Sapwood
Performs the living functions of the tree. Located just below the Cambium Layer. Generally lighter in color that the heartwood.
Shake
Separation along the grain, the greater part of which occurs between the rings of annual growth.
Shank (of a knob)
The projecting stem of a knob into which the spindle is fastened.
Shims
A split repaired in a piece of wood veneer.
Show-through
Irregular surfaces visible on the face of a wood flush door.
Slip Match
Matching between adjacent veneer leaves on one panel face. Adjoining leaves of veneer are slipped out in sequence, with all the same face side being exposed.
Softwood
Generally obtained from coniferous trees. Doses not refer to the specific density or resistance to wear and abuse.
Spindle (of a knob)
The bar or tube connected with the knob or lever handle that passes through the hub of the lock or otherwise engages the mechanism to transmit the knob action to the bolt(s).
Spline Joint
When a strip of wood or compressed "biscuit" is placed into a premachined slot or groove and glued to reinforce and align the joint.
Spring Hinge
A hinge containing one or more springs to move the door into the desired position. It may be either single or double acting.
Standard Door
By industry practice, a standard door is book size in both width and height.
Stile (of a door)
A vertical member of the door structure; each door has two, a lock stile and a hinge stile.
Stiles
Upright or vertical pieces of the framework of a wood flush door.
Stop (of a lock)
The button, or other small device, which serves to lock the latch bolt against the outside knob or thumb piece or unlock it if locked. Another type holds the bolt retracted.
Streaks, Mineral
Natural discoloration's of the wood substance.
Strike
A metal plate or box which is pierced or recessed to receive the bolt or latch when projected. Sometimes called Keeper.
Structural Composite Lumber (SCL)
A generic term that describes a family of engineered wood products that combine veneer sheets or strands or other small wood elements with exterior structural adhesives to form lumber-like structural products.
Surface Hinge
One having both leaves surface applied.
Tape
Strips of gummed paper used to hold edges of veneer together at the joints before gluing.
Telegraphing
In veneer work, the variations in the surface refraction as a result of the stile, rail, and core show-through to the face of the panel or door. The selection of high gloss laminates and finishes should be avoided because they tend to accentuate natural telegraphing.
Thimble
The socket or bearing attached to an escutcheon plate in which the end of the knob shank rotates.
Threshold
A strip fastened to the floor beneath a door, usually required to cover the joint where two types of floor material meet.
Throw (of a dead bolt or latch bolt)
Measurement of the maximum projection when bolt is fully extended.
Thumb Piece (of a handle)
The small pivoted part above the grip of a handle to be pressed by the thumb to operate a latch bolt.
Topcoat
In finishing, the final finishing steps providing protection and the finished appearance.
Transom Bar
That part of a door frame that separates the top of a door or a window from the bottom of the transom.
Transom Catch
A fastener applied to a transom and having a ring by which the latch bolt is retracted.
Transom Chain
A short chain used to limit the opening of a transom; usually provided at each end with a plate for attachment.
Transom Lift
A vertically operated device attached to a door frame and transom by which the transom may be opened or closed.
Tumbler
A guard or obstruction which prevents operation of a bolt except by insertion of the proper key.
Types (door styles)
The selection includes exterior entrance doors, interior passage doors, French or casement doors, bi-fold doors, side lites, patio sliding and swinging doors, thermal insulated-glass doors, louver doors, screen doors, and specialty door products.
