What's the difference between interjoist and joist?

Interjoist

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Definition:

• (n.) The space or interval between two joists.
• (n.) A middle joist or crossbeam.

Example Sentences:

Joist

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Definition:

• (n.) 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.
• (v. t.) To fit or furnish with joists.

Example Sentences:

• (1) This may be because the joists below are defective – it’s worth seeking professional advice in this instance.
• (2) They are constructed using rows of thick wooden beams, called joists, topped by floorboards running at a right angle to the joists.
• (3) The lines of nails on the boards indicate the position of the joists underneath.
• (4) They unloaded bags, tools and two wheelie bins, which they carried (or wheeled) in through the fire escape, and large metal joists.