bar bending schedule(by akhil)
DESCRIPTION
Bar Bending Schedule (BBS) is a chart which gives a clear picture of bar length, diameter of bar ,bar mark ,location of bar. It allow workers to place steel properly.TRANSCRIPT
Bar Bending Schedule
By Akhil Lamdade
CONTENT Introduction B B S for different reinforced concrete structures Measurement of bending dimensions Do’s and Don'ts Typical bar bending schedule Codes , specifications and standards
Bar Bending Schedule Member identification Bar mark Type of steel Diameter of bar Length of each bar Number of members Number of bars in each member Total number of bars Total length Shape code Bending dimensions
BBS for RC Beams
BBS for RC Slabs
BBS for Columns and walls
Measurement of bending dimensions
Bent-up Bar
h45o
h
h2
Additional Length = 0.414 hTotal Length = L + 0.414 h
L
Do’s and Don’tsProper accuracyProvide cover to reinLocation of holes
Bars >36mm shall not bundled
Welding is not permitted at bends
Typical BBS CalculationExample: Prepare bar bending schedule for the given beam. Clear cover = 40 mm
2-#20 +1-#15
4000
570 2-#20
2-#10
228
#10 @ 180 c/c
Longitudinal Section
1-# 15
Bar Bending Schedule (contd…)Example: Prepare bar bending schedule for the given beam. Clear cover = 40 mm
#10 @ 180 c/c
228
375
2-#10
1-# 15
2-#20
(M-2)
(M-1)
(S-1)
(H-1)
Cross Section
Bar Bending Schedule (contd…)Example:
M-1M-1 = 4000 + 2 x 228 – 2 x 40 + 2 x (18 x 20) = 5096
M-2h = 375 – 2 x 40 – 2 x 10 – 2 (15/2) = 260 h
M-2 = 4000 + 2 x 228 – 2 x 40 + (0.414 x 260) x 2 = 5091
H-1H-1 = 4000 + 2 x 228 – 2 x 40 = 4376
Bar Bending Schedule (contd…)Example: Prepare bar bending schedule for the given beam. Clear cover = 40 mm
Number of Bars = 4000 / 180 +1 = 24 Round-up
Shear stirrups
a
a = 375 – 2 x 40 – 10 = 285 mm
bb = 228– 2 x 40 – 10 =138 mm
Total length of S-1 = 2 (138 + 285 + 18 x 10) = 1206 mm
Bar Bending Schedule
Serial #
Bar Designatio
nNumber of Bars
Length of one
Bar(m)
Dia of
bar
Weight of Steel Bars Shape of Bar
#10 #15 #20
1 M-1 2 5.096 20 24
2 M-2 1 4.591 15 7.2
3 H-1 2 4.376 10 6.9
4 S-1 24 1.206 10 22.7
1.05 Σ
31.1 7.6 25.
2Total Weight = 64 kg
4376
4376
4376
285138
CODES , SPECIFICATIONS & STANDARDS IS:2502-1963 IS:1893-2000 SP:34 IS:456 International standard
ISO:4066-1977
some websites which are proving Bar Bending Schedule Software.
1. www.eigen-tech.com/cs.html 2. www.rgsrebar.com/rebar.aspx 3. www.ensoftindia.com/
prod_barbeque.htm 4. www.steelpac.co.uk/design/
steelpac_rdm... 5. www.cadsglobal.com 6. www.supercivilcd.com 7. www.technocad.co.za 8. www.BendingSchedule.com 9. www.structural-engineering.fsnet.
co.uk...
10. www.continuousbeamanalysis.com
Queries ?
Thank you
Good day