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Glossary
Glossary of 7847 Property Development Terms
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 Plane - All-purpose and most useful of all bench planes. Used to smooth rough boards and flatten uneven surfaces.
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.
Jacket Aluminium - A watertight outer housing, fashioned from aluminium, placed around a pipe or vessel.
Jalousies Window - Windows with movable, horizontal glass slats angled to admit ventilation and keep out rain. This term is also used for outside shutters of wood constructed in this way.
Jam - An upright surface that lines an opening for a door or window.
Jamb - The vertical members of a window or door frame.
Janka Test - A hardness test, usually for wood flooring, rating is pounds of pressure required to press a steel ball .444 inches in diameter one half way into the wood.
Japan Baking - An enamel to which the artificial heat of an oven is usually applied in order to attain the maximum hardness or toughness of film.
Japanese Panel Saw - Although it looks like a standard Western hand saw, actually a Japanese tool. The unique tooth design helps reduce friction at the beginning of the cutting stroke while increasing the cutting action throughout the stroke.
Jenkins Head Roof - A gabled roof with its apex truncated by a small hipped roof.
Jet Air - In blast cleaning, type of blast cleaning gun in which the abrasive is conveyed to the gun by partial vacuum.
Jig - A device used to hold work or act as a guide in manufacturing or assembly.
Jig Saw - Freehand curve-cutting machine (along with the band saw) with fine-tooth blades that can cut intricate patterns and smooth edges in thinner stock. Operates with little vibration, quick blade changes and easy-to-operate clamps. Is stationary, as opposed to a sabre saw, which is portable.
Jigsaw - Freehand curve-cutting machine (along with the band saw) with fine-tooth blades that can cut intricate patterns and smooth edges in thinner stock. Operates with little vibration, quick blade changes and easy-to-operate clamps. Is stationary, as opposed to a sabre saw, which is portable.
Joiner - A craft worker skilled in woodwork, especially of the structural kind.
Joiner Machine - A machine to true the edges of boards usually in preparation for gluing.
Joiner Pencil - Rectangular shaped pencil, about 1/4" X 1/2", with a 1/16" X 3/16" lead.
Joiner Plate - A tool designed to quickly and accurately cut matching slots in pieces that are to be joined with a small carbide-tipped blade
Joint - The connection on two pieces of building material.
Joint Agents - When the seller commissions two independent Estate Agents to sell their house.
Joint Bed - The horizontal layer of mortar in which a masonry unit is set.
Joint Bell And Spigot - A type of joint used in cast iron pipe where a male pipe end (the spigot) slips into a female end (the bell) and is then caulked with oakum and sealed with lead.
Joint Biscuit - An oval shapped disk that when inserted in a slot with glue swells to form a tight bond. A special tool is required to cut the slot.
Joint Box - Square shaped finger joints used to join pieces at right angles.
Joint Butt - - A plain square joint between two members.
- In wallpaper, a joint made by trimming both selvedges and butting the edges together; this is used in highest type of work.
- The cut ends of gypsum board placed adjacent to one another.
- The joint between two bricks placed end to end in the same course; also called Cross Joint, Head Joint, or Vertical Joint.
Joint Case - A type of joint used in cabinetmaking in which the two pieces are butted together at an angle and fastened by dowels.
Joint Cement - A powder that is usually mixed with water and used for joint treatment in gypsum-wallboard finish, often called spackle or drywall mud.
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 Control - A control joint controls or accommodates movement in the surface component of a roof.
Joint Dovetail - A joint where the fingers are shaped like a doves tail, used to join pieces at 90 degrees.
Joint Expansion - A device used to permit a structure to expand or contract without breakage. In residential construction, a bituminous fiber strip used to separate blocks or units of concrete to prevent cracking due to expansion as a result of temperature changes. Also used on concrete slabs.
Joint Expansion Wall - A break or space in wall construction to allow for thermal expansion and contraction of materials.
Joint Keyed - - A joint in which one structural member is keyed or notched into an adjoining member as in timber construction.
- In masonry construction, a finished joint of mortar which has been tooled concave.
Joint Lap - In wallpapering, a joint made by trimming one selvedge and overlapping the other.
Joint Maker Square - Slightly smaller than a standard miter square, this square is especially helpful for furniture builders and model makers.
Joint Miter - The joint of two pieces at an angle that bisects the joining angle. For example, the miter joint at the side and head casing at a door opening is made at a 45° angle.
Joint Mitre - A joint formed by cutting two pieces of wood at 45-degree angles. Often found in trim work.
Joint Mortgage - A mortgage obtained by two people. Both are equally liable for the debt on the property.
Joint Ownership - Many properties are in the joint ownership of couples married or otherwise.
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.
Joint V - Tongue and groove boards with their top corners beveled so when the two boards come together a V is formed.
Joint Vee - Tongue and groove boards with their top corners beveled so when the two boards come together a V is formed.
Joint Wall Expansion - A break or space in wall construction to allow for thermal expansion and contraction of materials.
Jointing - The juncture of two separate plaster applications usually within a single surface plane, also called A Jointing.
Joints Break - To arrange joints so that they do not come directly under or over the joints of adjoining pieces, as in shingling, siding, and brick laying.
Joints Breaking - The manner of laying masonry units so as to avoid vertical joints in adjacent courses from lining up. Also the distribution of joints in boards, flooring, lath and panels so no two adjacent end-joints are directly in line.
Joints Breaking - The laying of bricks so that no two vertical joints come directly over one another, this is done for strength.
Joist - A beam supporting a floor or ceiling.
Joist Band - A wooden joist perpendicular to the direction of the joists in a floor framing system, closing off the floor platform at the outside face of the building.
Joist Bar - A truss like floor joist or rafter fabricated from steel bars.
Joist Hangers - Metal brackets that are used to connect joists to adjoining headers or support beams.
Joisted - To construct with joists.
Joisting - To construct with joists.
Joists - Any of the wood, steel, or concrete beams set parallel from wall to wall or across or abutting girders to support a floor or ceiling.
Judgement Lien - A lien or court-ordered monetary judgment against a current or previous property owner yet to be paid.
Juliet Balcony - A shallow balcony designed to provide a safety barrier in front of French Windows.
Jumper Bonding - - A reliable conductor to assure the required electrical conductivity between metal parts required to be electrically connected.
- At the main service, the connection between the grounded circuit conductor and the equipment grounding conductor.
- At equipment, the connection between two or more portions of the equipment grounding conductor.
- In a circuit, the connection between portions of a conductor in a circuit to maintain required ampacity of the circuit.
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.
Junction Box - An electrical box used for wire splicing.
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