Section 124816 - Entrance Floor Grilles

Exclusively published and distributed by Architectural Computer Services, Inc. (ARCOM) for the AIAThis Product MasterSpec Section is licensed by ARCOM to Nystrom, Inc. ("Licensee").

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SECTION 124816 - ENTRANCE FLOOR GRILLES

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PART 1 - GENERAL

0.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section.

0.2 SUMMARY

A. Section includes recessed floor grilles and frames.

B. Related Requirements:

1. Section 124813 "Entrance Floor Mats and Frames" for flexible floor mats and frames.

0.3 COORDINATION

A. Coordinate size and location of recesses in concrete to receive floor grilles and frames.

0.4 ACTION SUBMITTALS

A. Product Data: For each type of product.

1. Include construction details, material descriptions, dimensions of individual components and profiles, and finishes for entrance floor grilles and frames.

B. Shop Drawings:

1. Items penetrating floor grilles and frames, including door control devices. 2. Divisions between grille sections. 3. Perimeter floor moldings.

C. Samples: For the following products, in manufacturer's standard sizes:

1. Floor Grille: Assembled section of floor grille. 2. Frame Members: Sample of each type and color.

0.5 CLOSEOUT SUBMITTALS

A. Maintenance Data: For floor grilles and frames to include in maintenance manuals.

0.6 FIELD CONDITIONS

A. Field Measurements: Indicate measurements on Shop Drawings.

PART 2 - PRODUCTS

0.1 MANUFACTURERS

A. Basis-of-Design Product: Subject to compliance with requirements, provide products by Nystrom, Inc. or comparable products by one of the following:

1. Babcock-Davis. 2. Balco, Inc. 3. C/S Group. 4. JL Industries, Inc.; a division of the Activar Construction Products Group. 5. Pawling Corporation.

0.2 ENTRANCE FLOOR GRILLES, GENERAL

A. Structural Performance: Provide floor grilles and frames capable of withstanding the following loads and stresses within limits and under conditions indicated:

1. Uniform floor load of [50,000 lb/sq. ft. (2394 kN/sq. m)] [80,000 lb/sq. ft. (3830 kN/sq. m)]. 2. Wheel load of [1000 lb (453 kg)] [1500 lb (680 kg)] per wheel.

B. Accessibility Standard: Comply with applicable provisions in [the DOJ's "2010 ADA Standards for Accessible Design"] [and] [ICC A117.1] .

0.3 FLOOR GRILLES

A. General: Provide manufacturer's standard floor-grille assemblies consisting of treads of type and profile indicated, interlocked or joined together by cross members, and with support legs (if any) and other components needed to produce a complete installation.

B. Rigid Floor Grille: Extruded aluminum tread rails 1.5 inches (38.1 mm) on center by 1-3/4 inches (44.5 mm) high, sitting on continuous vinyl cushions.

1. Basis-of-Design Product: Subject to compliance with requirements, provide Nystrom, Inc.; GRATEdesign® or comparable product by one of the following:

a. Babcock-Davis. b. Balco, Inc. c. Pawling Corporation. d. .

2. Tread Inserts:

a. Premium Carpet with 3700 denier, solution-dyed, woven nylon fibers; and shall include a minimum of 100, 10 mil monofilament fibers per inch. Each carpet fiber and monofilament shall be fusion-bonded to a rigid two-ply backing to prevent fraying and supplied in continuous spliced-free lengths. Fibers shall be treated with anti-stain and anti-static additives. b. Rugged Scrub: Crimped solution-dyed 600 denier polypropylene fibers tufted into a woven double backing and mechanically secured to tread rails. c. Brush: Brush made with rigid nylon bristles, 9 tufts per inch, each tuft containing 80 bristles. d. Vinyl: Ribbed-design-surface, resilient vinyl. e. Serrated Aluminum: Plain serrated aluminum treads.

f. Recycled Rubber: Ecotread recycled rubber with a SC of 90 manufactured with recycled rubber and EPDM backing. g. Ribbed Rubber: TPV, dual durameter rubber insert with convex and continuous serrations. h. Abrasive Insert: Mineral abrasive particles bonded to vinyl. i. Poured Abrasive: Serrated aluminum surface covered with aluminum-oxide or silicon-carbide grit in epoxy matrix.

3. Colors, Textures, and Patterns of Inserts: [As indicated by manufacturer's designations] [Match Architect's sample] [As selected by Architect from full range of industry colors]. 4. Rail Color: [Mill finish] [Clear] [Light bronze] [Medium bronze] [Dark bronze] [Black]. 5. Grill Size: [As indicated] .

C. Rigid Floor Grille: 100 percent Recycled, Nylon-reinforced buffed rubber tread strips alternating with aluminum divider bars assembled and galvanized steel wire, 1.5 inches (38.1 mm) on center by [0.6875 inches (17.5 mm)] [0.47 inches (11.9 mm)] high.

