
|
115
|
80
|
4
|
2.00
|
4.5
|
3
|
|
16
|
65
|
140
|
95
|
5
|
2.50
|
5.5
|
3.75
|
|
19
|
115
|
205
|
115
|
6
|
4.50
|
8
|
4.5
|
|
22
|
135
|
230
|
135
|
7
|
5.25
|
9
|
5.25
|
|
25
|
155
|
270
|
155
|
8
|
6.00
|
10.5
|
6
|
 
Uncoated Seven Wire
Low-Relaxation Steel Strand for Prestressed Concrete
According to ASTM A 416
|
|
Diameter
|
Area
|
Weight
|
Breaking Strength
|
Min. Load
at 1% Extension (1)
|
Min.
Elongation to Fracture
|
Relaxation
1,000 h
|
Min.
Difference between center & outer wire
|
|
lb/
1000 ft
|
kg/
1000m
|
70%
CR
|
80%
CR |
|
in
|
mm
|
in2
|
mm2
|
lbf
|
KN
|
lbf
|
KN
|
%
|
%
|
%
|
in
|
mm
|
|
Grade 250
|
3/8
|
9.53
|
0.080
|
51.61
|
272
|
405 |
20,000
|
89.0
|
18,000
|
80.1
|
3.5
|
2.5
|
3.5
|
0.002 |
0.0508
|
|
7/16
|
11.11
|
0.108
|
69.68
|
367
|
548 |
27,000
|
120.1
|
24,300
|
108.1
|
3.5
|
2.5
|
3.5
|
0.0025
|
0.0635
|
|
1/2
|
12.70
|
0.144
|
92.90
|
490
|
730 |
36,000
|
160.1
|
32,400
|
144.1
|
3.5
|
2.5
|
3.5
|
0.003 |
0.0762
|
|
0.6
|
15.24
|
0.216
|
139.35
|
737
|
1,094 |
54,000
|
240.2
|
48,600
|
216.2
|
3.5
|
2.5
|
3.5
|
0.004 |
0.1016
|
|
Grade 270
|
3/8
|
9.53
|
0.085
|
54.84
|
290
|
432 |
23,000
|
102.3
|
20,700
|
92.1
|
3.5
|
2.5
|
3.5
|
0.002 |
0.0508
|
|
7/16
|
11.11
|
0.115
|
74.19
|
390
|
582 |
31,000
|
137.9
|
27,900
|
124.1
|
3.5
|
2.5
|
3.5
|
0.0025 |
0.0635 |
|
1/2
|
12.70
|
0.153
|
98.71
|
520
|
775 |
41,300
|
183.7
|
37,170
|
165.3
|
3.5
|
2.5
|
3.5
|
0.003 |
0.0762 |
|
0.6
|
15.24
|
0.217
|
140.00
|
740
|
1,102 |
58,600
|
260.7
|
52,740
|
234.6
|
3.5
|
2.5
|
3.5
|
0.004
|
0.1016 |
|
SPE-
CIAL
|
STD
|
9/16
|
14.28
|
0.191
|
123.44
|
651
|
989 |
51,700
|
229.8
|
46,530
|
206.8
|
3.5
|
2.5
|
3.5
|
0.0035 |
0.0889
|
|
SUPER
|
1/2
|
12.70
|
0.162
|
104.3
|
550
|
819 |
45,000
|
200
|
40,500
|
180.0
|
3.5
|
2.5
|
3.5
|
0.0030
|
0.0762
|
|
9/16
|
14.28
|
0.194
|
125.1
|
660
|
982 |
54,000
|
240
|
48,600
|
216.0
|
3.5
|
2.5
|
3.5
|
0.0035 |
0.0889
|
(1) Calculated as 90%
Breaking Strength
  
 
|
