| Permitting the passage of light.
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| see Transmittance.
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| The rction of airborne sound power that is caused by placing a barrier, wall or material, between the reverberant sound field of a source and its receiver; transmitted loss is a property of the barrier.
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| The ratio of light transmitted through a material to the total incident light falling on it; also called Transmission Factor or T.
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| The part of a door or window frame that separates the top of a door or window from the bottom of a transom light or sash.
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| A fastener applied to a transom sash and having a ring by which the latch bolt is retracted.
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| A short length of chain used to limit the opening of a transom sash, usually with a plate provided at each end for attachment.
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| A vertically operated device attached to a door frame and transom sash by which the transom sash may be opened or closed.
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| The framework of a glass window over a door or window; may be hinged for ventilation.
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| 1. A transverse piece in a structure, lintel. 2. A horizontal crossbar in a window, over a door, or between a door and a window or a fanlight above it. 3. A window above a door or other window built on and commonly hinged to a transom.
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| A mirror with a transparent coating that allows vision from the space on the darker side to the space on the more brightly lit side; from the brighter side, it reflects like a mirror; also called One-Way Glass.
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| A material that has transuded or seeped.
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| To pass through a membrane or permeable substance; to seep or exude.
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| A standard measurement of the relative flexural strength of gypsum board products conducted in accordance to ASTM C 473; expressed as pounds force or Newtons.
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| At right angles to the long direction of the member; crosswise; also referred to as lateral.
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| The vertical distance between the crown weir and the top dip of the trap.
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| In all traps it is necessary that a back vent connection be made to the drain or waste pipe on the sewer side of the trap; if the back vent is not provided, the trap could be emptied by siphonage.
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| see Float Trap.
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| see Grease Trap.
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| Located at a plumbing fixture waste line, designed to hold a quantity of water that provides a seal to prevent gasses in the sewer system from entering a room.
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| A door or hatch in a floor, ceiling, or roof.
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| A device either constructed on the inside of a building or structure or hung outside for the removal of waste materials from upper floors.
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| A device that compresses waste materials to conserve storage space.
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| The act or process of transporting or removing waste materials.
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| A tower crane mounted on tires, rails, or crawlers.
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| A device that draperies or curtains are hooked on so they can be opened or closed.
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| A floor constructed of richly patterned, marble-like limestone.
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| A richly patterned, marble-like form of limestone.
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| see Cable Tray.
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| see Grating Tread.
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