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How to calculate lap,bond and hook length for preparing bar
Bending schedule ?
- 11 Answers
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Answer / arun sangwan
To calculate the lap length-48*D
For calculating hook & bend -As per Is 2502,The anchorage value of the of bend shall be taken as 4*D of the bar for each 45 Degree bend and for the U type hook its always taken as 16* D.
For the bond length(Development Length)-Ld-It is calculated by the formula. and it includes all the values of the anchorages.
| Is This Answer Correct ? | 317 Yes | 77 No |
Answer / naveen m
hook length is 5*d lap length can been given at the end L/7
and at continuous L/4.
| Is This Answer Correct ? | 134 Yes | 71 No |
Answer / syed mohd. fareed
Hook - 9d (d- dia of bar)
Bent up - 0.42D (D- centre to centre vertical distance between bent portion and bar )
Lap - 50d (d-dia of bar)
| Is This Answer Correct ? | 50 Yes | 12 No |
Answer / mohammed aijaz hussain.
Lap length: 45 diameter of the bar (in compression member)
50 diameter of the bar (in tension member)
Bond length: 24 diameter of the bar
Hook length: 12 diameter of the bar
| Is This Answer Correct ? | 68 Yes | 31 No |
Answer / lalit kumar singh
Lap lenght:- for liquid structure- 50d
for another structure-40d
(like column, beam, slab)
For stirrups Hook:- 2x10d
for corner bend :- (-3d) upto 12dia.
(-4d)above 12dia.
| Is This Answer Correct ? | 51 Yes | 22 No |
Answer / vinod
Lap length of bar depends on grade of concrete and design
bond. Owing to the Grade of concretes:
Grade of concrete) Tension Compression
M15 56.4d 45.15d
M20 47d 37.6d
M25 40.3d 32.25d
M30 37.06d 30.1d
For stirrups Hook length, it will be (-)2x10d
Bend, it will be (-3d) upto 12dia.
(-4d) above 12dia.
| Is This Answer Correct ? | 35 Yes | 12 No |
Answer / muthuraj s
it dedpend upon design basics please follwing SP34 & IS2502
| Is This Answer Correct ? | 28 Yes | 13 No |
Answer / bharat hire
Lap length of bar depends on grade of concrete and design
bond. Owing to the Grade of concretes:
Grade of concrete) Tension Compression
M15 56.4d 45.15d
M20 47d 37.6d
M25 40.3d 32.25d
M30 37.06d 30.1d
For stirrups Hook length, it will be (-)2x10d
Bend, it will be (-3d) upto 12dia.
(-4d) above 12dia.
| Is This Answer Correct ? | 18 Yes | 10 No |
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