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Door Best Bookcase With Doors Elegant Bookcase With Doors White Greatest Picture A Bookcase Good Idea Open Than Inspirational Bookcase With Doors Ideas Combinations

Door Best Bookcase With Doors Elegant Bookcase With Doors White Greatest Picture A Bookcase Good Idea Open Than Inspirational Bookcase With Doors Ideas Combinations 33 Unique Bookcase with Doors
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Published at Wednesday, September 28th, 2016 - 20:45:13 PM. Door. By john.

Dutch door : A Dutch door (American English), stable door (British English), or half door (Hiberno English), is a door divided horizontally in such a fashion that the bottom half may remain shut while the top half opens. They were known in early New England as a double-hung door. The initial purpose of this door design was to keep animals out of farmhouses or to keep children inside while allowing light and air to filter through the open top; essentially combining a door with a fairly large window. When the top half was open they also allowed a breeze, but stopped the wind from blowing dirt into the house. This type of door was common in the Netherlands in the seventeenth century and appears in Dutch paintings of the period. They were also commonly found in the Dutch cultural areas of New York and New Jersey before the American Revolution. Dutch doors are often used in North-American passenger train cars to allow crewmen to interact safely with other employees not aboard their trains (or simply to visually inspect their own train) without risking falling from the train. Recent operating rules changes in Canada have rendered the Dutch-doors obsolete, although older rolling stock retains the doors. Similar doors were once commonplace in Irish houses, called half-doors (Irish: leathdoras or comhla bheag). According to The Irish Times, A traditional half-door is really a door and a half – a full door that opens inwards and a half door set to the front of the frame that opens outwards. They were designed to keep poultry and pigs from entering the house, as well as allowing air and sunlight into the usually dark and smoky cottages. The term is also applied to the modified rear doors on selected GMC Safaris and Chevrolet Astros that have a flip up rear window and two small half-size doors underneath.

Types of mechanism Door : Hinged doors Most doors are hinged along one side to allow the door to pivot away from the doorway in one direction, but not the other. The axis of rotation is usually vertical. In some cases, such as hinged garage doors, the axis may be horizontal, above the door opening. Doors can be hinged so that the axis of rotation is not in the plane of the door to reduce the space required on the side to which the door opens. This requires a mechanism so that the axis of rotation is on the side other than that in which the door opens. This is sometimes the case in trains or airplanes, such as for the door to the toilet, which opens inward. Most doors are hinged along one side to allow the door to pivot away from the doorway in one direction, but not the other. The axis of rotation is usually vertical. In some cases, such as hinged garage doors, the axis may be horizontal, above the door opening. Doors can be hinged so that the axis of rotation is not in the plane of the door to reduce the space required on the side to which the door opens. This requires a mechanism so that the axis of rotation is on the side other than that in which the door opens. This is sometimes the case in trains or airplanes, such as for the door to the toilet, which opens inward. Rotating doors A revolving door has several wings or leaves, generally four, radiating from a central shaft, forming compartments that rotate about a vertical axis. A revolving door allows people to pass in both directions without colliding, and forms an airlock maintaining a seal between inside and out. A pivot door, instead of hinges, is supported on a bearing some distance away from the edge, so that there is more or less of a gap on the pivot side as well as the opening side. In some cases the pivot is central, creating two equal openings. High-speed door A high-speed door is a very fast door some with opening speeds of up to 4 m/s, mainly used in the industrial sector where the speed of a door has an effect on production logistics, temperature and pressure control. high-speed clean room doors are used in pharmaceutical industries for the special curtain and stainless steel frames. They guarantee the tightness of all accesses. The powerful high-speed doors have a smooth surface structure and no protruding edges. Therefore, they can be easily cleaned and depositing of particles is largely excluded. High-speed doors are made to handle a high number of openings, generally more than 200,000 a year. They need to be built with heavy-duty parts and counterbalance systems for speed enhancement and emergency opening function. The door curtain was originally made of PVC, but was later also developed in aluminium and acrylic glass sections. High Speed refrigeration and cold room doors with excellent insulation values was also introduced with the Green and Energy saving requirements. In North America, the Door and Access Systems Manufacturing Association (DASMA) defines high-performance doors as non-residential, powered doors, characterized by rolling, folding, sliding or swinging action, that are either high-cycle (minimum 100 cycles/day) or high-speed (minimum 20 inches(508 mm)/second), and two out of three of the following: made-to-order for exact size and custom features, designed to be able to withstand equipment impact (break-away if accidentally hit by vehicle) or designed to sustain heavy usage with minimal maintenance. Automatic Door Automatically opening doors are powered open and closed either by electricity, spring, or both. There are several methods by which an automatically opening door is activated: A sensor detects traffic is approaching. Sensors for automatic doors are generally: A pressure sensor – e.g., a floor mat which reacts to the pressure of someone standing on it. An infrared curtain or beam which shines invisible light onto sensors; if someone or something blocks the beam the door is triggered open. A motion sensor which uses low-power microwave radar for the same effect. A remote sensor (e.g. based on infrared or radio waves) can be triggered by a portable remote control, or is installed inside a vehicle. These are popular for garage doors. A switch is operated manually, perhaps after security checks. This can be a push button switch or a swipe card. The act of pushing or pulling the door triggers the open and close cycle. These are also known as power-assisted doors. In addition to activation sensors automatically opening doors are generally fitted with safety sensors. These are usually an infrared curtain or beam, but can be a pressure mat fitted on the swing side of the door. The purpose of the safety sensor is to prevent the door from colliding with an object in its path by stopping or slowing its motion.A mechanism is set in modern automatic doors to ensure that door will be in open state in case of power failure. Others Up-and-over or overhead doors are often used in garages. Instead of hinges it has a mechanism, often counterbalanced or sprung, that allows it to be lifted so that it rests horizontally above the opening. A roller shutter or sectional overhead door is one variant of this type. A tambour door or roller door is an up-and-over door made of narrow horizontal slats and rolls up and down by sliding along vertical tracks and is typically found in entertainment centres and cabinets. Inward opening doors are doors that can only be opened (or forced open) from outside a building. Such doors pose a substantial fire risk to occupants of occupied buildings when they are locked. As such doors can only be forced open from the outside, building occupants would be prevented from escaping. In commercial and retail situations manufacturers have included in the design a mechanism that allows an inward opening door to be pushed open outwards in the event of an emergency (which is often a regulatory requirement). This is known as a breakaway feature. Pushing the door outward at its closed position, through a switch mechanism, disconnects power to the latch and allows the door to swing outward. Upon returning the door to the closed position, power is restored. Rebated doors, a term chiefly used in Britain, are double doors having a lip or overlap (i.e. a Rabbet) on the vertical edge(s) where they meet. Fire-rating can be achieved with an applied edge-guard or astragal molding on the meeting stile, in accordance with the American Fire door. Evolution Door is a trackless door that moves in the same closure level as a sliding door. The system is an invention of the Austrian artist Klemens Torggler. It is a further development of the Drehplattentür [de] that normally consists of two rotatable, connected panels which move to each other when opening.


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