Overhead Doors. Overhead doors are available in all sizes. They are most commonly made of wood and steel although aluminum and stainless steel are sometimes used. The overhead doors are first designated by the type of operation of the door: rolling, sectional, canopy, and others. The estimator must determine the size of door, size of opening, type and style of door finishes required, door hanger type, installation details, and whether it is hand, electric, or chain operated. The overhead door is priced as a unit with all required hardware. Often the supplier will act as a subcontractor and install the doors.
Miscellaneous Doors. The wide varieties of specialized doors are each designed to fill a particular need. Among these are rolling grilles, which roll horizontally or vertically to provide protection or control traffic. Other specialty doors are revolving, dumbwaiter, rubber shock-absorbing doors, cooler and freezer doors as well as blast-and bulletproof doors. The estimating procedures are basically the same, regardless of the type of door required.
Folding Doors and Partitions. Folding (accordion) doors and partitions offer the advantage of increased flexibility and more efficient use of the floor space in a building. They are available in fiberglass, vinyl, and wood, or in combinations of these materials. They can be made to form a radius, and have concealed pockets and overhead track; a variety of hardware is also available. Depending on the type of construction, the maximum opening height ranges from 8 to 21 feet and the width from 8to 30 feet. The doors may be of steel construction with a covering, rigid fiberboard panels, laminated wood, or solid wood panels. Specially constructed dividers are also available with higher sound-control ratings. The exact type required will be found in the specifications, as will the hardware requirements. Both the specifications and drawings must be checked for installation details and the opening sizes required
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Miscellaneous Doors. The wide varieties of specialized doors are each designed to fill a particular need. Among these are rolling grilles, which roll horizontally or vertically to provide protection or control traffic. Other specialty doors are revolving, dumbwaiter, rubber shock-absorbing doors, cooler and freezer doors as well as blast-and bulletproof doors. The estimating procedures are basically the same, regardless of the type of door required.
Folding Doors and Partitions. Folding (accordion) doors and partitions offer the advantage of increased flexibility and more efficient use of the floor space in a building. They are available in fiberglass, vinyl, and wood, or in combinations of these materials. They can be made to form a radius, and have concealed pockets and overhead track; a variety of hardware is also available. Depending on the type of construction, the maximum opening height ranges from 8 to 21 feet and the width from 8to 30 feet. The doors may be of steel construction with a covering, rigid fiberboard panels, laminated wood, or solid wood panels. Specially constructed dividers are also available with higher sound-control ratings. The exact type required will be found in the specifications, as will the hardware requirements. Both the specifications and drawings must be checked for installation details and the opening sizes required
不要用翻译软件弄，那个不对，希望专业人事帮我翻译,我的QQ是286048666,希望能与我联系!!
