Steel hinges are used in joinery and brass in furniture. The standard brass butt is shown in 255:1, with 255:1 A the section of the solid drawn type, and 255:lB the cheaper pressed or folded pattern. Plastic hinges are also available, suitable for light work. The width across the plates (leaves or flaps) is governed by the overall length, which is the listed size, and four ranges are usually available—narrow suite, broad suite, strong suite and extra-wide broad suite, with lengths rising in 1/4 in (6 mm) for 1 in (24 mm) to 2 in (50 mm) long, and in1/2 in (12 mm) increases after. Variations of this type of hinge are: lift-off butt (255:4) for doors which have to be removed from time to time without disturbing the setting; strap hinge (255:3) for narrow sections; loose pin hinge also known as ball-tipped hinge (255:5), where it is required to throw the door clear of the carcass frame with the whole of the hinge knuckle protruding. Figure 255:6 is the stopped hinge opening through 90° only for box lids, etc.; 255:2 is the back flap hinge with wide plates for table leaves and rebated or rabbeted fall flaps; 255:8 is the clock case hinge with one plate wider to allow for a projecting door (255:17), and 255:7 the piano hinge in continuous strip form for supporting long lengths, supplied in either drilled and countersunk or undrilled blanks. Figure 256:1 is the rule joint or table hinge with an extra wide plate to clear the hollow in a moulded rule joint, and with the knuckle on the reverse side to allow a full 90° drop (256:2).
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