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Glazing Glossary
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Dead Load
The vertical load due to the weight of all permanent structural and non-structural
components of a building, such as walls, floors, roofs, and fixed service equipment.
Dry Glazing
A method of securing glass in a frame that uses preformed, resilient gaskets instead of a wet sealant or glazing compound.
Extrusion
A framing member or other type of component formed by forcing aluminum or vinyl through a shaped opening.
Flashing
Metal or other suitable material placed to shed water.
Flush Glazing
A system of installing glass in which the member that holds the glass in place (the glazing bead) is recessed within and flush with the edge of the frame. These Systems are also called "pocket-glazed" and "center-glazed" systems.
Head
The horizontal member that forms the top of a frame.
Inside Glazing
A method in which glass is secured in an opening from the interior of the building.
Insulating Glass
An integral glass unit made up of two or three individual lites of glass separated by an air space.
Jamb
One of two vertical members of a door or window frame.
KD
An abbreviation for "knock down."
Level
The condition of perfect horizontal alignment.
Lintel
A horizontal structural member that spans an opening at the head to carry the weight of construction above the opening.
Miter Joint
A joint made up of two members each of which is cut at one-half the total angle of the joint.
Mullion
An intermediate, vertical or horizontal framing member.
Outside Glazing
A method in which glass is secured in an opening from the exterior of the building.
Plumb
The condition of perfect vertical alignment.
Pocket Filler
An extrusion that snaps into a mating vertical or horizontal member to provide a glazing pocket.
Pressure Plate
In certain glazing systems, a member that bolts to a mullion to secure the glass. Pressure plates are usually concealed by a cover that snaps onto them.
Receptor
The channel placed at the head and sill in certain types of glaring systems that hold the vertical mullions. Sometimes called "cans."
Screw Spline
A type of joinery that uses a two-piece, snap-together mullion. The splines are extruded into the female framing member and receive a special type of fastener.
Setting Block
A small piece of neoprene, EPDM rubber, silicone, or other material placed in a frame to distribute the weight of the glass, to center the glass vertically within the frame, and to prevent glass-to-metal contact.
Shear Block
A type of joinery that uses a clip (the shear block) attached to a vertical mullion. The horizontal member fits over the clip and is secured to it by screws driven into the shear block
Shim
A spacer of uniform thickness and varying sizes used to plumb and level frames.
Sidelite
The glazed frame or frames placed on one or both sides of a door.
Sill
The bottom member of a framing system.
Steel Reinforcing
A steel component placed within a vertical mullion to add stiffness and increase the wind load capability of the system.
Thermal Break
An insulating material of low thermal conductivity placed between materials of high thermal conductivity within the system itself to inhibit the flow of cold or heat.
Weep Whole
A small opening in the sill that allows infiltrated water to drain out of the frame.
Wet Glazing
A method of securing glass in a frame that uses sealants or glazing compounds instead of preformed, resilient gaskets.
Wind Load