Solar heat that passes through a material and is captured by mechanical means.
Refers to the space between the two lites of glass in a IG unit. Air space is usually 1/32″ greater than spacer width.
A highly porous solid with the ability to concentrate and hold gasses and vapors in contact with the solid. This includes moisture, as well as many other organic and inorganic molecules.
The adhesion in an extremely thin layer of molecules (as of gases, solids, or liquids) to the surface of solid bodies or liquids with which they are in contact. Adsorption is the result of attractive forces that can be likened to tiny “magnetic” microelectric charges on the surface of the adsorbent and the adsorbed substance. Variables affecting capacity include polarity, temperature, molecular size, adsorbate concentration, and type of adsorbent.
An inert gas used to fill IG units as a replacement for air. Argon filled IG units have better thermal and sound insulating qualities then air filled units.
Bed or Bedding
The bead of compound applied between a lite of glass or a panel and the permanent stop or sight bar of the sash or frame, and usually the first bead of compound to be applied when setting glass or panes.
A Sealant/compound after application to a surface of the spacer.
Beveled or Cap Bead
Bead of compound applied so as to have a slanted top surface so water will drain away from the glass or panel.
The dimension by which the edge of a glass product is engaged into the glazing channel.
Rectangular, cured sections of neoprene or other approved material, used to position the glass product in the glazing channel.
Refers to any curve in the spacer. These could be up, down, or sideways curves.
Breather (Tube) Units
An insulating glass unit where a tube or a hole is factory placed into the unit’s spacer to accommodate elevation of pressure differences encountered in shipping. These tubes or holes are to be sealed on the jobsite prior to unit installation.
An abbreviation of British Thermal Units that defines the amount of heat needed to raise the temperature of one pound of water one degree Fahrenheit.
The installation of glass products where the vertical glass edges are without structural supporting mullions.
A sealant which is used to adhere the glass to the spacer in an IG unit.
Capillary Tube Units
An insulating glass unit where a very small metal tube of specific length and inside diameter is factory-placed into the unit’s spacer to accommodate both the pressure differences to the point of installation and also the pressure differences encountered daily after installation. Capillary tubes are not sealed after installation.
A type of building wall construction consisting of an outer wall fastened to an inner wall separated by an air space.
Certified IG Unit
An insulating glass unit constructed like a unit test model which has successfully passed the ASTM E773 and E774 tests of insulating glass seal durability performance at specific levels.
The installation and sealing of glass products into U-shaped glazing channels employing removable stops. Usually associated with a sealant, it is a measure of the structural strength of the sealant material (tensile strength).
The splitting and opening of a sealant/compound within its body, resulting in structural damage and/or water penetration.
The visible formation of moisture on the inside (room side) surface of a IG unit.
The transfer of heat through matter, whether solid, liquid, or gas.
A transfer of heat through a liquid or gas when that medium hits against a solid surface.
(As applied to a folded INTERCEPT spacer) is an increase in spacer width at the corner bend point; caused by the corner punches on the Feeder Press being set incorrectly (the folded spacer should have no corner flare on any of the corners).
(As applied to a folded INTERCEPT spacer) is the space between the two adjacent corner edges; it should be a minimum of .030″.
Load force due to glass weight.
A substance that adsorbs and holds moisture and organic and inorganic molecules. It is used to adsorb air space moisture and prevent condensation between the lites.
The temperature above 32°F at which visible water vapor or other liquid vapor begins to deposit on the air-space glass surface of a sealed insulating glass unit in contact with the measuring surface of the dew-point apparatus.
Double Glazed Units
Units of two lites of glass and one air space.
Dual Sealed Unit
Sealed insulating glass unit fabricated with an inner primary seal and an outer secondary seal. Generally, each of the two seals has been selected for its special performance characteristics, i.e.: adhesion and moisture vapor transmission properties.
Desiccant Station (stand)
The machine that applies the hot melt matrix to an Intercept spacer. It also controls the application time delays on the Extruder.
