joist
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(joist) 
n.
Any of the wood, steel, or concrete beams set parallel from wall to wall or across or abutting girders to support a floor or ceiling.
tr.v., joist·ed, joist·ing, joists.
To construct with joists.
n.
Any of the wood, steel, or concrete beams set parallel from wall to wall or across or abutting girders to support a floor or ceiling.
tr.v., joist·ed, joist·ing, joists.
To construct with joists.
[Middle English giste, joiste, from Old French giste, from feminine past participle of gesir, to lie, lie down, from Latin iacēre.]
One of a series of parallel beams of timber, reinforced concrete, or steel used to support floor and ceiling loads, and supported in turn by larger beams, girders, or bearing walls; the widest dimension is vertically oriented. Also see binding joist, boarding joist, bridging joist, ceiling joist, common joist, floor joist, principal joist, sleeper joist.
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categories related to 'joist'
- Building and Machine Parts - joist: horizontal support beam for floor or ceiling
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Look up joist in Wiktionary, the free dictionary. |
A joist, in architecture and engineering, is one of the horizontal supporting members that run from wall to wall, wall to beam, or beam to beam to support a ceiling, roof, or floor. It may be made of oriented strand board, plywood, wood, steel, or concrete. Typically, a beam is bigger than, and is thus distinguished from, a joist. Joists are often supported by beams and are usually repetitive.
The wider the span between the supporting structures, the deeper the joist will need to be if it is not to deflect under load. Lateral support also increases its strength. There are approved formulas for calculating the depth required and reducing the depth as needed; however, a rule of thumb for calculating the depth of a wooden floor joist for a residential property is half the span in feet plus two inches; for example, the joist depth required for a 14-foot span is 9 inches. Many steel joist manufacturers supply load tables in order to allow designers to select the proper joist sizes for their projects.
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Engineered wood products such as I-joists gain strength from the depth of the floor or the height of each joist. A common saying in the industry is that deeper is cheaper, referring to the lower quality but often more cost effective joists designed for joist depths of 14 inches or more.
Bandsill is another term for joist used by construction workers and home inspectors in the southeastern United States.
See also
This entry is from Wikipedia, the leading user-contributed encyclopedia. It may not have been reviewed by professional editors (see full disclaimer)
Translations:
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Joist
Dansk (Danish)
n. - gulvbjælke, loftsbjælke, underligger
v. tr. - lave flader med bjælker/underliggere
Français (French)
n. - solive, poutre
v. tr. - mettre des solives
Deutsch (German)
n. - Deckenbalken, Träger
v. - mit Trägern bauen
Ελληνική (Greek)
n. - (οικοδ.) πατόξυλο, δοκάρι, πάτερο
v. - στηρίζω με δοκό
Português (Portuguese)
n. - viga (f), trave (f)
v. - construir com vigas
Русский (Russian)
балка, стропило
Español (Spanish)
n. - vigueta, viga
v. tr. - colocar vigas o viguetas
Svenska (Swedish)
n. - tvärbjälke, golvbjälke, takbjälke
v. - spänna tvärbjälke
中文（简体）(Chinese (Simplified))
托梁, 桁, 为...架搁栏, 为...架拖架
中文（繁體）(Chinese (Traditional))
n. - 托梁, 桁
v. tr. - 為...架擱欄, 為...架拖架
한국어 (Korean)
n. - 장선 , 대들보
v. tr. - 장선을 대다
العربيه (Arabic)
(الاسم) رافدة, كمرة من الصلب (فعل) صلح الرافدة
עברית (Hebrew)
n. - קורת תמיכה מעץ (בבניין)
v. tr. - התקין קורות תומכות
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The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.
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McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc. All rights reserved.
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