Saddle: In adjustable sills, another term for riser. Also, a shop-applied label applied around the corner or edge of a door, which provides identification and installation instructions.
Safety Glass: Glass which, when broken, shatters into small pieces without sharp edges.
Score: A line (as a scratch or incision) made with or as if with a sharp instrument.
Screen Track: A feature of a door sill or frame head that provides a housing and runner for rollers to allow a screen panel to slide from side to side in the door.
Scribe: A mark for a cut that has been made by using a template or pattern.
Sealant: Elastic material pumped or troweled into a joint to prevent water penetration.
Self-Cased: A steel frame for which the edge detail finishes to the surrounding wall, without the need for additional applied casing moulding.
Self-Locating Hinge: A hinge with indexing or locating tabs to aid in exact placement against a door edge.
SHGC: Solar Heat Gain Coefficient. SHGC refers to a window’s ability to transmit solar radiation. The SHGC ranges from 0–1. A value of 0 indicates that window functions like a wall, essentially preventing any solar energy from entering the building. A value of 1 indicates that the window functions like an opening, allowing all solar energy in. In cold climates, a high SHGC can lower heating costs by using passive solar heating. In warm climates, a low SHGC is desired to keep unwanted heat out and reduce cooling costs.
Shim: A thin piece of material used between parts of an assembly, to change and fix the distance between parts when parts are fastened.
Sidelite: A fixed narrow panel, installed next to a door panel, for decorative purposes. Sidelites almost always contain glasslites.
Sill Saddle: See Riser.
Slide Bolt: The part of an astragal assembly which, by means of moving latches at tops and bottoms of astragals, places bolts into frame heads and sills, for fixing passive door panels closed.
Smoke & Draft Door: Where building codes define use, a fire door that has been rated for 20-minute fire resistance and that does not need test certification as having passed the hose stream portion of the fire test.
Spacer, Glass Spacer: A lineal part with rectangular cross section, running along the perimeter edges, between the glass pieces of an insulating glass unit.
Speak Easy: A speak easy is a small opening within a door at eye level that allows you to see who is outside without opening the door.
STC: Abbreviation for sound transmission coefficient. A value that describes in relative terms the ability of a door to dampen the passage of noise. Doors with higher STC values permit less noise to pass through.
Stile: In insulated door panels, the full-length parts, usually wood, that make up the long edges. In stile and rail doors, the vertical edge parts.
Strike: A metal part with a hole or recess for receiving a door latch, also with a curved or ramped face so a spring-loaded latch contacts it when closing. Strikes are fit into mortises in door jambs or mullions and screw-fastened.
Style: A number or name defining a door design or configuration.
Subfloor: The concrete or wood floor surface lying under the finished floor. Prehung door assemblies are installed atop the subfloor.
Substrate: The base or core material in an assembly of parts. In sills, the full length wood or composite part of the sill, visible only from the bottom side or ends.