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Door of 10 Downing Street, London, showing a transom separating the door from the window above. In architecture, a transom is a transverse horizontal structural beam or bar, or a crosspiece separating a door from a window above it. This contrasts with a mullion, a vertical structural member. [1] Transom or transom window is also the customary U ...
A Lev door or convection door is an internal floor-to-ceiling (full height) door, consisting of a standard door leaf and an upper leaf in place of the usual header wall. The leaves may or may not be separated by a transom. The doors enable effective convection of warm air.
Small shafts to doors and windows with caps and bases are called jamb-shafts; when in the inside arris of the jamb of a window, they are sometimes called scoinsons. [ 2 ] A doorjamb , door jamb , or sometimes doorpost is the vertical portion of the door frame onto which a door is secured. [ 3 ]
A transom window is a window above a door. In an exterior door the transom window is often fixed, in an interior door, it can open either by hinges at top or bottom, or rotate on hinges. It provided ventilation before forced air heating and cooling. A fan-shaped transom is known as a fanlight, especially in the British Isles.
Diagram of a revolving door, viewed from above. Around the central shaft of the revolving door, there are usually three or four panels called wings or leaves.Large diameter revolving doors can accommodate pushchairs and wheeled luggage racks - such large capacity doors are sometimes H-shaped to split the circle into only two (hence larger) parts.
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In modern construction, the shoji often do not form the exterior surface of the building; they sit inside a sliding glass door or window. [ 5 ] Shoji are valued for not setting a sharp barrier between the interior and the exterior; outside influences such as the swaying silhouettes of trees, or the chorus of frogs , can be appreciated from ...
The diagram above also shows a kicker lift, which is just 150 mm or so above the ground. Transom spacing is determined by the thickness of the boards supported, 38 mm boards require a transom spacing of no more than 1.2 m while a 50 mm board can stand a transom spacing of 2.6 m and 63 mm boards can have a maximum span of 3.25 m.
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