City of Virginia Beach Pattern Book T
Tab – The exposed portion of strip shingles defined by cutouts. Tee – A T-shaped plumbing fitting.
Tempered – Strengthened. Tempered glass will not shatter nor create shards, but will form pellet-sized pieces when broken (like an automobile window. Required in tub and shower enclosures, entry door glass, sidelight glass, and in windows where the sill is situated less than 16 inches away from the floor.
Termites – Wood eating insects that resemble ants in size and general appearance. Termites can cause damage to wooden structures or the wood components within a structure.
Termite shield – A shield, usually of galvanized metal, placed in or on a foundation wall or around pipes to prevent the passage of termites.
Thermostat – A device that relegates the temperature of a room or building by switching heating or cooling equipment on or off.
Threshold – The bottom metal or wood plate of an exterior door frame. Generally they are adjustable to keep a tight fit with the door slab.
TJI (or TJ) – Manufactured structural building component resembling the letter "I." Used as floor joists and rafters. I-joists include two key
Pattern Book Appendices: Appendix B: Glossary: Construction Terms
parts: flanges and webs. The flange, or form, of the I-joist may be made of laminated veneer lumber or dimensional lumber, usually formed into a 1" width. The web or center of the I-joist is commonly made of plywood or oriented strand board (OSB). Large holes can be cut in the web to accommodate duct work and plumbing waste lines. I-joists are available in lengths up to 60'' long.
Toenailing – To drive a nail in at a slant. Method used to secure floor joists to the plate.
Tongue and groove – A joint made by a tongue (a rib on one edge of a board) that fits into a corresponding groove in the edge of another board. Used to make a tight flush joint. Typically, the subfloor plywood is tongue and groove.
Top chord – The upper or top member of a truss.
Top plate – Top horizontal member of a frame wall supporting ceiling joists, rafters, or other members.
Torch down roof – Also called single-ply or modified bitumen. A newer roofing material used primarily on flat roofs. This material usually comes in rolls and is applied to the roof with an open flame or torch.
Transmitter, garage door – The small, push button device that triggers the garage door to open or close.
Trap – A plumbing fitting that holds water to prevent air, gas, and vermin from backing up into a fixture.
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