Section_12_48_23_Entrance_Floor_Grids.pdf

MAHG10-1032

Section 12 48 23_1-5

SECTION 12 48 23

ENTRANCE FLOOR GRIDS SPECIFICATIONS

PART 1 — GENERAL

1.01 RELATED DOCUMENTS

1. Drawings and general provisions of the Contract, including General Conditions, Supplementary Conditions and Division-1 General Requirements, apply to the work of this section.

1.02 WORK INCLUDED

A. Furnish and install Floor Grid System Insert.

1. Manufacturers:

a. Balco, Inc.

b. Or Equal

1.04 REFERENCES

A. Publications listed herein are part of this specification to the extent referenced. The criteria established in the specifications shall take precedence over the standards referenced herein.

(An example of a reference standard is given below.)

1. American Society for Testing and Materials (ASTM):

a. ASTM B221 – Standard Specification for Aluminum and Aluminum-Alloy Extruded

Bars, Rods, Wire, Shapes and Tubes.

1.05 SYSTEM DESCRIPTION

A. Floor Grid shall consist of a series of tread rails spaced 1 1/2" (38.1 mm) o.c. and running counter to the traffic flow.

1. Maximum allowable load on floor grid shall be 1000 psf uniform load and 300 lb. point load.

3. Floor Grid is removable and replaceable without disassembly of entire grid and without damage to grid.

4. Floor grids shall be provided with carpet inserts.

5. Floor Grids shall provide a uniform sightline.

Section 12 48 23_2-5

6. Floor grids shall allow debris to fall to sub-floor.

D. Floor grid tread bars shall be separately removable and replaceable without disassembly of all tread bars.

1.06 QUALITY ASSURANCE

A. Manufacturer: Obtain floor grid insert assemblies through one source from a single manufacturer.

1. Manufacturer shall be ISO 9001 Certified.

a. The Manufacturer shall have documented management and control of the processes that influence the quality of its products.

b. The Manufacturer shall have documented management and control of the processes that influence the quality of its customer service.

2. Manufacturer shall have a minimum of ten (10) years of experience in the fabrication of floor grid assemblies.

1.07 SUBMITTALS

A. Submit manufacturer’s specifications and technical data, including Material Safety Data

Sheets, installation instructions, as required, and catalog cuts and templates where required to explain construction and to provide for incorporation into the project.

B. Submit certificates, copies of independent test reports or research reports showing compliance with specified performance requirements.

C. Submit shop drawings showing layout and types of mats, grids and frames; full-scale sections of typical installations; anchors and accessories. Shop drawings submittal shall be coordinated with concrete work shop drawings showing oversized recess for deferred installation of frame.

1.08 DELIVERY, STORAGE AND HANDLING

A. Deliver floor grid system to jobsite in new, clean, unopened crates of sufficient size and strength to protect materials during transit.

B. Store components in original containers in a clean, dry location.

1.09 WARRANTY

A. Submit manufacturer’s warranty that materials furnished will perform as specified for a period

Section 12 48 23_3-5 of not less than two (2) years for floor grids for floor mats when installed in accordance with manufacturer’s recommendations.

PART 2 — PRODUCTS

2.01 ACCEPTABLE MANUFACTURERS

A. Furnish and install as noted in specifications and as indicated on drawings, Floor Grid Insert system as manufactured by: Balco, Inc., {P.O. Box 17249, 2626 S. Sheridan, Wichita, KS 67217; phone: 800-767-0082 or (316) 945-9328; fax: (316)

945-0789} or Equal.

2.02 MATERIALS

A. Floor Grid systems:

1. Tread rails: Aluminum, ASTM B221, alloy 6063-T5

2. “U” channels: Aluminum,. ASTM B221 6063-T5

3. Frames: Aluminum, ASTM B221, alloy 6063-T5

4. Angle Frames: Aluminum, ASTM B221, alloy 6063-T5

5. Locking Bars: Aluminum, ASTM B221, alloy 6063-T5.

B. Carpet shall be heavy-duty, 6975 Denier polypropylene text monofil yarn,

0.350 inch (8.9 mm) pile height with a double coat backing of polypropylene, heat set, 28 oz./sq. yd. min., 13 picks per inch.

C. Vinyl treads (inserts): Flexible P.V.C.

D. Fasteners, accessories and other materials indicated as provided by the manufacturer on the manufacturer’s details and in the manufacturer’s installation instructions and required for complete installation to manufacturer’s instructions.

2.03 FABRICATION

A. Fabricate floor grid assemblies as detailed.

1. Fabricate grid custom cut sections as required.

2. Fabricate floor grids as a series of grid tread bars spaced at 1-1/2 inches o.c.

3. Tread surfaces shall be continuous crosshatched vinyl or carpet.

4. Provide necessary and related parts, devices, anchors and other items required for proper installation.

B. Provide components in single size where possible; minimize site splicing.

1. Fabricate grid units to maximum size recommended by the manufacturer for units intended for removal and cleaning. Where joints in grid are necessary, space them

Section 12 48 23_4-5 symmetrically and away from normal traffic flow patterns.

2. Provide minimum number of pieces possible for frames that exceed maximum length.

Provide frames with hairline joints, equally spaced, complete with corner pin, splice plates and installation anchors.

3. Frame, aluminum pan and I-beams shall be shop fabricated as an assembled unit for installation in the field.

C. Shop assemble components and package with anchors and fittings.

2.04 FINISHES

A. Aluminum:

1. Tread rails, “U” channels: Mill finish, standard. Optional finish Clear Anodized.

C. Carpet: Specify color selected from standard colors available. Contracting Officer to make final selection.

D. P.V.C. Vinyl:

1. Leading edge frames and fillers shall be Black (standard).

2. Continuous Hinges shall be black.

3. Treads color shall be specified by Contracting Officer from standard colors available.

PART 3 — EXECUTION

3.01 EXAMINATION

A. Contractor shall verify that field measurements and recessed dimensions are as shown on shop drawings prior to releasing materials for fabrication by the manufacturer.

B. Installer shall examine conditions under which work is to be performed and shall notify the contractor in writing of unsatisfactory conditions. Installer shall not proceed until unsatisfactory conditions have been corrected in a manner acceptable to the installer.

3.02 INSTALLATION

A. Install floor grid system system in accordance with the governing regulations, the industry standards applicable to the work and the manufacturer’s written installation instructions.

B. Work shall be aligned plumb, level, and, where required, flush with adjacent surfaces.

C. Carpet and Vinyl shall be positively locked into tread rails.

Section 12 48 23_5-5

3.03 ADJUSTING AND PROTECTION

A. Inspect system components for proper fit. Adjust, repair or replace components not conforming to requirements. Repair or replacement of an individual unit shall be as approved by the Contracting Officer.

B. Advise the contractor of procedures required to protect the finished work from damage during the remainder of the construction period.

C. Finished units shall be without damage. Units damaged during shipping or construction shall be repaired by the contractor at the expense of the party damaging the material, in accordance with the contract requirements.

D. Protect installation from damage by work of other Sections. After installation of frame, install temporary filler of plywood in recesses and cover frames with plywood protective flooring.

Maintain protection until construction traffic has ended and project is near time of Substantial

Completion.

E. Install grids near time of Substantial Completion.

3.04 GENERAL RESPONSIBILITY

A. Any variation from this specification resulting in additional cost to any other contractor or subcontractor on this project shall be the sole financial responsibility of the contractor for the work of this section.

End of Section