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Uncle Al's Home Improvements
"Helping Young Couples and Senior Citizens Maintain High Value In Their Homes"
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Glossary of Common Terms J K L M |
| Jamb |
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The top and side frames that form a door or window opening. |
| Joists |
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The horizontal framing members that support the floor and ceiling. |
| Joist Hanger |
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A metal, saddle like support used to join the joist to a ledger, beam, or rim joist so their top edges are flush. |
| Junction Box |
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An enclosure used for splicing circuits into different branches. Wires usually connect only to each other, not to a switch, receptacle, or fixture. |
| Kerf |
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The channel created by the blade of a saw as it cuts through a piece of material. |
| Knockouts |
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Pre-scored tabs that can be removed to make openings in a box. The openings accommodate cable and conduit connectors. |
| Lag Screw |
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A screw, usually 1/4 inch in diameter or larger with a hex head, that is used to secure dimensional lumber. It is tightened with an adjustable or socket wrench. |
| Lap Joint |
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The joint formed when one joist or stud overlaps another. |
| Lattice |
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A surface panel made of cris-crossed pieces of wood. |
| LB Fitting |
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Access elbow for conduit with provision for pulling wires around corners. |
| Leads |
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Short wires from fixtures and appliances used to connect to the power source. |
| Ledger |
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A horizontal joist used to provide support for the ends or edges of other members that join at a perpendicular angle. |
| Level |
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The condition that exists when a surface plane is at true horizontal; a tool used to determine true horizontal. |
| Linear Foot |
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Refers to the 'length only' dimension of a board or piece of molding. |
| Main Drain |
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The length of the drainage system between the fixture drains and the sewer drain. |
| Masonry Cement |
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A special mix of Portland cement and lime used for preparing mortar. The lime adds to the smooth workability of the mortar. |
| Miter Joint |
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The joint formed where two members that have been cut at the same angle meet, usually 45 degrees. |
| Molding |
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Wood, usually small-dimensioned and creativly shaped, used to cover exposed edges as a decoration. |
| Mortar |
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A mixture of masonry cement, masonry sand, and water. The usual proportion of cement to sand is 1 to 3. |
| Mortise |
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A shallow cutout in a board or jamb, usually used to recess hardware, such as hinges or locks. |
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