3. BRIEF SPECIFICATIONS OF
SAFETY GRILLS FOR WINDOWS
Providing oil painted 10mm thick M.S safety grill
for a window frame of size 1828*1828 mm by
drilling holes into walls.
4. DETAILED SPECIFICATION FOR
SAFETY GRILLS FOR WINDOWS
1. Measuring window frame
2. Fabricating the frame
2.1 Welding
2.2 Oil Painting
3. Drilling
4. Installing Safety Grills
5. 1. Measuring Window Frame- Measurement of
window frame is done using metal tape (30 m),
usually rough surface are avoided to reduce
variations in measurements
2. Fabricating The Frame:- Fabricating the frame
comprise of two steps
2.1. Welding Procedure – A Specified
course of action, to be followed in
welding, including a list of materials
and tools to be used.
6. 2.1.1 Arc Welding
a) Classification and size of Electrodes,
b) Current and open- circuit Voltage,
c) Length of run per electrode, or speed of travel,
d) Number and arrangement of runs in multi- run
welds,
e) Position of Welding,
f) Preparation and set-up of parts,
g) Welding sequence, and
h) Pre or Post heating.
7. 2.1.2 Welding Roads – Filler Metal, in wire or rod
form, used in gas welding and brazing processes,
and those arc welding processes wherein the
electrode does not furnish the filler metal.
2.1.3 Welding Sequence- The Order and/or
direction in which either welds or runs are made.
2.1.4 Welding Technique- The Manner in which
an operator manipulates an electrode, a blowpipe
or the like.
8. 2.2 Oil Painting: - A Specified course of action, to
be followed in Oil Painting, including a list of
materials and tools to be used.
a) Polishing With Rough paper (60 grit) to
remove dust particles,
b) Treatment with anti-rust solution (Asian Paints
Epoxy Primer) to protect against corrosion
c) Final Coat – Once the anti-rust solutions
completely dries, the grills are painted with oil
paint(Asian Paint Oil Paint)
9. 3) Drilling : -A Specified course of action, to be
followed in Drilling, including a list of materials and
tools to be used.
a) DO MARKINGS -Masonry Drills are used with
hammer action power drill,
b) A slow rotational speed for drilling into harder
materials to avoid overheating the tip,
c) Frequently withdraw the bit to remove dust,
d) Long Masonry Bits( 300 – 400 mm) and sizes
ranging from 4 – 16 mm are used,
e) Use a drill sharpener or grindstone to sharpen the
tungsten carbide tip.
10. 4. Installation: -A Specified course of action, to
be followed in Installation, including a list of
materials and tools to be used.
a) Fix The Frame
b) Tighten the Screw
c) Ready to use
11. Rate Analysis Assumption
• Window Size – 6 Ft* 6 Ft (1828 * 1828 mm)
• M.S. Strip (2.54* 4 mm)
• No of Horizontal Bars =12 (10mm Dia)
• No of Vertical bars = 12 (10mm Dia)
• Horizontal Spacing = 150mm c/c
• Vertical Spacing = 150 mm c/c
• Oil painting with Anti Rust Treatment on M.S
bars and Strip
