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Summary: Building dictionary to explain building jargon and terminology from A - Z.
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Building dictionary for the letter S - Page 21
Smoke detection system
A general term for an internal system, such as one employing sensors and alarms that detect the presence of smoke in a building.
Smoke shelf
A concave shelf at the back of a smoke chamber to redirect downdrafts up the chimney.
Smoke test
A test using a nontoxic, visible smoke to determine the routes taken by air currents and/or to detect leaks.
Smokestop
A partition intended to retard the spread of smoke. Any opening in a smokestop should be protected by a door with an automatic closer.
Smoothing plane
A small, fine carpenter's plane used for finishing.
Smudge
(1) An accidental mark or smear on a surface. (2) A paint primer made from the scraping of paint pots. (3) A mixture of glue and lamp black spread on a surface to prevent adhesion of solder.
Snatch block
A pulley or block with a side that can be opened to receive a rope or line.
Snips
See tin snips.
Snow load
The live load allowed by local code, used to design roofs in areas subject to snowfall.
Soakaway
An excavated pit designed to receive excess surface water for gradual draining.
Soaker
A piece of flashing used on a slate roof at a hip or valley, or at the intersection of a roof and a vertical wall.
Soapstone
A soft rock containing a high proportion of talc; used for such items as sinks, bench tops, and carved ornaments.
Socket
(1) British term for the enlarged end of bell-and-spigot pipe. (2) A mechanical device for supporting a lamp or plug fuse and completing the electric circuit. (3) See coupling.
Socket plug
A plug for the end of an interior-threaded pipe fitting consisting of a threaded piece with a recess into which a tool is placed to turn it.
Socket weld
A pipe joint made by use of a socket weld fitting which has a female end or socket for insertion of the pipe to be welded.
Socket wrench
A box wrench with a recessed socket at the end of a shank that fits over the head of a nut or bolt for tightening or removing the nut or bolt.
Sod
(1) The upper layer of soil containing grass roots. (2) High quality grass grown commercially for use in landscaping. Laid as a finished lawn.
Sodium light
The orange-yellow light from a low-pressure sodium-vapor lamp.
Sodium vapor lamp
An electric discharge lamp that produces light when sodium vapor is activated by current passing between two electrodes. Commonly used in street lights, they can take three to four minutes to warm up to full light output.
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