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J

Jack stud

A Jack stud is a partial-length stud that serves as a stilt or brace underneath each end of a header. Installed in pairs and fastened to the king studs, these define the left and right inside dimensions of the rough opening. Also referred to as a trimmer stud



Jig saw

A jig saw is avariable speed handheld saw with a flat base is used to cut curves out of material using a small straight reciprocating blade


Joist hanger

Special metal hardware used to make joist end connections in a floor frame. Specific fasteners are required to hold the framing to the hanger


Junction box

A junction box is a plastic or metal enclosure that houses outlets, switches, wire ends, and connections for user and fire safety purposes