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Structural Concrete - Hassoun

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Appendix B Design Tables (SI Units) 1011<br />

Table B.9(b) Development Length l d<br />

/d b<br />

for Tension Bars and f y<br />

= 400 MPa (α = β = λ = 1.0)<br />

Development Length l d<br />

/d d<br />

(mm)—Tension Bars<br />

f ′ c<br />

= 20 MPa<br />

f′<br />

c<br />

= 30 MPa<br />

Bar Number Bar Diameter (mm) Conditions Met Others Conditions Met Others<br />

10M 11.3 Ê510 Ê765 Ê415 Ê620<br />

15M 16.0 Ê720 1080 Ê585 Ê875<br />

20M 19.5 Ê880 1320 Ê710 1070<br />

25M 25.2 1410 2120 1160 1740<br />

30M 29.9 1675 2510 1375 2065<br />

35M 35.7 2000 3000 1640 2465<br />

Table B.10<br />

Designations, Areas, and Mass of Bars<br />

Nominal Dimensions<br />

Bar Number Diameter (mm) Area (mm 2 ) Mass (kg/m)<br />

10 9.5 71 0.560<br />

13 12.7 129 0.994<br />

16 15.9 199 1.552<br />

19 19.1 284 2.235<br />

22 22.2 387 3.042<br />

25 25.4 510 3.973<br />

29 28.7 645 5.060<br />

32 32.3 819 6.404<br />

36 35.8 1006 7.907<br />

43 43.0 1452 11.38<br />

57 57.3 2581 20.24<br />

ASTM A615 M Grade 300 is limited to sizes no. 10 through no. 19; otherwise, grades are 400 or 500 MPa. (These bars are<br />

soft conversion of no. 3 to no. 18 in U.S. customary units.)<br />

Table B.11<br />

ASTM Standard Metric Reinforcing Bars<br />

Nominal Dimensions<br />

Bar-Size Designation (number) Diameter (mm) Area (mm 2 ) Mass (kg/m)<br />

10M 11.3 100 0.785<br />

15M 16.0 200 1.570<br />

20M 19.5 300 2.355<br />

25M 25.2 500 3.925<br />

30M 29.9 700 5.495<br />

35M 35.7 1000 7.850<br />

45M 43.7 1500 11.775<br />

55M 56.4 2500 19.625<br />

ASTM A615M grade 300 is limited to size 10 M through 20 M; otherwise, grades are 400 or 500 MPa.

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