Heat energy radiated by the surface of a body, usually measured per second, per unit area.
Equivalent Combined Glass load
Combination of the instant applied load of wind and the factored long term loading of glass weight and snow accumulation.
On a rabbetted sash without stops, the triangular bead of compound is applied with a glazing knife after the bedding setting and clipping the lite in place.
Failed IG Unit
An installed unit failure exhibits permanent material obstruction of vision through the unit due to accumulation of dust, moisture or film on the internal surface of the glass. Surface numbers 2 or 3 in dual-pane units; surface numbers 2,3,4 or 5 on triple-pane units.
Puts the Intercept in a pause condition, there are two types, “feed press feed hold” and “system feed hold”.
The station on the Intercept Spacer Frame Machine that punches or stamps Intercept™ spacer material to make corners, grid punches, tabs (lead corners), gas and rivet holes. It is also referred to as the punch station, punch press, or feed press.
Feeder Press Feed Hold
The only feed hold that deactivates the air cylinders on the feeder press. The button is located on the feeder press itself.
Transparent glass with flat, parallel surfaces formed on the surface of a pool of molten tin.
(Filter/regulator/lubricator), Regulates the pressure of the air supply, filters dirt and moisture from the air supply, and lubricates the air lines and cylinders.
(FCO) The station on the Intercept Spacer Frame Machine that parts and swedges the Intercept™ spacer.
Refers to the point at which the material strip is furthest from the loop control sensor.
Fully Tempered Glass
Transparent or patterned glass with a surface compression of not less than 10,000 psi or an edge compression of not less than 9,700 psi.
Insulating glass unit with a gas other than air in the air space to decrease the unit’s thermal conductivity U-value and to increase the unit’s sound insulating value.
A hole punched approximately 1″ from the beginning of the last side of the Intercept™ spacer. It is used to fill the unit with argon or krypton.
The time rate of water vapor or gas transmission through a unit area of the material unit thickness induced by unit vapor pressure difference between two specific surfaces under specific temperature and humidity conditions.
The time rate of water vapor or gas transmission through a unit area of a body, normal to specific parallel surfaces, under specific temperature and humidity conditions.
(Polyisobutylene) A substance normally used as the primary seal of a dual seal unit.
A preformed tape continuing a built-in continuous elastomer rod to eliminate use of individual shims which can be inadvertently omitted.
A sealant applied to the inner shoulders of a spacer with its principle purpose to minimize moisture, gas and solvent migration into the unit’s air space.
Refers to the height of the spacer material; standard, low or ultra low are most common.
Structural members, generally horizontal, in slope glazing frames.
The overall resistance to heat transfer. The R-value is the reciprocal of the U-value.
A two-sided L-shaped recess in a sash frame to receive glass products. Addition of a removable stop will convert it to a glazing channel.
Movement and distortion of sash or frame because of lack of rigidity, or can be caused by adjustment of ventilator sections. Puts excessive strain on the sealant and may result in joint failure.
(Box) Spacer material used in the linear process; utilizes folding corner keys.
Reflective Coated Glass
Glass with metallic or metallic oxide coating applied onto or into the glass surface to provide reduction of solar radiant energy, conductive heat energy and visible light transmission.
Holes located at the tab and the end of the Intercept spacer; they align when the tab is inserted in the opposite end.
The station on the Intercept Spacer Frame Machine that forms the U shape spacer out of the flat coil stock.
Refers to material that joins the two lites of glass to a spacer forming a IG unit.
A permanent adhesive sealant extrusion which may contain a structural metal insert and a precompounded desiccant.
Sealed Insulating Glass Units
Units constructed of two or more lites of glass separated and hermetically sealed to spacer frames at the glass edges with the enclosed air chamber(s) dehydrated at the plant’s atmospheric pressure.
A sealant applied into the exterior glass-spacer cavity to provide elastic, structural bonding of the assembly. In single-sealed units, this sealant also has low gas and moisture vapor transmission property to achieve effective unit performance.
