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floor joist

floor joist

1 5.2
A long piece of wood or metal under a floor that supports it
  • noun
  • /flɔr dʒɔɪst/
  • Specialized
translation icon : viga de piso
  • It soon became clear that the plumber who installed it soldered the water pipes up between two of the floor joists after the tank was in place.
  • nail floor joists
  • perpendicular to floor joists
  • floor joists in place

Examples

  • Proper installation of floor joists is essential for the stability of the entire structure.

  • The contractor recommended using treated wood for the floor joists to prevent rot.

  • I screwed a a very heavy duty eye bolt right into the floor joist and that way it's not going anywhere.

  • For four days, I worked in the basement blocking the floor joists.

    Fiction book (1995)
  • By working all day, he was able to finish nailing in the floor joists.

    Fiction book (1990)
  • I shifted my weight, creaking the floor joist.

    Fiction book (2001)
  • The floor joists were creaking again under the weight of the sand dune.

    Fiction book (2001)
  • These rough-sawn planks were finished with plain, squared edges; laid side by side; and face-nailed into the floor joists.

    Blog text (22)
  • We replaced the old floor with new boards supported by sturdy floor joists.

Synonyms

beam
vsfloor joist
104 2.7

A long strong piece of wood, metal, or concrete that supports part of a building

is narrower used only as horizontal support for a room level
joist
vsfloor joist
5 7.5

A long strong piece of wood, metal or concrete that supports floors and ceilings

is specifically horizontal and supports a room level only

How Strong

girder
  • Specialized
14 5.0
beam
104 2.7
floor joist
  • Specialized
1 5.2
plank
56 1.7
board
274 1.0

Surface Forms

floor joist singular
floor joists plural

Morphology

floor + joist

The compound 'floor joist' is directly built from 'floor' (the room's bottom surface) modifying 'joist' (a structural beam), so its meaning — a joist that supports a floor — is transparently derivable from the constituents. This noun–noun composition follows regular English compounding patterns and has clear equivalents in many languages, making it immediately understandable to learners who know both words.

Etymology

The term floor joist comes from building work: a joist is a strong horizontal beam that sits under the floor to 'hold it up'. So, floor joist means 'a beam that supports a floor'.