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Building Design and Construction Handbook - Merritt - Ventech!

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TABLE 9.4 ASTM St<strong>and</strong>ard Rebars<br />

Bar<br />

size no. a<br />

Diameter<br />

mm [in.]<br />

CONCRETE CONSTRUCTION 9.27<br />

Nominal dimensions b<br />

Cross-sectional<br />

area, mm 2<br />

[in. 2 ]<br />

Weight<br />

kg/m [lbs/ft]<br />

10 [3] 9.5 [0.375] 71 [0.11] 0.560 [0.376]<br />

13 [4] 12.7 [0.500] 129 [0.20] 0.994 [0.668]<br />

16 [5] 15.9 [0.625] 199 [0.31] 1.552 [1.043]<br />

19 [6] 19.1 [0.750] 284 [0.44] 2.235 [1.502]<br />

22 [7] 22.2 [0.875] 387 [0.60] 3.042 [2.044]<br />

25 [8] 25.4 [1.000] 510 [0.79] 3.973 [2.670]<br />

29 [9] 28.7 [1.128] 645 [1.00] 5.060 [3.400]<br />

32 [10] 32.3 [1.270] 819 [1.27] 6.404 [4.303]<br />

36 [11] 35.8 [1.410] 1006 [1.56] 7.907 [5.313]<br />

43 [14] 43.0 [1.693] 1452 [2.25] 11.38 [7.65]<br />

57 [18] 57.3 [2.257] 2581 [4.00] 20.24 [13.60]<br />

a Equivalent inch-pound bar sizes are the designations enclosed within brackets.<br />

b The equivalent nominal dimensions of inch-pound bars are the values enclosed within brackets.<br />

Table 9.5 shows the bar sizes <strong>and</strong> strength grades covered by ASTM Specifications<br />

A615/A615M <strong>and</strong> A706/A706M.* The grade number indicates minimum<br />

yield strength, MPa [ksi] of the steel. Grade 420 [60] billet-steel rebars, conforming<br />

to ASTM A615/A615M, are currently the most widely used type.<br />

Low-alloy steel rebars conforming to the ASTM A706/A706M Specification are<br />

intended for applications where controlled tensile properties are essential, for ex-<br />

TABLE 9.5 Rebar Sizes <strong>and</strong> Grades Conforming to ASTM<br />

Specifications<br />

Type of steel<br />

<strong>and</strong> ASTM<br />

specification Bar size numbers Grade*<br />

Billet steel<br />

A615/A615M<br />

Low-alloy steel<br />

A706/A706M<br />

* Minimum yield strength.<br />

10–19 [3–6]<br />

10–36, 43, 57 [3–11, 14, 18]<br />

19–36, 43, 57 [6–11, 14, 18]<br />

300 [40]<br />

420 [60]<br />

520 [75]<br />

10–36, 43, 57 [3–11, 14, 18] 420 [60]<br />

* Many of the ASTM specifications for steel reinforcement are in a dual units format—metric units <strong>and</strong><br />

inch-pound units. The designations of such specifications are also in a dual format, e.g., A615 / A615M. The<br />

metric units in the specification apply when ‘‘A615M’’ is specified. Similarly, inch-pound units apply under<br />

‘‘A615.’’<br />

Since rail-steel <strong>and</strong> axle steel reinforcing bars (ASTM A996 / A996M) are not generally available except<br />

in a few areas of the country, these types of bars are not discussed herein. Should the need arise to evaluate<br />

or specify rail-steel or axle-steel bars, ASTM Specification A996 / A996M should be reviewed.

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