presentation on slab, beam & column
DESCRIPTION
This is a Power Point Presentation discussing briefly about the Slab, Beam & Column of a building construction. It was presented on 6th March, 2014 as part of the Presentations of the subject: DETAILS OF CONSTRUCTION, at Ahsanullah University of Science & Technology (AUST)TRANSCRIPT
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PRESENTATIONON
BEAM , SLAB , COLUMN
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Presented By : Group-05 Year : 2nd, Sem : 2nd
Name of the Group Members :
MOHAMMED NASIL AFTAD – 12-01-03-141 MD. MOHIBUL HASAN – 12-01-03-112 SAFFAT RABBY MUNAYEM – 12-01-03-106 MD. MUSABBIR AHMED – 12-01-03-156 MD. MYNUL KARIM – 12-01-03-126 MAKSUDUR RAHMAN – 12-01-03-146 BISWAJITH DEB RAHUL – 12-01-03-120 SHARMIN SIDDIKA – 12-01-03-131 AFSANA KHAN – 12-01-03-151 S.M. TOWFIQ ISLAM – 11-02-03-047
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Column is a vertical structural member
It transmits the load from ceiling/roof slab and beam, including its self-weight to the foundation.
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Long
Column/
Slender
Short
Column
Intermediate
Column
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Horizontal member of a structure
Carries transverse loads
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SIMPLY SUPPORTED
BEAMOVERHANGING BEAM CANTILEVER BEAM
FIXED BEAM PROPPEDCONTINUOUS
BEAM
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It is a flat horizontal surface
It is supported by beam and column
It transfers load to the beam
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GRANAIT
MARBEL
•*ONE WAY * TWO WAY * FLAT * BEAM
*RIBBED
CONCRETE
WOODEN
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SLAB
BEAM
COLUMN
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1. U.D.C. CONSTRUCTION
TEJGAON INDUSTRIAL AREA, DHAKA
2. RANGS BABYLONIA
TEJGAON INDUSTRIAL AREA, DHAKA
3. RESIDENTIAL AREA
BASUNDHARA RESIDENTIAL AREA , DHAKA
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Sand
Cement
Reinforcement
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Vibrator
Cutter
Mixing Machine
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A rectangular column must have at least 4 reinforcements at 4 corners
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Circular column should have minimum 6 reinforcements
Reinforcement should be min 1% and max 8%
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It is done when length of reinforcement bar is small but we need longer reinforcement
Provided in mid span
Tied with hooks
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Columns have closed lateral ties spaced approximately uniformly across the column
Resist shear force and bursting out effect
10mm Ø, 12mm Ø bars are used
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Normal spacing = S in mid span
Spacing near support joint = S/2
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Used to resist expansion
The hooks shall be bent to 135º
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Must be leak proof, smooth inside and properly aligned
Should be maintained 1.5 in clear cover
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Concrete is casted in two lifts
It should not be casted from more than 5 feet high to avoid concrete segregation
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Compaction is done by vibrator
Construction joints are provided for better bonding between new and old concrete
Formwork is removed after 3 days
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Provides water for hydration reaction
Increases the strength up to 2.5 times
Done for 21 days
Gunny bags are used for curing
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STEEL FORMWORK WOODEN FORMWORK
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A min. of 0.2% bar is to be provided for the compression in order to take care of the deflection
Extra tops are used in the support joints
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Used to resist shear and diagonal tension stresses in a beam
Shall be minimum size of 8mm ∅ in case of lateral load resistance
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Alternate hook is provided
The hooks shall be bent to 135º
Stirrup distribution is dense near support
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Casting and Curing are done simultaneously for beam and slab.
Casting of lower part is done earlier
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Side of formwork is removed after 3 days
Bottom part is removed after 21-28 days
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Steel Formwork Wooden Formwork
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BRACING
PROPS
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Slab reinforcement includes straight bar , cranked bar
Extra tops near the supports
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Mainly 1.5 " clear cover is maintained
CC blocks are used
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Compaction is done with Patta
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Curing : It is done for 21 days
Removal of Formwork: After 21 days formwork is removed
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