Glossary of Stair Parts, Doors, Frames & Jambs, Hinges and Hardware
Anchor: A supportive device that secures a structure or object in place.
Apron: A decorative trim installed against the wall under a window stool or stair tread.
Baluster: A baluster is a stair part that is a vertical post supporting the handrail of a staircase.
Balustrade: A row of balusters topped by a handrail on the edge of stairs, balconies, and decks.
Bearing Hinge: A hinge equipped with bearings to reduce friction.
Casing: The moulding or trim that surrounds a door or window frame.
Crown Moulding: Decorative trim placed at the top of a wall where it meets the ceiling.
Cylinder Lock: A type of lock in which a cylinder rotates to move the lock bolt.
Deadbolt: A lock bolt that is moved by turning a knob or key without the action of a spring.
Door Frame: The structure in which a door sits.
Door Jamb: The vertical parts of a door frame, onto which a door is secured.
Dowel: A pin used for strengthening a joint.
Easing: A part of a handrail that curves or angles to meet the newel post.
Escutcheon: A protective plate surrounding a keyhole or lock.
False Tread: A decorative element used to give the appearance of a solid tread.
Finial: A decorative element, often bulbous, at the top of a newel post.
Flush Door: A door with a flat surface, typically with a core of solid or composite material.
Gooseneck: A handrail fitting shaped like an S-curve that transitions from one level to another.
Guardrail: A protective barrier on a landing, platform, or balcony to prevent falls.
Handrail: The part of the staircase that you hold onto as you climb up or down.
Hinge: A movable joint used to attach, support, and permit the turning or swinging of a door, lid, or gate.
Hollow Core Door: A door constructed with a hollow interior, making it lightweight and inexpensive.
Inswing Door: A door that opens inward.
Jamb: See Door Jamb.
Joint: The point at which two components of a structure join.
Knob: A round handle on a door or drawer.
Knuckle: The joint part of a hinge that allows for the pivot.
Landing: A flat area halfway up the stairs or at the top or bottom.
Latch: A device that holds a door, gate, or window closed, consisting of a bar that falls into a slot.
Mortise: A cavity made in a piece of wood or other material to receive a tenon or a hinge.
Moulding: A decorative strip of material used to cover transitions between surfaces or for decoration.
Newel Post: A large post used to anchor the handrail of a staircase.
Nosing: The part of a stair tread that overhangs the riser below.
Outswing Door: A door that opens outward.
Overlay Door: A door that rests on the outside of the door frame.
Panel Door: A door consisting of panels (usually four or six) held within a framework of stiles and rails.
Pivot Hinge: A hinge that supports the bottom of a door and is located at the top and bottom of the door.
Quarter Turn: A 90-degree turn in the direction of a staircase.
Rail: A horizontal piece in a door panel or the part of the stair you hold (handrail).
Riser: The vertical portion of a step between two stair treads.
Rosette: A round, stylized floral design.
Saddle: Another term for a door threshold.
Solid Core Door: A door made from solid materials offering high performance in sound reduction and durability.
Stringer: The structural component that supports the treads and risers in standard staircases.
Stile: The vertical pieces on the sides of a door.
Strike Plate: The metal plate that catches and holds the latch or bolt on a door lock.
Swing: The direction in which a door or gate opens.
Threshold: A strip of metal or wood that lies at the bottom of a door frame.
Tread: The part of the stair that you step on.
Undercut: The cut-out portion at the bottom of a door to clear the finished floor and threshold.
Volute: A spiral or twist in a staircase handrail at the start of the stairs.
Winder: A stair that is narrower on one side than the other, used to change the direction of a staircase.
Weatherstripping: Material used to seal gaps around windows and doors.
X Brace: A diagonal brace across a door or gate.
Yoke: The frame on which a door swings.
Z Brace: A diagonal brace on a door