Development Lengths Tables

Development Length in Tension

# 6 and Smaller Bars =

Ref: ACI-318-08, Clause 12.2.2

# 7 and Larger Bars =

Top Bars where horizontal reinforcement is placed such that more than 12 in of concrete is cast below the development length or splice, Ref: ACI-318-08, Clause 12.2.4

Fy = 60000 psi

Development length in tension (in)

#3 #4 #5 #6 #7 #8 #9 #10 #11

3000 21 28 36 43 62 71 80 89 984000 18 25 31 37 54 62 69 77 855000 17 22 28 33 48 55 62 69 76

Fy = 414 Mpa

Development length in tension (mm)

#3 #4 #5 #6 #7 #8 #9 #10 #11

21 533 711 914 1092 1575 1803 2032 2261 248928 457 635 787 940 1372 1575 1753 1956 215935 432 559 711 838 1219 1397 1575 1753 1930

Other Bars where Ref: ACI-318-08, Clause 12.2.4

Fy = 60000 psi

Development length in tension (in)

#3 #4 #5 #6 #7 #8 #9 #10 #11

3000 16 22 27 33 48 55 62 68 754000 14 19 24 28 42 47 53 59 655000 13 17 21 25 37 42 48 53 58

Fy = 414 Mpa

Development length in tension (mm)

#3 #4 #5 #6 #7 #8 #9 #10 #11

21 406 559 686 838 1219 1397 1575 1727 190528 356 483 610 711 1067 1194 1346 1499 165135 330 432 533 635 940 1067 1219 1346 1473

* ld shall not be less than 12 in (Clause: 12.2.1)

BarFc' (psi)

BarFc' (Mpa)

BarFc'(psi)

BarFc'(Mpa)

Development Length in Compression

= AND Ref: ACI-318-08, Clause 12.3.2

= * units of 0.0003 are Sq-in/lb

Whichever is Larger

Fy = 60000 psi

Development length in compression (in)

#3 #4 #5 #6 #7 #8 #9 #10 #11

3000 8 11 14 16 19 22 25 27 304000 8 9 12 14 17 19 21 24 265000 8 9 11 14 16 18 20 23 25

Fy = 414 Mpa

Development length in compression (mm)

#3 #4 #5 #6 #7 #8 #9 #10 #11

21 209 278 348 417 487 556 626 696 76528 203 241 301 361 422 482 542 602 66335 203 229 286 343 400 457 514 572 629

* ldc shall not be less than 8 in (Clause: 12.3.1)

BarFc'(psi)

BarFc'(Mpa)

Splice Lengths Tables

Splice Length in Tension (Class-B)

# 6 and Smaller Bars = x 1.3

# 7 and Larger Bars = x 1.3Ref: ACI-318-08, Clause 12.15.1

Top BarsFy = 60000 psi

Splice length in tension (in)

#3 #4 #5 #6 #7 #8 #9 #10 #11

3000 27 36 47 56 81 92 104 116 1274000 23 33 40 48 70 81 90 100 1115000 22 29 36 43 62 72 81 90 99

Fy = 414 Mpa

Splice length in tension (mm)

#3 #4 #5 #6 #7 #8 #9 #10 #11

21 693 925 1189 1420 2047 2344 2642 2939 323628 594 826 1024 1222 1783 2047 2278 2543 280735 561 726 925 1090 1585 1816 2047 2278 2510

Other BarsFy = 60000 psi

Splice length in tension (in)

#3 #4 #5 #6 #7 #8 #9 #10 #11

3000 21 29 35 43 62 72 81 88 984000 18 25 31 36 55 61 69 77 855000 17 22 27 33 48 55 62 69 75

Fy = 414 Mpa

Splice length in tension (mm)

#3 #4 #5 #6 #7 #8 #9 #10 #11

21 528 726 892 1090 1585 1816 2047 2245 247728 462 627 792 925 1387 1552 1750 1948 214635 429 561 693 826 1222 1387 1585 1750 1915

analysis over the entire length of the splice" or "one half or less of the total reinforcement is spliced within the required lap length". (Clause: 12.15.2)

* Splice length in tension shall not be less than 12 in (Clause: 12.15.1)

BarFc'(psi)

BarFc'(Mpa)

BarFc'(psi)

BarFc'(Mpa)

* Splice length shall be Class-A splice if "the area of reinforcement provided is at least twice that required by

* when bars of different sizes are lap spliced in tension, splice length shall be the larger of Development length of

larger bar and tension lap splice length of smaller bar. (Clause: 12.15.3)* Splices in adjacent bars shall be staggered at least 30 in. (Clause 12.15.6)

Splice Length in Compression

Splice length = Ref: ACI-318-08, Clause 12.16.1

* units of 0.0005 are Sq-in/lb

* Splice length in compression shall not be less than 12 in (Clause: 12.16.1)* if fc' > 3000 psi : lap length is to be increased by 1/3 (Clause: 12.16.1)

Fy = 60000 psi

Splice length in compression (in)

#3 #4 #5 #6 #7 #8 #9 #10 #11

3000 12 15 19 23 26 30 34 38 414000 12 15 19 23 26 30 34 38 415000 12 15 19 23 26 30 34 38 41

Fy = 414 Mpa

Splice length in compression (mm)

#3 #4 #5 #6 #7 #8 #9 #10 #11

21 305 381 476 572 667 762 857 953 104828 305 381 476 572 667 762 857 953 104835 305 381 476 572 667 762 857 953 1048

BarFc'(psi)

BarFc'(Mpa)

Splice length#3 #4 #5 #6 #7 #8 #9 #10 #11

3000

4000

5000

Development length#3 #4 #5 #6 #7 #8 #9 #10 #11

3000

4000

5000

BarFc'

BarFc'