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