Hand tool which smoothes surfaces and straightens edges, with its long base, on long cuts of wood.
Jointure
A general woodworking term used for better-quality wood-joint construction.
Joist
Horizontal, parallel beams directly supporting the boards of a floor or the laths of a ceiling.
Joist cleating
Installation of cleats on existing joists and beams to support additional joists that are added.
Joist hanger
Sheet metal fixture that is preformed and connects the end of a joist to a structural piece that is at right angles to the joist.
Joist tie-in
Adding joist so that the new joist rests on the existing sill.
Joule's law
The rate of heat production by a steady current in any part of an electrical circuit that is proportional to the resistance and to the square of the current, or, the internal energy of an ideal gas depends only on its temperature.
Journal
Rotary axle or shaft portion, which turns in a bearing.
Journal box
A casing or housing for a journal, which is the rotary axle or shaft portion, which turns in a bearing.
Journeyman
Worker, who has already served his apprenticeship to work in a trade such as plumbing or carpentry, but who is not yet a supervisor.
