GlassCatalogue_LowRes

Glossary Of Terms / S-T
Stratified glass
A glass product consisting of two or more sheets of glass bonded together by an interlayer
of either polyvinyl butyral (PVB) or ethylene vinyl acetate (EVA) film for use in a variety of
safety and security applications. See Laminated Glass.
Stress
Force per unit area, usually expressed in pounds per square inch.
Stress (residual)
Any condition of tension or compression existing within the glass. Caused by incomplete
annealing or induced temperature gradient during the manufacture of heat treated glass.
Structural glazing
Glazing system used in place of a conventional joinery or curtain wall. The glass is installed
on to structurally supporting sub-frame or glass fin. The glass is retained by the insertion of
mechanical fixings or fittings.
Structural silicone glazing
The use of a silicone sealant for the structural transfer of loads from the glass to its
perimeter support system and retention of the glass in the opening.
Substance
Refers to the thickness of glass expressed in mm.
Substrate
A base material to which other materials are applied. The surface to which a sealant or
adhesive is bonded.
Surface compression
The compressive stresses present in the surface of glass. This is balanced by the centre of
the glass being in tensile stress.
Surface position (#)
Generally a number denoting which face of a pane of glass or insulating glass unit the
coating side or patterned side should face. Sometimes abbreviated to #1, #2, #3 or #4. #1
is the surface to the outside of the building. Can also apply to laminated glass.
Sweat
Condensation that forms when warm moist air meets cold glass or metal.
Tangent
A straight line extending from the arc of a curve or bend.
Temper (toughen)
To heat glass past its softening point and chill rapidly. This results in a surface compressive
stress which gives it increased strength. When the glass breaks small fragments of glass
are the result. See toughened glass.
Template
An exact size physical model of the shape of the glass to be made.
250 Product Catalogue For Glass Processors & IG Manufacturers