Structural glazing work procedure of glass fixing - types, precaution

1. STRUCTURAL GLAZING WORK PROCEDURE OF
GLASS FIXING - TYPES, PRECAUTION
What is structural glazing ?
Glazing Glass is fixed to doors and windows for
diffused lighting, for privacy and as a decorative feature of
the building. A varieties of glasses are available in the market.
of these, obscured glass and plain glass are used most often in
building construction.
In this chapter, we will discuss the types, quality and handling
of glazing glass. We will also study the quality of fixing
material, workmanship, precautions to be exercised and the
mode of measurement.

2. TYPES OF GLASS
There are four types of glasses which are widely used for
glazing work.
1. Obscured glass
2. Plain glass
3. Tinted glass
4. Wired glass
(1) OBSCURED GLASS
Pin head (Bajari), flora (tomato), chameli and pyramid are the
different varieties of obscured glass. Bajari is the most popular
and is commonly used for glazing. It is not transparent and
allows light ventilation as well as privacy. One side of this glass
is plain and
smooth. The other side is rough in texture like fine food grains
as "Bajari": giving it the name Bajari glass. It is available in
3mm, 4mm and 5mm thickness. The exact thickness of the glass
is mostly
unavailable, always being on the minus side, to an extent
(measured in mm). The glass sheets are available in the size
120cm x 180cm and 120cm x 210cm.

3. (2) PLAIN GLASS
Generally, plain glass is used for aluminium windows and M.S.
windows. It is available in thickness varying between 2mm to
19mm, like 2mm, 3mm, 4mm, 5mm, 5.5mm, 6mm, 8mm,
10mm, 12mm, 15mm and 19mm. It is completely transparent. A
variety of
plain glass is available. Both sides of the glass are plain and
smooth. It does not allow privacy, unless specially treated.
(3) TINTED GLASS
Tunted glass is most often used for aluminium rindows. It is
available in the same thicknesses as lain glass. Privacy may be
gained with this glass.
(4) WIRED GLASS
It is manufactured by rolling molten glass with a steel wire mesh
that is embedded in it. This glass is used in fire break doors and
in roof glazing because the wire mesh holds the broken glass
together and so minimizes danger of the glass breaking
into pieces.
GLAZING PUTTY (LAMBI)
Glass is fitted to the window with putty. It ensures that the glass
remains in position. Putty is made by mixing one part white lead

4. to three parts of finely powdered chalk. Boiled linseed oil is
added to this mixture to form a stiff paste of the
desired consistency. Readymade putty is available easily in the
market under brand names Brite, Shalimar, Kumb etc.
Following precautions should be taken while or using putty
for glass fixing-
Mix the putty at site with linseed oil and form a roll for better
consistency.
Ensure that the second coat of oil paint is a applied after the
putty is in a semi-dry condition.
Finishing of the putty should be made smooth with glass cut-
piece.
Ensure that a sufficient quantity of putty is applied to every
panel.
Before applying putty, ensure that glazing clips are fixed in
every hole provided in the frame.
Position and tension of each glazing clip should enable holding
the glass in position.
Ensure that glass size is not under cut.
Use a glass diamond cutter to cut the glass of the required size.
Do not disturb the glass panes when the putty is wet.

5. PROCEDURE OF GLASS FIXING (BAJARI PLAIN) TO
M.S. WINDOWS
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