How to decide the Lap Length in Steel Reinforcement

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How to decide the Lap Length in Steel
Reinforcement

Question Posted / palavalasa

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How to decide the Lap Length in Steel Reinforcement..

Answer / yogesh jadhav

as per IS 456 2000
development length formula is Ld=0.87fyd(dia)/4tbd
tbd for various concrete is M20=1.2 m25=1.4 m30=0.5 m35=1.7
m40 and above=1.9
for deform bars 60%increase the value of tbd for compression it is increse by 25%
for example m25 grade concrete and fy 415
ld=0.87*415*D/4*1.4*1.6=40.29D
for m25 and fy=500 ld=48.54D approx 50D
anchorage length=Ld+2D
straight anchorage length=SAL=AL+8D

Is This Answer Correct ?

79 Yes

10 No

How to decide the Lap Length in Steel Reinforcement..

Answer / sagar tiwari

lap length formula=d*50=mm

for example=12*50=600mm is the lap length of 12 mm bar

(d is the dia of bar)

Is This Answer Correct ?

81 Yes

22 No

How to decide the Lap Length in Steel Reinforcement..

Answer / sjtbehera

Lap length decided by devlopment length of the steel and grade of concrete. 50D generally taken as thumb rule in m20 grade. In m25 grade it is 41d.

Is This Answer Correct ?

27 Yes

9 No

How to decide the Lap Length in Steel Reinforcement..

Answer / bunty sharma

Developing length generally depends on the grade of concrete and grade of reinforcement.And it is decided by the given formula on the basis of IS code;456 :2000
Ld=0.87fyd/4tbd

Is This Answer Correct ?

19 Yes

2 No

How to decide the Lap Length in Steel Reinforcement..

Answer / bhushan08

46D
Where D is the dia of steel bar,

Is This Answer Correct ?

12 Yes

11 No

How to decide the Lap Length in Steel Reinforcement..

Answer / harshit

IN horizontal lap is 39.5 in vertical lap is 49.5 in m25 grade