ARCHITECTURAL SPECIFICATIONS

780CD Commercial Sheet Door

Part 1 General

1.01 Work Included

The commercial door shall be 780CD Door Series as manufactured by Overhead Door Corporation.

1.02 Related Work

Opening preparation, miscellaneous or structural metal work, access and finish or field painting are in the Scope of Work of other divisions or trades.

1.03 Quality Assurance

In accordance with accepted quality assurance guidelines for motor-operated doors, the optional electric operator shall be manufactured by a single-source producer of door systems; as by Overhead Door Corporation.

Part 2 Product

2.01 Curtain

Curtain shall be roll-formed 26-gauge galvanized steel sections interlocked and seamed together to form a continuous curtain for full-door height in a profile that minimizes door nesting.  A flexible pvc strip shall be on each edge of the curtain's exterior side to prevent steel-to-steel contact, enhancing door operation and minimizing nesting and curtain scratching. Curtain shall be painted in one of the 14 standard colors. (Other colors available upon request.) Color warranty shall be a 20 year limited warranty on all standard colors.

2.02 Guide and Headplate Assembly

Guide shall be roll-formed from 18-gauge steel. Guides shall be 3" (76 mm) wide with abrasion resistant polypropylene strips on each edge of the guide. Through-hole universal design shall allow easy access from the front of the guide for fastener attachment to concrete, wood, steel or masonry jambs or for welding to steel jamb or steel embedded in concrete/masonry door jambs. Guides shall be pre-punched to accept quick-connect bottom bar stops.   Headplates shall be 11-gauge steel and designed for maximum strength to support the door shaft.

2.03 Bottom Bar and Bottom Bar Stops

Bottom bar shall be of extruded aluminum reinforced with steel roll-formed angle and provided with a flexible pvc bulb-type astragal to ensure a consistent seal along the floor.  Bottom bar stops shall be of quick-connect design that allow the curtain to be inserted into the universal guide, then locked into place with a single fastener. Bottom bar stops shall be 12-gauge galvanized steel.

2.04 Counterbalance Assembly

Counterbalance assembly shall include stepped designed steel rings to ensure a tight and uniform curtain wrap. Stepped, steel rings shall have a roller bearing to ensure smooth door operation and enhance door life. 10,000-cycle spring(s) shall be 3 3/8" (86 mm) diameter torsion springs. Shaft shall be 1 5/16" (33 mm) diameter to minimize door deflection, enhancing door shaft life and operation. Counterbalance assembly design shall allow quick assembly of non-handed chain hoist on either side of door at the job site.

2.05 Lock

Locks shall be slide bolt type locks mounted on each end of the door's bottom bar assembly locking into the door guide. Locks shall be fabricated of 0.180" thick steel.

2.06 Operation

Operation shall be by manual push up or by reduced drive chain hoist. Chain hoist shall be of non-handed design, to allow installation on either side of the counterbalance assembly. (Electric operation is available upon request.)

2.07 Packaging

The 780CD Series door shall be packaged individually in such a manner to minimize damage from shipping and handling of the door.

Part 3 Execution

3.01 Execution

The 780CD Series door shall be installed in accordance with Overhead Door Corporation instructions and standards without exception.

Note to specifier: This specification is a suggested guide. Available options are shown in parentheses.