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SECTION 06 60 00

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SECTION 06 60 00

    SECTION 06 60 00

    FRP GRATINGS

    Notes to Specifier: This section covers fiberglass reinforced polymer (FRP) gratings fastened to support steel with Hilti Powder Actuated X-FCM Grating Fastening System. Consult Hilti for assistance in editing this section for the specific application.

PART 1 GENERAL

1.01 SUMMARY

    A. Section Includes:

    1. Fiberglass reinforced polymer (FRP) gratings fastened to support steel with powder-

    actuated grating fastening system.

    B. Related Sections:

    1. Section 051200 - Structural Steel

1.02 REFERENCES

    A. ANSI A10.3 - Powder-Actuated Fastening Systems -- Safety Requirements.

    B. ASTM D635 - Standard Test Method for Rate of Burning and/or Extent and Time of

    Burning of Plastics in a Horizontal Position.

    C. ASTM E84 - Standard Test Method for Surface Burning Characteristics of Building

    Materials.

    D. ISO 9001 - Quality Management Systems - Requirements.

    E. ISO 14001 - Environmental Management Systems - Specification with Guidance for Use.

1.03 DESIGN REQUIREMENTS

    Notes to Specifier: Specify the uniform and concentrated loads. Consult manufacturer's catalogs for information regarding design requirements.

    A. Uniform Load Deflection: Deflection of gratings shall not exceed the smaller of 3/8 inch or

    L/120, under a uniform load of ________ psf.

    B. Concentrated Load Deflection: Deflection of gratings shall not exceed L/120, under a

    concentrated load of ________ pounds.

    C. Safety Factor: Maximum allowable loading of gratings shall be determined using a 2.5

    factor of safety.

    D. Stair Treads: Withstand uniform load of 100 psf or concentrated load of 300 pounds on an

    area of 4 square inches located in center of tread, whichever produces greater stress.

1.04 SUBMITTALS

    A. Comply with Section 013300 - Submittal Procedures.

    B. Product Data:

    1. Submit grating manufacturer's product data, including resin description, structural

    properties, load tables, and chemical resistance tables.

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    2. Submit fastener manufacturer's product data, including installation instructions.

    C. Shop Drawings: Submit grating manufacturer's shop drawings, indicating grating type,

    material, bar spacing and depth, top surface type, dimensions, tolerances, clearances,

    span, fabrication, supports, cutouts, stair treads, and location of fasteners.

D. Samples:

    1. Submit grating manufacturer's samples of gratings for each resin, color, size, top

    surface, and stair tread leading edge specified.

    2. Submit fastener manufacturer's samples of grating fasteners.

E. Test Reports: Submit grating manufacturer's ASTM E84 test reports.

F. Manufacturer's Certification:

    1. Submit grating manufacturer's certification indicating gratings comply with specified

    requirements and are suitable for intended application.

    2. Submit fastener manufacturer's certification indicating supplied grating fasteners

    comply with manufacturer’s published specifications.

    1.05 QUALITY ASSURANCE

    A. Grating Fastener Manufacturer: ISO 9001 and ISO 14001 certified company.

B. Grating Fasteners: Lloyd’s Registered and ABS Type Approved.

    C. Field Measurements: Take field measurements before preparation of shop drawings and

    fabrication, as necessary.

    1.06 DELIVERY, STORAGE, AND HANDLING

A. Delivery:

    1. Gratings: Deliver FRP gratings to site with labels on each panel clearly identifying

    manufacturer, material name, panel size, and location of installation.

    2. Fasteners: Deliver grating fasteners to site in manufacturer's original, unopened

    containers and packaging, with labels clearly identifying product name and

    manufacturer.

B. Storage:

    1. Gratings: Store FRP gratings flat, in clean, dry area, off ground in accordance with

    grating manufacturer's instructions. Protect grating edges from damage.

    2. Fasteners: Store grating fasteners in clean, dry area in accordance with fastener

    manufacturer's instructions.

    C. Handling: Protect materials and finish from damage during handling and installation.

    PART 2 PRODUCTS

    2.01 MANUFACTURERS

A. FRP Grating Manufacturers:

    1. Fibergrate.

    2. Strongwell.

    3. ____________________

    FRP GRATING 06610 - 2

    B. Grating Fastener Manufacturer:

    1. Hilti, Inc., PO Box 21148, Tulsa, Oklahoma 74121. Toll Free (800) 879-8000. Fax

    (800) 879-7000. Technical Support (800) 879-6000 x6337. Web Site

    www.us.hilti.com.

    2. Other manufacturers will not be allowed.

2.02 FRP PULTRUDED GRATINGS AND TREADS

    A. Fabrication:

    1. FRP gratings and treads shall be manufactured by pultrusion process.

    2. Finished Surfaces: Smooth, uniform, and resin-rich. Without dry spots, cracks,

    crazes, unreinforced areas, and visible glass fibers.

    3. Seal with resin cut and machined edges, holes, and abrasions.

    B. Resin System:

    Notes to Specifier: Specify resin and flame spread rating. Consult manufacturer's catalogs for information regarding resins, resin/color combinations, and flame spread ratings. Specify the resin for the FRP pultruded gratings based on the corrosion resistant properties required for the specific application.

    1. Resin: [Vinyl ester] [Isophthalic polyester] [Polyester].

    2. Fire retardant.

    3. Flame Spread Rating, ASTM E84: 25 or less.

    4. Self-Extinguishing: ASTM D635.

    5. Ultraviolet inhibitor for gratings exposed to weather.

    6. Color: [Yellow] [Gray] [ _______________ ].

    C. Bars:

    Notes to Specifier: Specify bar spacing and depth. The grating fastening system requires a minimum clear distance between bars of 3/4 inch and a maximum bearing bar spacing of 1-3/16 inches on center.

