Dictionary Meaning and Definition on 'Joist'
n : beam used to support floors or roofs
- Joist \Joist\, n. [OE. giste, OF. giste, F. g[^i]te, fr. gesir
to lie, F. g['e]sir. See Gist.] (Arch.)
A piece of timber laid horizontally, or nearly so, to which
the planks of the floor, or the laths or furring strips of a
ceiling, are nailed; -- called, according to its position or
use, binding joist, bridging joist, ceiling joist,
trimming joist, etc. See Illust. of Double-framed floor,
under Double, a.
- Joist \Joist\, v. t. [imp. & p. p. Joisted; p. pr. & vb. n.
To fit or furnish with joists. --Johnson.
Wikipedia Meaning and Definition on 'Joist'
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 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.[See more about Joist at Dictionary 3.0 Encyclopedia]
Words and phrases related to 'Joist'
Joist Sample Sentences in News
- Insul-Cube Testing Proves Air Blocking Ability in Third-Party Testing
National Fiber’s NEW Insul-Cube Rim Joist Insulation System is third-party tested for air blockage. Passes with amazing results. (PRWeb November 25, 2013) Read the full story at http://www.prweb.com/releases/2013/11/prweb11363885.htm Read more on this news related to 'Joist'
- National Fiber's New Innovative Insul-Cubes Outperform Conventional Rim Joist Insulations
National Fiber's New Insul-Cubes thermally out-perform conventional rim joist insulations. The ease of use and quick install time makes it a favorite among contractors and installers. (PRWeb November 14, 2013) Read the full story at http://www.prweb.com/releases/2013/11/prweb11325904.htm Read more on this news related to 'Joist'
- Homefix: Arrows on floor joists indicate bowed wood
Q: I took your advice and inspected my crawl space. The crawl space is dry, but I noticed almost all the floor joists had arrows drawn on the side with the arrow pointing to the rooms above. Why are the boards marked? None of the wood I found at the lumberyard was marked like this. Read more on this news related to 'Joist'