Construction

What is Glass Window

For comfort and well-being of inmates of the building, it is essential to ventilate the room by allowing a natural change of air between inside and outside.  For this purpose to provide day light and ventilation, windows and ventilators are provide in the wall of the rooms. Window has two parts one is frame and other is shutter. According to requirement windows shutter may be paneled, glazed, partly glazed and wire gazed. Glass or glazed windows are chosen for better day light and affording a view of the outside.

Glass window full hight for dining area

Right Glass for window


Sheet glass pan used in glass paneling of door, window and ventilator shutters shall be flat, transparent and clear as seen by the unaided eye. It shall be free from specks, bubbles, distortion and flaws of every kind. Ordinary quality glass confirming to IS: 2835-1977 is generally used. Due to superior optical clarity of float glass, it is now generally preferred for glazing in windows.

Parameter for Thickness of Glass

The thickness of glass is required according to the size of glass pan to be fixing in the window as detail given below:

 S.No:  Size of Glass pan
 Thickness of Glass Pan
 Weight of Glass pan
 1  Glass pan-exceeding 1sqfeet
 Or 900 sq cm
 2mm  5.49 Kg/Sqm.
 2  Glass pan exceeding 1sqfeet
 Up to 4sqfeet or 900sq cm to 3700 cm
 2.54mm  6.40 Kg/Sqm.
 3  Glass pan-exceeding 4sqfeet
 Up to 6sqfeet or 3700sq cm to
 5500 sq cm

 3mm  7.93 Kg/Sqm.
 4  Glass pan-exceeding 6sqfeet
 Up to 9sqfeet or 5500sq cm to
 8400 sq cm
 4mm  9.76 Kg./Sqm.
 5  Glass pan-exceeding 9sqfeet
 Or 8400 sq cm  
 Plate Glass
 
Precautions while installing glass in window frames
  • Before fixing glass, all opening parts shall be check to see that they are closing correctly and are well bedded and not twisted in any way.
  • The weight of the glass in case of side hung shutter causes it to drop slightly on its hinges.
  • Therefore, before fixing glass, the shutter shall be set in a slightly high position in frame.
  • Glazing (glass) shall be providing on the outside of frame.
  • The glass pan should have square corners and straight edges.
  • The glass pans are so cut that they fit slightly loose in the frames.
  • The glass is accurately cut 5 mm less in length and width, so that there is a clearance of 2.5 mm between the edges of the glass all round with window shutter. This clearance is to allow for variation in the shutter and in the glass.
  • Use frosted glass pans in door, windows of toilets.
  • In case of newly galvanized window, a thin film of linseed oil may be applied to rebate of frame for better grip of putty to the frame.
  • The glass putty most commonly used should conform to IS;419-1967 and Polysulphied based sealants should conform to IS; 11433 PART 1-1985 and IS;12118-1987.
  • In case of iron glass window, glazing clips should be used at least 4 nos for size30cmx60 cm for larger size use 6 glazing clips.
  • Apply paint on putty, which helps to prevent cracks in putty.

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