How it's made
These are two or more lites of glass spaced apart and hermetically sealed to form a single unit with an air or gas filled space between each lite
IGU (Insulating glass unit)
In laminated glass, this is the gas pocket in the interlayer material or between the glass and the interlayer.
Bubbles
This is the scattering or dispersing as a tendency to eliminate a direct beam of light
Diffusing
This general term describes float glass, sheet glass, plate glass and rolled glass
Flat Glass
This is the dimension by which the framing system overlaps the edge of the glazing infill
Bite
In the manufacturing of float glass, this process of controlled cooling is done in a lehr to prevent residual stresses in the glass
ANNEALING
This is the profusion of bubbles in a coating film that form during the heat treating process and remain after the film solidifies
Blisters
This is the optical effect in flat glass due to irregularities in surface of glass that make objects viewed various angles appear?
Wave
This glass is formed on a bath of molten tin
Float Glass
This is the process of edge finishing flat glass to a beveled angle
Beveling
This process involves altering the surface of glass with hydrofluoric acid or other caustic agents
ETCH(ING)
This is a lightly pitted area on glass resulting in a dull gray appearance
Crush
This alteration of viewed images is caused by variations in glass flatness or inhomogeneous portions with the glass, and is an inherent characteristic of heat-treated glass
Distortion
This glass includes two or more lites, permanently bonded together with one or more polymer interlayers
Laminated Glass
This quotient is calculated as the long side of a glazing lite over the short side
Aspect Ratio
This glass is two times as strong as annealed glass and has been heat treated
Heat Strengthened Glass
This is a curve, bend, or other deviation from flatness in glass
Bow and Wrap
This tinted and/or coated glass reduces the amount of solar heat gain transmitted through a glazed product
Solar Control Glass
This glass has a transparent metallic or metallic oxide coating applied onto or into a surface, which reflects long-wave infrared energy, improving the U-value
Low-Emissivity (Low-E)
Other than unit skylights, this glass and framing assembly is sloped more than 15° from vertical and forms essentially the entire roof of the structure
Sloped Glazing
This is a vessel that employs high pressure and heat
Autoclave
These are small, surface indentations near and parallel to one edge of vertically tempered or vertically heat-strengthened glass resulting from tongs used to suspend glass during heat treating process
Tong Marks
This waviness is imparted to horizontal heat-treated glass while it is transported through the furnace on a roller conveyor, producing a distortion when glass is viewed in reflection
Roller Distortion
Sometimes called “toughened glass” outside of North America, this flat or bent glass has been heat-treated to a high surface and/or edge compression to meet the requirements of ASTMC 1048
Fully Tempered Glass
This ratio of solar heat gain through a window, under a specific set of conditions, to the solar heat gain through a 3mm sheet of clear, double-strength glass under the same conditions, includes the directly transmitted solar radiation, as well as the solar energy absorbed and then redirected to the indoor space
Shading Coefficient