\ ˈjȯist How to pronounce joist (audio) \

Definition of joist

: any of the small timbers or metal beams ranged parallel from wall to wall in a structure to support a floor or ceiling

Illustration of joist

Illustration of joist

J joist

Examples of joist in a Sentence

Recent Examples on the Web Next, locate the center of the wall stud or ceiling joist. Joseph Truini, Popular Mechanics, "Common Home Repairs You Can Do on Your Own," 25 Aug. 2020 And whenever possible, drive the screws into a floor joist below. Joesph Truini, Popular Mechanics, "8 Steps for Installing Laminate Flooring," 8 Dec. 2019 The colony built its hive in the floor joists between the upstairs and downstairs in his home. Mallory Hughes, CNN, "He suspected the buzzing in his ceiling were bees. He just didn't expect to find 100,000 of them," 11 May 2020 Or to learn that the lustrous floor is made of boards of longleaf pine, salvaged from the original floor joists. Michael J. Lewis, WSJ, "An Education in Sarasota Styles," 25 Jan. 2020 Meanwhile, once the balconettes were removed from Promont, the contractor found the damage extended along joists that run under the floor of the observation level of the tower, Amann said. Jeanne Houck,, "Greater Milford Area Historical Society to state: Help us fix museum," 3 Nov. 2019 Built out of composite decking and pressure treated joists, sturdy 2 by 12’s, handrails, and balusters, the ramp had three wide landings for turning wheelchairs. Denise Coffey,, "Ellis Tech Carpentry Students Measure Up," 7 Oct. 2019 The home was erected using steel-joist construction of concrete and metal for outstanding strength-to-weight ratio and high durability. Mary Wakeford, azcentral, "Couple finds the perfect Victorian home in Peoria. Take a look," 22 Aug. 2019 But the second time around, the building department required that the end of every floor joist be cut at a sloping angle. Roy Berendsohn, Popular Mechanics, "An Ode to the Circular Saw," 6 June 2014

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'joist.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of joist

15th century, in the meaning defined above

History and Etymology for joist

Middle English giste, joiste, from Anglo-French giste, from Vulgar Latin *jacitum, from Latin jacēre to lie — more at adjacent

Keep scrolling for more

Learn More about joist

Time Traveler for joist

Time Traveler

The first known use of joist was in the 15th century

See more words from the same century

Statistics for joist

Cite this Entry

“Joist.” Dictionary, Merriam-Webster, Accessed 22 Jan. 2021.

Keep scrolling for more

More Definitions for joist


How to pronounce joist (audio)

English Language Learners Definition of joist

: a strong, heavy board that supports a floor or ceiling


\ ˈjȯist How to pronounce joist (audio) \

Kids Definition of joist

: any of the small timbers or metal beams laid crosswise in a building to support a floor or ceiling

More from Merriam-Webster on joist

Nglish: Translation of joist for Spanish Speakers Encyclopedia article about joist

Comments on joist

What made you want to look up joist? Please tell us where you read or heard it (including the quote, if possible).


Test Your Vocabulary

Slippery Words Quiz—Changing with the Times

  • ducreux self portrait yawning
  • What is an earlier meaning of nice?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

Universal Daily Crossword

A daily challenge for crossword fanatics.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!