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Safety Glass
Glass which must have passed an impact test and either must not break or must break safely.
Safety Glass
Glass which does not disintegrate into sharp and potentially dangerous splinters when it is broken. Safety glass may be produced by laminating (see “laminated glass”) or by tempering (see "tempering").
Sand-blasted glass
This type of glass is produced by spraying sand at high velocities over the surface of the glass.
Sandblasting
A method for giving glass surfaces a matt finish either for decoration or to reduce transparency. Compressed air forces the abrasive material through the nozzle of a sandblasting gun and onto the glass surface. The glass is normally placed inside a special cabinet with arm holes, a viewing window and dust extraction facilities.
Sandblasting
A special glass treatment in which sand is sprayed at high velocities over the surface of the glass.
Screen printed glass
Screen printed glass is tempered or heat-strengthened glass, one face of which is covered, either partially or totally, with mineral pigments.
Sealant
A flexible material for sealing.
Sealed Double Glazed Unit
A combination consisting of two glass panes enclosing a hermetically-sealed air space.
Sealer
A substance applied to glass and frame surfaces that guarantees consistent adhesion.
Secondary seal
A sealant applied to the edges of double-glazed units after the primary seal, to provide effective and durable adhesion between the glass components and spacer bar.
Self cleaning glass
This type of glass is covered by a special coating which literally cleans itself.
Sheet Glass
A life of glass
Sight size
The actual size of the opening that admits daylight.
Silicone
A polymeric organic compound offering excellent resistance to cold, heat and water.
Silicone
used principally as adhesives and setting materials, particularly where plasticity or water-repellent characteristics are required.
Silvering
is the chemical process of coating glass with a reflective substance to create a mirror. When this substance is applied to the glass a chemical reaction takes places, bonding the silver to the glass. The mirror is dried and coated with a special back paint.
Single glazing
Window or door with a single glass lite.
Single-strength glass
A term used to describe glass with a defined thickness (2.16-2.57 mm).
Snow load
An imposed load exerted onto a structure by formation of snow.
Space bar
Generally an aluminum bar along all edges of a double-glazed unit, filled with desiccant, which separates the two panes of glass and creates a cavity.
Spacer
A metal bar or strip, generally of aluminum, which is bent into a frame to separate the two panes of glass in an insulating glass (I.G.) unit.
Spall
Small fragments of glass that are ejected from the surface of a laminated glass sheet when the opposite surface is impacted.
Sputtering
Is a method better known as “vacuuming” to apply coating on the glass.
Structural sealant glazing
An external glazing system where the glass is bonded to a carrier frame without mechanical means.
Surface Coatings
A thin layer or covering which changes the basic composition of glass.
Storefront Door
Glass door made to accommodate heavy ingress and egress from store
Spandrel Glass
Heat-treated float glass with a colored-ceramic coating adhered to the back by a heat-fusing process or with a colored water-based silicone coating. It is used as a fixed opaque colored glass on buildings in front of floor slabs and columns. Spandrel glass is available in a wide array of colors, but should be evaluated for thermal stress to determine the level of heat treatment needed.
Shading coefficient (SC)
The solar factor of a glass relative to that of 3mm clear float glass (0,87) and is used as a performance comparison. The lower the shading coefficient number, the lower the amount of solar heat transmitted.
Shading Coefficient (S.C.)
The ratio of the solar heat gain through the examined glass unit to that which is transmitted through a single lite of 1/8"-thick clear glass. The S.C. of 1/8"-thick clear glass has a given value of 1.0.
Sloped Glazing
A glass installation at a slope of 15 degrees or more from the vertical. It is often subject to greater solar energy exposure and is more susceptible to impact from falling objects, windborne debris, and snow loads than vertical glazing, requiring the use of heat-treated & laminated glass.
Solar Energy Transmittance
The percentage of solar energy (ultraviolet, visible light, and near-infrared), from 300 to 2,100 nanometers within the solar spectrum, transmitted through the glass.
STC (Sound Transmission Class)
A rating of the ability of a building partition to attenuate sound, measured by the amount of decibel noise reduction at different sound frequencies. The STCs for standard windows typically range from 18 to 38. The STC rating of a standard drywall, in comparison, is approximately 33. Lamination significantly improves glass STC; increased panel thickness can also enhance sound control.
Structural Silicone Glazing
A system where the glass is bonded to the framing members of a curtainwall using a structural silicone adhesive without the presence of exterior retainers or stops.