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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

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