1. Basis-of-Design Product: Subject to compliance with requirements, provide Nystrom, Inc.; EnvIRONtread® II or comparable product by one of the following:

a. Babcock-Davis. b. Balco, Inc. c. .

2. Tread Inserts: 100 percent Recycled, Nylon-reinforced buffed rubber with minimum 59 percent post-consumer and 22 percent pre-consumer recycled content, mechanically secured to tread rails.

a. Model: Single tread insert, closed construction, [15/32 inch (24 mm)] [11/16 inch (17.5 mm)] overall depth. b. Model: Double tread insert, closed construction, [15/32 inch (24 mm)] [11/16 inch (17.5 mm)] overall depth. c. Model: Single tread insert, open construction, [15/32 inch (24 mm)] [11/16 inch (17.5 mm)] overall depth. d. Model: Double tread insert, open construction, [15/32 inch (24 mm)] [11/16 inch (17.5 mm)] overall depth. e. Tread Color: Grey or Black.

3. Colors, Textures, and Patterns of Inserts: [As indicated by manufacturer's designations] [Match Architect's sample] [As selected by Architect from full range of industry colors]. 4. Rail Color: [Mill finish] [Clear] [Light bronze] [Medium bronze] [Dark bronze] [Black].

D. Rigid Floor Grille: Extruded-aluminum tread rails, 0.6875 inch (17.5 mm) on center by 1 inch (25.4 mm) high.

1. Basis-of-Design Product: Subject to compliance with requirements, provide Nystrom, Inc.; alumaGRIL™ or comparable product by one of the following:

a. Babcock-Davis. b. Construction Specialties. c. Pawling Corporation. d. .

2. Rigid grille with rectangular tread.

a. Treads: T-shaped, 1/2 inch (12.7 mm) by 1/8 inch (3.2 mm) by 1 inch (25.4 mm). Spacing between treads not to exceed 3/16 inch (4.8 mm). Rail surface to be striated at 1/2 inch (12.7 mm) centers to create rectangular grid pattern. b. Rail Spacers: 1/2 inch (12.7 mm) aluminum tube. c. Grate Sections: Each section shall be no greater than 48 inches (1220 mm) by 48 inches (1220 mm). All sections to be supplied with individual, pre-fabricated, factory assembled frames.

3. Rigid grille with waffle tread.

a. Treads: T-shaped, 1/2 inch (12.7 mm) by 1/8 inch (3.2 mm) by 1 inch (25.4 mm). Spacing between treads not to exceed 3/16 inch (4.8 mm). Rail surface to be striated at 1/2 inch (12.7 mm) centers to create square grid pattern for multi- directional traffic. b. Rail Spacers: 1/2 inch (12.7 mm) aluminum tube. c. Grate Sections: Each section shall be no greater than 48 inches (1220 mm) by 48 inches (1220 mm). All sections to be supplied with individual, pre-fabricated, factory assembled frames.

4. Rigid grille with plank treads.

a. Treads: T-shaped, 1/2 inch (12.7 mm) by 1/8 inch (3.2 mm) by 1 inch (25.4 mm). Spacing between treads not to exceed 3/16 inch (4.8 mm). b. Rail Spacers: 1/2 inch (12.7 mm) aluminum tube. c. Grate Sections: Each section shall be no greater than 48 inches (1220 mm) by 48 inches (1220 mm). All sections to be supplied with individual, pre-fabricated, factory assembled frames.

E. Rigid Floor Grille: Stainless Steel tread wires spaced 0.233 inch (5.9 mm) on center by [1.125 inches (28.6 mm)] [0.625 inches (15.9 mm)] [0.375 inches (9.5 mm)] high. Surface wires: 0.093 inch (2.4 mm) by 0.156 inch (4 mm) wire 0.070 inch (1.8 mm) support bars spaced 1 inch (24 mm) on center. Tread wires shall be resistance welded at each joint.

1. Basis-of-Design Product: Subject to compliance with requirements, provide Nystrom, Inc.; eleGRIL® or comparable product by one of the following:

2. eleGRIL® rigid grille with 0.093 inch (2.4 mm) by 0.156 inch (4 mm) V wire.

3. eleGRIL® rigid grille with 0.093 inch (2.4 mm) by 0.156 inch (4 mm) V wire and premium carpet tread inserts. a. Carpet Fibers: 3700 denier solution-died woven nylon, and shall include a minimum of 100 10 mil monofilament fibers per square inch. Each carpet fiber shall be fusion-bonded to a rigid two-ply backing to prevent fraying and supplied in a continuous spliced-free lengths. Fibers shall be treated with anti-stain, anti- static, and anti-microbial additives. Carpet Weight: 33 oz /sq. yd. b. RuggedScrub® Carpet Tread: Crimped solution-dyed 600 denier polypropylene fibers tufted into a woven double backing and mechanically secured to tread rails. c. Color: As selected from manufacturer's full range of fourteen available colors.

