These versatile barriers are dazzling in a variety of shapes, sizes and materials, but can often be classified as accordion, bi-fold or sliding bypass doors. Protocol and double-folder types make more convenient room partitions than more bulky sliding bypass doors [usually used as closet closures], but all three types can be used as room dividers.
The accordion door looks like an accordion bellows, usually made of pleated fabric or vinyl, overlaid on a light metal or plastic skeleton. Closing the door pleats stretches into a seemingly large partition; when the door is open, the pleats fold compactly to one side. The accordion door is suspended from the single overhead track on the roller and connected to the wall on one side. It is the easiest to install in the three types of track-mounted doors and requires little or no adjustment once in place.
The bi-fold doors are made of wood, plastic or sheet metal, up to about 2 feet wide, hinged longitudinally together, usually in pairs. Pairs of panels can be joined together to form a continuous surface. A double door composed of one or more pairs may be mounted on one side of the opening and closed by pulling it completely, or the door may be mounted on each side of the opening and folded together in the middle. The elevated track guides the bi-fold door, but the weight of the door lies on a pivot that is attached to the floor on the wall side. The pivot at the top of the door keeps the assembly upright.
Sliding bypass doors are usually made up of two large planks, each suspended by the wheels of the elevated track. The panels overlap approximately one inch and, when closed, remain vertically aligned by small floor-standing rails. All elevated rails - whether supported or purely guided - must be subjected to careful pressure when using the door and should be mounted on a horizontal, structurally supported surface.
Occasionally the track can be fixed directly to the ceiling. However, folding or sliding doors that are more than 6 feet 8 inches in height are rarely readily available, and since most ceilings are 8 feet high, installing such doors typically involves connecting the rails of the door to the header suspended from the joists, the structure of the support. Beam ceiling and floor top.
The position of the joists helps determine the position of the door. After finding the joist and marking the recommended position of the door, carefully calculate the vertical space required for the door and its track. The head is designed and constructed to fit the ceiling type to fit the space between the track and the ceiling.
To calculate the height of the header suspended from the permanently connected ceiling, measure from floor to ceiling along several points along the suggested door line. The height of the door and its track plus the thickness of the wallboard or other covering are applied to the bottom of the header from the shortest measurement of these measurements [thus allowing any unevenness in the floor or ceiling]. The result is the height of the title box; its length is the distance from the wall to the wall. Mount the header onto the ceiling joists, secure the rail to the header, and install the door on the rail.
For doors that hang directly from the ceiling, locate the joists and connect the rails directly to them through the ceiling material.
Orignal From: Remodeling - partition of the door
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