2.2 FABRICATION: A. General: Provide factory fabricated doors, designed to provide stability and uniform spacing of folds during operation. B. Track, Jamb Post, Lead Post, Jamb Channel and Hinges: Rust resistant steel not less than 1.2 mm (0.0478 inch) thick. 1. Provide zinccoated hinges. 2. Provide track with tread surface contoured for minimum friction. 3. Limit track deflection independent of structural supporting system to no more than 80 percent of bottom clearance. C. Trolley: Steel ball bearing type with nylon treads. D. Hardware: On each side of door, provide latching device and pull handles and keeper on door frame. 1. Provide manufacturer’s standard heavy duty, manually operated metal pulls and latches. 2. See Section 09 06 00, SCHEDULE FOR FINISHES for hardware finishes. 2.3 CONSTRUCTION: A. Support door frames at top, without floor guides. B. Provide units that are // recessed // // surface // mounted. C. Construct doors with collapsible and extendable hinge plates across top and bottom, and weld them to interconnecting vertical steel rods to provide smooth, positive operation so that all sections extend and collapse equally and simultaneously. D. Attach covers to frames with concealed fasteners that onsite removal and repair. PART 3 EXECUTION 3.1 SITE CONDITIONS: A. Verify field dimensions prior to fabrication. 3.2 INSTALLATION: A. : Secure track to underside of head of door frame with fasteners of size and type as recommended or specified by the door manufacturer. 1. Track is to be centered in door frame and be one (1) piece. B. Adjustment: Provide shims or other means as required to make doors fit openings. 1. Install doors so that strike edge member fits tight to jamb for full height of door. 2. Make necessary adjustments to assure that hardware functions as designed.
2.2 FABRICATION: A. General: Provide factory fabricated doors, designed to provide stability and uniform spacing of folds during operation. B. Track, Jamb Post, Lead Post, Jamb Channel and Hinges: Rust resistant steel not less than 1.2 mm (0.0478 inch) thick. 1. Provide zinccoated hinges. 2. Provide track with tread surface contoured for minimum friction. 3. Limit track deflection independent of structural supporting system to no more than 80 percent of bottom clearance. C. Trolley: Steel ball bearing type with nylon treads. D. Hardware: On each side of door, provide latching device and pull handles and keeper on door frame. 1. Provide manufacturer’s standard heavy duty, manually operated metal pulls and latches. 2. See Section 09 06 00, SCHEDULE FOR FINISHES for hardware finishes. 2.3 CONSTRUCTION: A. Support door frames at top, without floor guides. B. Provide units that are // recessed // // surface // mounted. C. Construct doors with collapsible and extendable hinge plates across top and bottom, and weld them to interconnecting vertical steel rods to provide smooth, positive operation so that all sections extend and collapse equally and simultaneously. D. Attach covers to frames with concealed fasteners that onsite removal and repair. PART 3 EXECUTION 3.1 SITE CONDITIONS: A. Verify field dimensions prior to fabrication. 3.2 INSTALLATION: A. : Secure track to underside of head of door frame with fasteners of size and type as recommended or specified by the door manufacturer. 1. Track is to be centered in door frame and be one (1) piece. B. Adjustment: Provide shims or other means as required to make doors fit openings. 1. Install doors so that strike edge member fits tight to jamb for full height of door. 2. Make necessary adjustments to assure that hardware functions as designed.
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