Sliding Door Entrances

All Columbia Sliding Door Entrances are UL in-plant inspected and labeled, certifying compliance with the ANSI A17.1, section 110, of the elevator and escalator safety code. In situations where extremely large openings are required, Columbia's label allows for 14'-wide x 10'- high openings in masonry walls, and 8'x8' openings in dry walls (sheet rock). If even larger openings are required, Columbia can custom-fabricate to any oversized specification and has the authority from UL to provide a UL Oversized Certificate , certifying that the frames are fabricated to UL's stringent manufacturing procedure. This certificate is also available for unlimited transom sizes. Other features include:

• The industry's only complete line of third-party-tested and in-plant inspected slide and smoke seal entrances

• The industry's only third-party-tested entrance assembly, certified to meet NFPA 105 for smoke seals, and Coast Guard-approved for the manufacture of shipboard elevator entrances

• The industry's only entrances designed for "single-person" fascia installation

• A wide selection of interlocking sill assemblies in aluminum, bronze and nickel-bronze

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General Specifications

Unit Frame: Manufactured of "Commercial Leveled Grade" carbon steel (#302 stainless steel or sheet bronze alloy #280 - Muntz) of 16 gauge minimum thickness. Frames are formed of one-piece metal comprising of integral trim and span fire rated shaft walls. Frames are provided with listed interface anchorage and UL labeled accordingly.

Door(s): Manufactured of "Commercial Leveled Grade" carbon steel of 18 gauge minimum thickness and are fabricated to enclose sound absorbing material of 1.25" minimum thickness. Doors are rated for 1-1/2 hour fire resistance and UL labeled accordingly and can be clad with stainless or bronze sheet when required.

Sill: Extrusion of quality aluminum (bronze or nickel-bronze) with a grooved slip resistant surface. Sills are provided with anchors to fasten to floor slab or optional sill support angles.

Header: Hanger/track supports are formed of zinc coated steel of 10 gauge minimum thickness extending the full travel of the door(s) and securely anchored to the unit frame, adjacent wall, or beam above.

Hanger Cover Plate: (when provided) fabricated of 16 gauge zinc coated steel extending the width of the opening or the full travel of the door(s).

Struts: (when provided) formed of zinc coated steel 10 gauge minimum thickness; or of structural angles, as required.

Fascia: Fabricated of 16 gauge minimum thickness zinc coated steel extending the full width of the opening- fastened to header and sill of floor above.

Toe Guard And Dust Cover: Similar to fascia material but beveled to 60-degree angle to fasten to wall below sill and above header.

Finish: All metal surfaces are thoroughly cleaned and treated to prevent corrosion. Enamel finishes are coated with EPA compliant primers and top coated with quality baking enamels cured to a 3-mil minimum thickness. Bronze materials are coated with a factory applied strippable lacquer for job site repair when necessary.

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