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to a letter:
J
J Channel:
Metal edging used on drywall to give the edge
a better finished appearance when a wall is not "wrapped."
Generally, basement stairway walls have drywall only on
the stair side. J Channel is used on the vertical edge of
the last drywall sheet.
Jack Post:
A type of structural support made of metal which
can be raised or lowered through a series of pins and a
screw to meet the height required. Basically used as a replacement
for an old supporting member in a building. See Monopost.
Jack Rafter:
A rafter that spans the distance from the wall
plate to a hip, or from a valley to a ridge.
Jamb:
The side and head lining of a doorway, window, or other
opening.
Joint:
The space between the adjacent surfaces of two
members or components joined and held together by nails,
glue, cement, mortar, or other means.
Joint Cement:
A powder that is usually mixed with water and
used for joint treatment in gypsum-wallboard finish. Often
called "spackle."
Joint Compound:
A material applied to threaded connections to
help prevent leaks in plumbing. Also, in carpentry, a wet
gypsum material applied to sheetrock joints.
Joint Tenancy:
A form of ownership in which the tenants own a
property equally. If one dies, the other automatically inherits
the entire property.
Joint Trench:
When the electric company and telephone company
dig one trench and "drop" both of their service
lines in.
Joist Hanger:
A metal "U" shaped item used to support
the end of a floor joist and attached with hardened nails
to another
bearing joist or
beam.
Jumpers:
Water pipe installed in a water meter pit (before
the water meter is installed), or electric wire that is
installed in the electric house panel meter socket before
the meter is installed. This is sometimes illegal.
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