Bar bending Schedule

CE 402

Bar Bending Schedule BarBar-be bend ndin ingg-sc sche hedu dule le is the the sche schedu dule le of  reinfo reinforc rcemen ementt bars bars prepar prepared ed in advanc advance e before cutting and bending of rebars. This schedule contains all details of size, shape and dimension of rebars to be cut.

BEND AND HOOKS

Bend: In general provided for CTD or TOR steel B= Depends upon k value and B≥ 75mm k – depends upon Type of steel used in reinforcement

Hook: In general provided for Mild Steel H= Depends upon k value and H≥ 75mm k – depends upon Type of steel used in reinforcement

Value of k,B and H Type of Bar (For Bar dia <25mm)

k

H

B

Ordinary M.S (140N/mm2)

2

9Ø

5Ø

Medium Tensile steel (190N/mm 2)

3

11Ø

5.5Ø

CTD bars or TOR steel or HYSD bar

4

13Ø

6Ø

Type of Bar (For Bar dia >25mm)

k

H

B

Ordinary M.S (140N/mm2)

3

11Ø

5.5Ø

Medium Tensile steel (190N/mm 2)

4

13Ø

6Ø

CTD bars or TOR steel

6

17Ø

7Ø

Ø= Diameter of reinforcement bar

Stirrup length

Door Lintel Bar bending Schedule Q1. A R.C.C lintel is provided over a door. The Door size is 1.10m by 2.50m. The lintel is 200mm x 150mm in cross section as shown below. Work out in detail the quantity of  reinforcement required for the lintel. Consider bearing of the lintel on either side as 150mm.

Type of  Sl.No bar and . mark

Shape

Dia

No.

Length in m

Weight per  Weight unit length in Kg in Kg

SS beam Q2. A rectangular beam 200mmx300mm has overall length of 3m. The beam is reinforced with 3no.s 16Ø, TOR steel with two outer bar straight and L-hooked at ends and the inner bar bent up at 45 o at appropriate places with L-hooked at ends. At top, two outer hanger bars are 10Ø TOR steel straight and Lhooked at ends. Stirrups are 6Ø MS bar and spaced at 200mm c/c. All concrete cover is 25 mm. Take the bearing support as 300 mm at either end of the beam (1) Draw sketches showing arrangements of reinforcement for the beam. (2) Prepare BBS for four such beams.

 Q  u  e  s   t    i    o  n  3 

 Q  u  e  s   t    i    o  n  4 

Estimate of RCC Roof Slab  Q  u  e  s   t    i    o  n  5 

Prepare detailed estimate of a RCC roof slab of 3m span and 6m long. It rests on wall and have 150mm bearing with it. Main reinforcement consists of 12mm diameter Mild Steel with alternate bar bent up near support at a distance of  500mm from the support. The spacing of the main reinforcement is 120mm c/c. Distribution bar consists of 6mm diameter with spacing 180mm c/c. Assume side cover as 40mm and bottom cover as 20mm.

RCC column with Isolated Footing