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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)
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PRESENTATIONON
BEAM , SLAB , COLUMN
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
Column is a vertical structural member
It transmits the load from ceiling/roof slab and beam, including its self-weight to the foundation.
Long
Column/
Slender
Short
Column
Intermediate
Column
Horizontal member of a structure
Carries transverse loads
SIMPLY SUPPORTED
BEAMOVERHANGING BEAM CANTILEVER BEAM
FIXED BEAM PROPPEDCONTINUOUS
BEAM
It is a flat horizontal surface
It is supported by beam and column
It transfers load to the beam
GRANAIT
MARBEL
•*ONE WAY * TWO WAY * FLAT * BEAM
*RIBBED
CONCRETE
WOODEN
SLAB
BEAM
COLUMN
1. U.D.C. CONSTRUCTION
TEJGAON INDUSTRIAL AREA, DHAKA
2. RANGS BABYLONIA
TEJGAON INDUSTRIAL AREA, DHAKA
3. RESIDENTIAL AREA
BASUNDHARA RESIDENTIAL AREA , DHAKA
Sand
Cement
Reinforcement
Vibrator
Cutter
Mixing Machine
A rectangular column must have at least 4 reinforcements at 4 corners
Circular column should have minimum 6 reinforcements
Reinforcement should be min 1% and max 8%
It is done when length of reinforcement bar is small but we need longer reinforcement
Provided in mid span
Tied with hooks
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
Normal spacing = S in mid span
Spacing near support joint = S/2
Used to resist expansion
The hooks shall be bent to 135º
Must be leak proof, smooth inside and properly aligned
Should be maintained 1.5 in clear cover
Concrete is casted in two lifts
It should not be casted from more than 5 feet high to avoid concrete segregation
Compaction is done by vibrator
Construction joints are provided for better bonding between new and old concrete
Formwork is removed after 3 days
Provides water for hydration reaction
Increases the strength up to 2.5 times
Done for 21 days
Gunny bags are used for curing
STEEL FORMWORK WOODEN FORMWORK
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
Used to resist shear and diagonal tension stresses in a beam
Shall be minimum size of 8mm ∅ in case of lateral load resistance
Alternate hook is provided
The hooks shall be bent to 135º
Stirrup distribution is dense near support
Casting and Curing are done simultaneously for beam and slab.
Casting of lower part is done earlier
Side of formwork is removed after 3 days
Bottom part is removed after 21-28 days
Steel Formwork Wooden Formwork
BRACING
PROPS
Slab reinforcement includes straight bar , cranked bar
Extra tops near the supports
Mainly 1.5 " clear cover is maintained
CC blocks are used
Compaction is done with Patta
Curing : It is done for 21 days
Removal of Formwork: After 21 days formwork is removed
