Commercial Door Terminology

Backset: explains the distance from the edge of the door to the center of the drilled hole

Book Size: the height and width of a door before prefitting

Chalk:   colored chalks used for marking defects requiring repair on doors

Chicken Tracks: expression referring to scars caused by air routes or vines, resembling a chicken's footprint

Deadbolt: locking mechanism mostly used for entrance doors

Edge Band: strip along the outside edges of a door

Finials: decorative tips at the top and bottom of hinges

Gap: open splits in the inner plies

Hinges: metal objects that attach the commercial door to the jamb

Patches: matching wood pieces inserted into the door face

Rail Bottom: bottom cross or horizontal piece of a door

Rail Top: top cross or horizontal piece of a commercial door

Satin Brass (or US4): a glass finish that is not shiny

Show-Through: irregular surfaces showing through on a wood flush door

Standard Door: according to the industry practice, a standard door has book size width and height

Types: the selection of doors including casement doors, entrance doors, French doors, louvers doors, interior passage doors, bi-fold and side lights, screens doors, patio sliding and swinging doors, and specialty doors

Cup: curvature along the width of a door

Twist: refers to a deviation where one or two corners of a door are out of plane

Wood Flush Door: refers to a variety of door types based on wood, consisting of core, stiles and rails, or two-face panels