- any of a number of small, parallel beams of timber, steel, reinforced concrete, etc., for supporting floors, ceilings, or the like.
- to furnish with or fix on joists.
Origin of joist
Examples from the Web for joist
He put his knee against it and shoved, but the joist held firm.The Web of the Golden Spider
Frederick Orin Bartlett
Fitz moved, joist in hand, towards the other side of the clump.Fitz the Filibuster
George Manville Fenn
A joist was found on one end, driven nearly three feet into the ground.The Book of Curiosities
No man, other than a union carpenter, would be allowed to even set a joist.30,000 Locked Out.
James C. Beeks
A roar of applause shook every board and joist of the building.The Every-day Life of Abraham Lincoln
Francis Fisher Browne
- a beam made of timber, steel, or reinforced concrete, used in the construction of floors, roofs, etcSee also rolled-steel joist
- (tr) to construct (a floor, roof, etc) with joists
Word Origin and History for joist
early 14c. (late 13c. in Anglo-Latin), from Old French giste "beam supporting a bridge" (Modern French gîte), noun use of fem. past participle of gesir "to lie," from Latin iacere "to lie, rest," related to iacere "to throw" (see jet (v.)). Notion is of wooden beam on which boards "lie down."