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

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)

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.

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

Answer / bhushan08

46D
Where D is the dia of steel bar,

Answer / harshit

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

Answer / shekarpuppala127

49d where d is dia of bar

I'm diploma civil engineer. My question is what better after diploma 1- BE/B.TECH 2.EXPERIENCE Pls.suggest.

1 Answers   L&T,

how much weight of 20 mm aggregate in bras?

3 Answers  

Can we use concrete of slump cone in cube casting in which we have already measured slump?

0 Answers  

a)If column dimensions are 250*400mm , what will be cutting length for 8mm stirrups and how to calculate it? b) If beam dimensions are 200*400mm , beam coveris 25mm , slab cover is 20mm , what will be the cutting length for stirrups? c)Column dimensions are 250*400mm , reinf. is 12nos. bar of 16mm dia , stirrups provided are two legged, what will be the length of each ring? Regards

27 Answers   Alfaraa, Speco, Supertech, Welspun,

In a beam tension is always at the bottom but sometimes when we design using staad we get more number of rebars at the top compression zone Why?

1 Answers  

a wall having area 100 sqft and bricks size 19cm*9cm*9cm so how many bricks required...

14 Answers   Jain Group,

what is the quantity of block work required to construct a compound wall of 6" thick,and 212 lenght

0 Answers  

What is the difference between BC and SDBC

1 Answers  

which grade of steel is better for construction of building under earthquake zones ? why?

2 Answers   Noah Solutions,

Draw the cross section of a boundary wall and label its part with detailing?

0 Answers   Rites,

why no deduction for steel is made in the volume of concrete?

3 Answers  

A floor has to be removed partially with block work tying floors together, can block work continue on floor that has to removed excluding demolishing works tying floor from underside of slab and top of slab demolishing floor upon completion?

1 Answers