Therma-Tru SHOP 1 General Information - U1 Revised - Manual (Page 7)

General
Information
Shop 1 2014 (U1 REVISED) 1.7
Glossary of Door Shop Terms
Lock Block: A rectangular block of wood
or other solid material, placed inside a door
assembly at the lock side edge, which re-
inforces the assembly when the lock hard-
ware is installed.
Lock Bore: For cylindrical locksets, the
large through hole, usually 2-1/8 inches in
diameter, bored near the door panel’s lock
edge, into which the lock mechanism is
placed and installed.
Lock Stile: In insulated door assemblies,
the full-length part, usually wood, which
makes up the lock edge of the door panel.
In wood stile and rail doors, the full length
wood piece, 4 to 6 inches wide, at the lock
edge of the door.
Low-E Glass: Glass which has been facto-
ry coated with a thin layer of material, nearly
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and light energy.
LSL: Abbreviation for laminated strand
lumber. LSL is used in the construction and
building materials industry as a more cost
effective structual support material versus
dimensional lumber.
LVL: Abbreviation for laminated veneer
lumber. LVL is a manufactured wood prod-
uct, in which veneer layers are adhesively
bonded into a layup of multiple thicknesses.
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used for structural purposes.
Miter: An angled cut across the end of a lin-
eal part, usually done to join with a similarly-
cut part at a corner.
Mortise: A recess cut into the surface or
edge of a part, usually for the purpose of
housing hardware such as hinges and lock
parts.
Mortise-Type Lock: A lockset which usu-
ally has a rectangular-shaped mechanism,
which is housed into a deep recess cut into
the edge of a door.
Mull: A short term for mullion. Used occa-
sionally as a verb to describe the joining of
two door units together, or the joining of a
door to a sidelite unit.
Mulled: An adjective describing a door and
sidelite unit which has been made up by
edge-joining two framed units together.
Mullion: A post or divider which runs from
sill to frame top in a multi-panel door, door,
or door and sidelite assembly. In stile and
rail doors, the vertical wood parts which
separate panels.
Multiple Extension Unit: In patio door as-
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frame, edge-joined to a patio door unit to
add another glass panel to the installation.
Multi-Point Hardware: Any hardware that
has multiple locking points which simultane-
ously lock into place through the action of
a continuous travel drive rail activated by a
handle.
Muntins: In glazed lite assemblies, thin ver-
tical and horizontal divider bars, which give
the lite a multi-paned look. Muntins may
be part of lite frames, and on the outside
surface of the glass, or assembled between
glass in insulated glass units.
Nailing Fin: A feature of some windows
and patio doors which permits installation
and fastening to a rough opening by nails or
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side edges of the unit, into the surrounding
frame of the opening.
NFRC: Initials for National Fenestration
Ratings Council, an industry association
which sets standards for testing, rating, and
labeling doors and windows with heat trans-
mission and energy information.
Night Latch: A lever or knob-actuated bolt