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. Includes studs as well as the frame and trim.
Joint- The location between the touching surfaces of two members
or components joined and held together by nails, glue,
cement, mortar, or other means.
Joint
cement or Joint compound- A powder that is usually
mixed with water and used for joint treatment in gypsum-wallboard
finish. Often called "spackle" or drywall
mud.
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- Wooden 2 X 8's, 10's, or 12's that run parallel to one
another and support a floor or ceiling, and supported
in turn by larger beams, girders, or bearing walls.
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.