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Column Footing

Columns and footing

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Shaikh Mohsin
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0% found this document useful (0 votes)
304 views1 page

Column Footing

Columns and footing

Uploaded by

Shaikh Mohsin
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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NOTES:

1. Basic reference code:- IS 456: 2000


'd' 2. Material used - Concrete M-20 and Steel - Fe 500
LAP LENGTH 3. Min. Deshuttering time as per....
'd' PLINTH BEAM
MIN. 50 D LAPS Clause No. 11.3 of IS 456: 2000 as follows.
C 13 C 14 PLINTH BEAM SHOULD NOT BE
WITH IN BEAM

SPACING OF LATERAL TIES


C 12 Sr.No. Type of Formwork Min. Period before
COL. JUNCTION. striking formwork

AT HALF SPACING
FLOOR LEVEL 1. Vertical Formworks to columns,walls,Beams. 16 to 24 Hrs

C 11

EXCAVATION UP TO HARD STRATA


Soffit formworks to slabs
C 10

EXCAVATION UP TO HARD STRATA


2. (Props to be refixed immediately after 3 Days
GROUND LEVEL
GROUND LEVEL
removal of formworks)

splice 200
3-16 MM DIA Soffit formworks to Beams
3.

TRANSVERSE REINFORCEMENT
7 Days

h/4
(Props to be refixed immediately after
C9

SPECIAL CONFINING REINFORCEMENT

h/3
C8 removal of formworks)

'D'

'd'
C7 2-12MM DIA

'D'

'd'
350MM

(LINKS @ 1/2 SPACING UP TO FIRST FLOOR)


100 MM
THICK
Props to Slabs:
P.C.C 100mm 4. 1) Spaning upto 4.5 m 7 Days

AS PER 7-3-3
2) Spaning over 4.5 m 14 Days

600 mm
100 MM THICK P.C.C
600 mm

C6

AS PER 7-4-1
C5 Props to beams and Arches:
5. 14 Days
C4 1) Spaning upto 6 m
2) Spaning over 6 m 21 Days
CONCENTRIC FOOTING SECTION " C1 " CONCENTRIC FOOTING SECTION " C5 "

h
4. Nominal covers Clear Cover
I Footings 50
II Columns & walls >200mm width 40
(to links of column)
C2 C1 C 1,3,4,6,7,9,10,12,13,14 III Columns & walls with width of 200mm & below 40
C3 beam in footing having reinf. of dia. 16mm & above.
C1 (to links of column)
TOP 3-16mm

h/3
BOTTOM 2-12mm IV Columns & walls with width of 200mm & below 30

h4
having reinf. of dia. 12mm.
RING 6MM 200MMC/C (to links of column)
V Slabs 30
FLOOR LEVEL VI Beams 30
(to stirrups of beam)
FOOTING BEAM DETAILS
VII Lift walls 40

5. Beams with depth more than 750mm, provide side-face reinforcement

lo
TYPICAL PLAN OF FOOTING 6. Minimum clear spacing between any two longitudinal bars in beam= 50mm.
7. All laps (Ld) shall be staggered & not more than 50% bars to be lapped
at any given section.
S C H E D U L E O F C O L U M N & F O O T I N G TYPICAL C/S OF COLUMN Development Length(Ld) for Columns 40 x Dia of bar
For Beams and slab it shall be 50 x Dia of bar.
COLUMN 8. If footings overlap with each other, necessary revision shall be obtained from Engineer.
R.C.C.FOOTING REINFORCEMENT REINFORCEMENT UP TO
COLUMN 1ST SLAB 9. Design is valid for number of floors as indicated in the drawing + 1 Additional Floor
SR.NO. COLUMN NO. P.C.C.SIZE THICKNESS REMARKS REMARKS
SIZE
SIZE THICKNESS SHORT LONG MAIN STEEL STIRRUPS
10. For cantilevers, top bars to be anchored behind from external face of support for - Ld or
span of cantilever- whichever is greater
10mmØ @ 10mmØ @ Eccentric-box with Footing 06mm Ø 11. Supervision and quality control is not our responsibility.
1 C 1,3,6,9,12,14 1450 X 1450 100 1350 X 1350 425
150MMC/C 150MMC/C Beam
230 X 460 12mm Ø 8 nos.
@150 c/c 12. The structural engineer has no liability of the part of the work which
ALT. DOUBLE RING

16mm Ø 4 nos.
is not designed, nor checked by him before casting.
10mmØ @ 10mmØ @ 06mm Ø
2 C 4,5,7,8 1500 X 1450 100 1400 X 1350 450 Isolated -box 230 X 460 + 12mm Ø 4 @150 c/c
13. Do not add or alter the R.C.C. Design.
150MMC/C 150MMC/C
nos.+ ALT. DOUBLE RING
14. Formwork / Centering / shuttering / deshuttering is the
10mmØ @ 10mmØ @ Eccentric-box with Footing 06mm Ø responsibility of the contractor.
3 C2 1450 X 1450 100 1350 X 1350 425
Beam
230 X 460 12mm Ø 8 nos.
@150 c/c
150MMC/C 150MMC/C
ALT. DOUBLE RING
15. Reinforcement should be free from rust and oil.
16. Structural joints should be monolithic. Use "Vibrator" for casting.
10mmØ @ 10mmØ @ Eccentric-box with Footing 06mm Ø
4 C 10,13 1450 X 1350 100 1350 X 1250 425
150MMC/C 150MMC/C Beam
230 X 380 12mm Ø 8 nos.
@150 c/c 17. Material testing shall be done as per norms.
ALT. DOUBLE RING
TYPICAL STIRRUP Any deviation shall be informed immediately.
10mmØ @ 10mmØ @ 06mm Ø 18. Under no circumstances concreting be done unless the reinforcement
5 C 11 1450 X 1350 100 1350 X 1250 425
150MMC/C 150MMC/C
Isolated -box 230 X 380 12mm Ø 8 nos.
@150 c/c is checked, approved and certified by the Engineer in Charge.
ALT. DOUBLE RING

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