MANISH S& RAGHU,

FACULTY,, DSCE

Chajja or Sunshades

By

Manish S & Raghu T,

Faculty, DSCE

CHAJJA OR SUNSHADES

MANISH S & RAGHU TFACULTY, DSCE

DEF’N & PURPOSE

component of building which is placed over the

opening to prevent adverse effect of weather

on a room

The purpose of chajja or sun shade is to

prevent direct entry of sun light into the room to

a certain extent

Also, it acts as a barrier to direct entry of rain

water into the room through the opening

It also adds on to the aesthetic appeal of a

building

MANISH S & RAGHU T,

FACULTY,DSCE

• Usually it is provided at a height of around 7 ft

from floor level

• If its made of concrete, it is casted along with

lintel monolithically

• An equal bearing of 9 inch-1ft has to be

provided on both the sides of opening

• It can be either cast-in-situ or precast

Types of chajja

• Based on material used r c c chajja

stone chajja

Tile chajja

Sheet chajja

Wooden chajja( not so popular these days)

FRP chajja & ferrocement chajja

R C C CHAJJA

• Reinforcement is provided in both directions

• This is casted along with lintel monolithically

• Thickness of min 50mm is a must

• Length of r c chajja will be equal to length of

lintel

• Top surface of chajja shall be compulsorily

water proofed

• At the junction of wall & chajja, a curved shaped

slope shall be provided

• Most popular type practiced in construction

Stone chajja

• 20 mm thick stone slabs( granite) can be used

• Stone slab > 20mm thick used for chajja shall

be plastered on both face

• Can be incorporated into wall during

construction as well after construction also( by

making an opening into the wall)

• These chajja are usually above the lintel

Tile chajja

• Consists of metal frame & tiles

• Initially, L shaped frame(primary

members) is fixed to the wall, these are

connected in between by secondary

members

• Space in between the secondary

members are covered with tiles

• Aesthetically these are better

MANISH S, FACULTY,

CTM DEPT, DSCE

Tile chajja

MANISH S, FACULTY,

CTM DEPT, DSCE

Sheet

chajja

MANISH S, FACULTY,

CTM DEPT, DSCE

Frp chajja developed

by CPWD research

MANISH S, FACULTY,

CTM DEPT, DSCE

MANISH S, FACULTY,

CTM DEPT, DSCE

MANISH S, FACULTY,

CTM DEPT, DSCE

MANISH S, FACULTY,

CTM DEPT, DSCE