presentation on slab, beam & column
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WE
WELCOME
PRESENTATIONONBEAM , SLAB , COLUMN
1
Course Information
Course Name :
Details Of Construction
Course No : CE 200
COURSE TEACHER :
URMI DEVI WAHID HASAN
Presented By : Group-05 Year : 2nd, Sem : 2nd
Name of the Group Members :
MOHAMMED NASIL AFTAD 12-01-03-141MD. MOHIBUL HASAN 12-01-03-112SAFFAT RABBY MUNAYEM 12-01-03-106MD. MUSABBIR AHMED 12-01-03-156MD. MYNUL KARIM 12-01-03-126MAKSUDUR RAHMAN 12-01-03-146BISWAJITH DEB RAHUL 12-01-03-120SHARMIN SIDDIKA 12-01-03-131AFSANA KHAN 12-01-03-151S.M. TOWFIQ ISLAM 11-02-03-047 Group Information
Column is a vertical structural member
It transmits the load from ceiling/roof slab and beam, including its self-weight to the foundation.
Column
Classification Of Column
Horizontal member of a structure
Carries transverse loads
Beam
Classification of Beam
It is a flat horizontal surface
It is supported by beam and column
It transfers load to the beam
Slab
Classification of Slab
Load Transform
1. U.D.C. CONSTRUCTION TEJGAON INDUSTRIAL AREA, DHAKA2. RANGS BABYLONIA TEJGAON INDUSTRIAL AREA, DHAKA3. RESIDENTIAL AREA BASUNDHARA RESIDENTIAL AREA , DHAKA
Visited Sites
Materials
Machines
Construction of a Column
A rectangular column must have at least 4 reinforcements at 4 corners
Vertical Reinforcement
Circular column should have minimum 6 reinforcements
Reinforcement should be min 1% and max 8%
Circular Column in Reinforcement
It is done when length of reinforcement bar is small but we need longer reinforcement
Provided in mid span
Tied with hooks
Over Lapping of Rods
Columns have closed lateral ties spaced approximately uniformly across the column
Resist shear force and bursting out effect
10mm , 12mm bars are used
Ties
Normal spacing = S in mid span
Spacing near support joint = S/2
Placement of Ties
Used to resist expansion
The hooks shall be bent to 135Hooks
13545
Must be leak proof, smooth inside and properly aligned
Should be maintained 1.5 in clear cover
Formwork
Concrete is casted in two lifts
It should not be casted from more than 5 feet high to avoid concrete segregation
Casting in Column
Compaction is done by vibrator
Construction joints are provided for better bonding between new and old concrete
Formwork is removed after 3 days
Compaction and Removal of Formwork
Provides water for hydration reaction
Increases the strength up to 2.5 times
Done for 21 days
Gunny bags are used for curing
Curing
Construction of a Beam
Types of FormworksSTEEL FORMWORKWOODEN 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
Reinforcement in Beam
Used to resist shear and diagonal tension stresses in a beam
Shall be minimum size of 8mm in case of lateral load resistance
Stirrup
Alternate hook is provided
The hooks shall be bent to 135Stirrup distribution is dense near support
Hooks
Casting and Curing are done simultaneously for beam and slab.
Casting of lower part is done earlier
Casting and Curing
Side of formwork is removed after 3 days
Bottom part is removed after 21-28 days
Removal of Formwork
Construction of a Slab
Types of FormworksSteel FormworkWooden Formwork
Props
BRACINGPROPS
Slab reinforcement includes straight bar , cranked bar
Extra tops near the supports
Reinforcement in Slab
Mainly 1.5 " clear cover is maintained
CC blocks are used
Clear Cover
Compaction is done with PattaCasting and Compaction
Curing : It is done for 21 days
Removal of Formwork: After 21 days formwork is removed
Curing and Removal of Formwork
The Complete Process
GROUP MEMBERS AT THE SITE
THANK YOU
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