Rectangular, cured extrusions of neoprene rubber or other approved material on which the glass product bottom edge is placed on glazing to effectively support the glass weight.
Strain put on a compound between two surfaces when there is a slipping movement of the two surfaces, parallel to and in opposite directions along the length of the joint, such as occurs when an aluminum channel expands to a greater length than a glass panel when both are subjected to the same pronounced rise in temperature. This kind of strain tends to rub or knead the compound in opposite directions along the joint, as contrasted to other forms of strains which may try to pull the compound apart, by reason of the strain being at a right angle to the joint.
Measurement of the hardness of a cured elastomeric material by means of a durometer hardness gauge. Range of 20-25 is about the firmness of an art gum eraser. Range of 40-50 is about the firmness of a rubbr heel.
Imaginary line around the perimeter of a glazed glass product defined by the top edge of stationary and removable stops, or the line where the glazing sealant or gasket contacts the glass.
Sealed insulating glass unit where the structural bonding and moisture sealing is accomplished by a single substance (sealant).
Any installation of glass that is at a slope of 15 degrees or more from vertical.
Specific methods used in joining the spacer lengths into spacer frames including interlocking keys, bending, soldering, or welding.
The component that separates the lites of glass in an IG unit.
Small blocks of neoprene, or other approved material, placed on each side of the glass product to provide glass centering, maintain uniform width of sealant bead, and prevent excessive sealant distortion.
That portion of the exterior wall of a multi-story commercial building that covers the area below the sill of the vision glass installation and above the head of the glass installation below.
The difference in spacer width comparing the width at the top of the spacer to the width at the bottom of the spacer; it should not exceed .015″ total.
The stationary lip of the back of the glazing channel and removable molding (retainer) at the front of the glazing channel.
Structural Glazing Gaskets
Cured elastomeric channel-shaped extrusions used in place of a conventional sash to install glass products onto structurally supporting sub-frames with the pressure of sealing exerted by the insert of separate lock-strip wedging splines.
Structural silicone Glazing
A system in which the glass product is bonded to the framing members of a curtain wall utilizing a structural silicone adhesive/sealant without the presence of outdoor retainers or stops.
IG unit manufactured with a light and energy controlling film suspended within the air space.
Preformed at the flying cutoff, it slightly reduces the tab width, which makes the tab small enough to fit into the end of the spacer without forcing the spacer to flare; it should measure .025″ to .030″ less than the finished spacer width.
System Feed Hold
Puts the Intercept machine into a pause condition, continuing when feed the hold button is pulled out. It can be initiated from all machine feed hold buttons except the feeder press feed hold button. It can also be activated from the flying cutoff guards and the semi-auto mode proximity switch. A system feed hold does not deactivate the air cylinders on the feeder press.
Spacer type used in polysulfide and hand gunned hot melt applications.
Refers to the point at which the material strip is closest to the loop control sensor.
Is the time between sensor activation and extrusion application. It is set with the time delay switches on the desiccant stand.
Refers to the plating on the steel. Tin plated steel is used for manufacturing Intercept™ spacer frames.
An electrical device used on loop controls to maintain the proper material distance from the floor. It works by transmitting and receiving sound waves, then emitting a signal to the uncoiler motor.
Deformation of the spacer. Both ends of the spacer turned in opposing directions.
The amount of conductive heat energy (BTU’s) transferred through a one-square-foot area of a specific insulating glass unit for each degree Fahrenheit temperature difference between the indoor and outdoor air. It is the inverse of the R-value; U=1/R.
Warm Edge Technology
Is used to define thermal characteristics for the edge of glass region of the IG unit in relation to heat loss as well as to condensation potential.
Slots or holes in the sill (bottom) member of the sash frame to provide outdoor release of infiltrated water.
The area of seal created by the butyl to glass press after the butyl/glass is heated and pressed. This is also called seal width or MVT path.