SERIES 4324
(24 gauge smooth ribbed white only)

SERIES 4420
(20 gauge smooth ribbed white only)

GADCO STEEL DOORS OFFER EXTRA QUALITY WITH THESE FEATURES:

• Full gauge steel, no nominal gauges used
• All galvanized box beam fully insulated stiles
• Corrosion resistant floor rails with full U-shaped bottom weather seal
• G-60 galvanized steel with two-coat finish (G-40 on series 4726)

SPECIFICATIONS

Part 1 General

1.01 Work Included - Sectional overhead doors shall be as supplied by GADCO and as shown on plans. Doors shall be constructed of 26, 24, or 20 gauge prefinished galvanized steel.

1.02 Related Work - Opening preparation, miscellaneous or structural metal work, access panels, field painting, field electrical wiring, etc. are in the Scope of Work of other divisions or trades.

Part 2 Product

2.01 Sections - Sections shall be rollformed of commercial quality galvanized cold-rolled steel. The exterior surface shall be rollformed with two (2) U-shaped deep ribs and three (3) small "pencil" ribs to provide strength and minimize surface imperfections. The horizontal meeting edges of each section shall be formed in ship-lap fashion. All stiles shall be formed of heavy galvanized steel. End stiles shall be box shaped and center stiles shall be hat shaped. All stiles shall be attached to the section with blind rivets at points of contact. Thickness of each section shall be 2" minimum. See GADCO hardware and insulation availability section for option details.

2.02 Track - 2" or 3" track shall be manufactured from heavy gauge galvanized steel. A wedge type closing action will be accomplished with adjustable vertical track. Vertical track shall be attached to jambs with 12 gauge adjustable brackets or continuous angle. Horizontal track shall be reinforced with heavy galvanized steel angle.

2.03 Hardware - Shall be heavy gauge galvanized steel. Rollers shall have a continuous steel rim, encasing 10 (ten) hardened 1/4" diameter steel ball bearings. All hinges, brackets and fixtures shall be attached securely to the stiles with 1/4" diameter thread forming screws. Pre-punched and extruded holes in the stiles shall allow 100% screw/thread engagement for superior holding power. Interior side lock standard, with keyed lock optional.

2.04 Finish - Prefinished section material shall be chemically cleaned before application of primer followed by a polyester coating on the face side, and a polyester coating on the inside.

2.05 Reinforcing Struts - Struts shall be supplied, one per section, on all ribbed steel doors over 12'2" wide up to and including doors 18'2" wide. Doors over 18'2" wide shall have one strut per section plus one additional strut per section, plus trusses applied on alternating struts. All ribbed steel doors over 15'2" wide shall have double end stiles, double roller hinges and long stem rollers.

2.06 Counterbalance - Counterbalance shall be oil tempered and helical wound torsion springs engineered to comply with industry standard 10,000 cycles, extended cycle life optional. (Reference ANSI/DASMA 102)

Part 3 Execution

3.01 Inspection - Inspect the surfaces that the door is to be attached to and assure that they are structurally sound and properly prepared to receive the door. Review all dimension sizes of the opening and the door to assure the specified design criteria has been met.

3.02 Installation - Install the doors in accordance with General American Door Company instructions and standards. Installation will be by authorized General American Door Company representatives.

GADCO LIMITED WARRANTY

General American Door Company (GADCO) warrants to the original purchaser that each commercial sectional door will be free from defects in material and workmanship for a period of one year following the date of purchase, excepting normal wear and tear, abuse, misuse or accident. Labor charges for replacement not included.

FOR COMPLETE DETAILS, CONSULT AUTHORIZED DEALER.