F. Rigid Floor Grille: Stainless steel tread wires spaced 0.3275 inches (8.3 mm) on center by [1.125 inches (28.6 mm)] [0.75 inch (19.1 mm)] high. 0.140 inch (3.6 mm) by 0.375 inch (9.5 mm) profile wires mechanically interlocked with U-clip supports and spaced 0.187 inch (4.75 mm) apart.

1. Basis-of-Design Product: Subject to compliance with requirements, provide Nystrom, Inc.; proGRIL™ or comparable product by one of the following:

2. Stainless Steel Rigid Grill with 0.140 inch (3.6 mm) profile straight wire.

a. Treads: Straight Wire treads with [1-1/8 inch (28.6 mm)] [3/4 inch (19.1 mm)] deep support rails.

3. Stainless Steel Rigid Grill with 0.140 inch (3.6 mm) profile curved wire.

a. Treads: Curved Wire treads with [1-1/8 inch (28.6 mm)] [3/4 inch (19.1 mm)] deep support rails.

G. Lockdown: [Manufacturer's standard] [Hidden] [In view].

0.4 FRAMES

A. Provide manufacturer's standard frames of size and style for grille type, for permanent recessed installation in subfloor, complete with installation anchorages and accessories. Unless otherwise indicated, fabricate frame of same material and finish as grilles.

0.5 SUPPORT SYSTEM

A. Surface Mounted (SAM): Mechanically attached, aluminum frame.

B. Level Bed (LBM): Mechanically attached, [stainless steel] [or] [aluminum] frame.

C. Level Bed (LBC): Cast-in place, [stainless steel] [or] [aluminum] frame.

D. Deep Pit, Adjustable (DAM): Mechanically attached, stainless steel frame. Frame shall be adjustable from 3 in (76.2 mm) to 7 in (177.8 mm) deep with 1/8 in (3.2 mm) exposed surface.

E. Deep Pit (D2C, D3C, D4C): Cast-in-place, aluminum frame. Frame shall be [3 in (76.2 mm)] [4.5 in (114.3 mm)] [2 in (50.8 mm)] deep with 1/2 in (13 mm) exposed surface.

F. Level Bed Applications: Provide manufacturer's standard, vinyl cushion support system.

G. Drainage Pit Applications: Provide manufacturer's special deep-pit frame and support extrusion system with intermediate support beams, sized and spaced as recommended by manufacturer for indicated spans and equipped with vinyl support cushions.

0.6 DRAIN PANS

A. Provide manufacturer's standard[, 0.060-inch- (1.52-mm-) thick], [metallic-coated steel] [aluminum] [or] [stainless-steel] sheet drain pan with NPS 2 (DN 50) drain outlet for each floor-grille unit. Coat bottom of pan with protective coating recommended by manufacturer.

0.7 FABRICATION

A. Shop fabricate floor grilles to greatest extent possible in sizes as indicated. Unless otherwise indicated, provide each grille as a single unit; do not exceed manufacturer's recommended maximum sizes for units that are removed for maintenance and cleaning. Where joints in grilles are necessary, space symmetrically and away from normal traffic lanes.

B. Fabricate frame members in single lengths or, where frame dimensions exceed maximum available lengths, provide minimum number of pieces possible, with hairline joints equally spaced and pieces spliced together by straight connecting pins.

C. Coat surface of aluminum in contact with cementitious materials with manufacturer's standard protective coating.

0.8 ALUMINUM FINISHES

A. Mill finish.

B. Clear Anodic Finish: AAMA 611, [AA-M12C22A41, Class I, 0.018 mm] [AA-M12C22A31, Class II, 0.010 mm] or thicker.

0.9 STAINLESS-STEEL FINISHES

A. Surface Preparation: Remove tool and die marks and stretch lines, or blend into finish.

B. Polished Finishes: Grind and polish surfaces to produce uniform finish, free of cross scratches.

1. Run grain of directional finishes with long dimension of each piece. 2. When polishing is completed, passivate and rinse surfaces. Remove embedded foreign matter and leave surfaces chemically clean. 3. Directional Satin Finish: No. 4.

C. Mill finish.

PART 3 - EXECUTION

0.1 EXAMINATION

A. Examine substrates and floor conditions for compliance with requirements for location, size, minimum recess depth, and other conditions affecting installation of floor grilles and frames.

B. Examine roughing-in for drainage piping systems to verify actual locations of piping connections before floor grille and frame and drain pan installation.

C. Proceed with installation only after unsatisfactory conditions have been corrected.

0.2 INSTALLATION

A. Install recessed floor grilles and frames[ and drain pans] to comply with manufacturer's written instructions at locations indicated and with top of floor grilles and frames in relationship to one another and to adjoining finished flooring as recommended by manufacturer.

0.3 PROTECTION

A. After completing frame installations, provide temporary filler of plywood or fiberboard in floor- grille recesses and cover frames with plywood protective flooring. Maintain protection until construction traffic has ended and Project is near Substantial Completion.

END OF SECTION 124816

ENTRANCE FLOOR GRILLES 124816 - 9