    The grating fastening system can accommodate a grating depth of 1 to 2 inches. Consult Hilti if a grating depth greater than 2 inches is required.

    1. Spacing: [1 inch by 6 inches on center] [ _____ inches by _____ inches on center]

    [As indicated on the drawings].

    2. Depth: [1 inch] [1-1/4 inches] [1-1/2 inches] [2 inches] [ _____ inches] [As

    indicated on the drawings].

    D. Top Surface: Non-skid grit affixed to surface by epoxy resin, followed by top coat of epoxy

    resin.

    E. Stair Treads:

    1. Grid:

    a. Spacing: [_____ inches by _____ inches on center] [As indicated on the

    drawings].

    b. Depth: [1-1/2 inches] [____ inches] [As indicated on the drawings].

    2. Tread Size: [9 inches by 36 inches] [____ inches by _____ inches] [As

    indicated on the drawings].

    3. Leading Edge: Solid, anti-slip nosing.

    4. Top Surface: Non-skid grit affixed to surface by epoxy resin, followed by top coat of

    epoxy resin.

2.03 FRP MOLDED GRATINGS AND TREADS

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    A. Fabrication:

    1. FRP gratings and treads shall be manufactured by open-mold process with 1-piece

    construction.

    2. Top Surface: Tops of bearing bars and cross bars in same plane.

    3. Finished Surfaces: Smooth, uniform, and resin-rich. Without dry spots, cracks,

    crazes, unreinforced areas, and visible glass fibers.

    4. Seal with resin cut and machined edges, holes, and abrasions.

    B. Resin System:

    Notes to Specifier: Specify resin and flame spread rating. Consult manufacturer's catalogs for information regarding resins, resin/color combinations, and flame spread ratings. Specify the resin for the FRP molded gratings based on the corrosion resistant properties required for the specific application.

    1. Resin: [Vinyl ester] [Polyester].

    2. Fire retardant.

    3. Flame Spread Rating, ASTM E84: [25] [ _____ ] or less.

    4. Ultraviolet inhibitor for gratings exposed to weather.

    5. Color: [Orange] [Green] [Yellow] [Dark Gray] [Light Gray] [_______________].

    C. Grid:

    Specifier Notes: Specify grid spacing and depth. The grating fastening system requires a minimum clear distance between bars of 3/4 inch and a maximum bearing bar spacing of 1-3/16 inches on center.

    The grating fastening system can accommodate a grating depth of 1 to 2 inches. Consult Hilti if a grating depth greater than 2 inches is required.

    1. Spacing: [1 inch by 4 inches on center] [ _____ inches by _____ inches on

    center] [As indicated on the drawings].

    2. Depth: [1 inch] [1-1/2 inches] [ _____ inches] [As indicated on the drawings].

    D. Top Surface: [Concave profile] [Coarse grit applied to concave profile by encapsulating

    grit with resin].

    E. Stair Treads:

    1. Grid:

    a. Spacing: [_____ inches by _____ inches on center] [As indicated on the

    drawings].

    b. Depth: [1-1/2 inches] [_____ inches] [As indicated on the drawings].

    2. Tread Size: [9 inches by 36 inches] [_____ inches by _____ inches] [As

    indicated on the drawings].

    3. Leading Edge: Solid, anti-slip nosing.

    4. Top Surface: Coarse grit applied to concave profile by encapsulating grit with resin.

2.04 GRATING FASTENERS

    Note to Specifier: There are a number of methods to secure FRP gratings to support steel. Only the Hilti Powder Actuated X-FCM Grating Fastening System is specified in this section. The X-FCM Grating Fastening System consists of two components: an 8 mm threaded stud (either X-CRM8 or X-BT M8) and the X-FCM Grating Disk. The X-CRM8 stud is SAE 316 equivalent for corrosive environment applications. The X-BT M8 is SAE 316 equivalent for corrosive environment applications where the threaded stud fastener point must not penetrate the support steel. The X-BT M8 is available with (SN12-R) and without (-R) an SAE 316 stainless steel washer with bonded black elastomeric sealing washer. Consult Hilti for

FRP GRATING 06610 - 4

more information regarding these grating fastening systems.

    A. Fasteners: Hilti Powder Actuated X-FCM Grating Fastening System.

    1. Grating Disks: Assembly of 52 mm diameter disk and 8 mm internally threaded

    screw.

    a. Carbon Steel: SAE 1008. Hot-dip zinc galvanized, ASTM A153 to a minimum

    of 65 micrometers thickness.

    b. Stainless Steel: SAE 316 or equivalent.

     2. Threaded Studs: 8 mm powder-actuated threaded studs fastened to support steel in

    field with Hilti powder-actuated fastening tool equipped with grating adapter that fits

    through gratings and contacts support steel.

    Note to Specifier: Specify threaded stud material. Specify Hilti X-CRM8 stainless steel threaded studs for hot-dip zinc galvanized carbon steel and stainless steel grating disks in corrosive environments. Specify Hilti X-BT M8 stainless steel threaded studs for hot-dip galvanized carbon steel and stainless steel grating disks in corrosive environments where threaded stud fastener point must not penetrate through support steel. Contact Hilti for more information on threaded studs.

    a. Stainless Steel: SAE 316 or equivalent with Rockwell Hardness of 47

    minimum.

PART 3 EXECUTION

3.01 EXAMINATION

    A. Examine support steel to receive FRP gratings for correct size, layout, and alignment.

    Notify Engineer if supports are not acceptable. Do not begin installation until unacceptable

    conditions have been corrected.

3.02 INSTALLATION - FRP GRATINGS

    A. Install FRP gratings in accordance with grating manufacturer's instructions at locations

    indicated on the drawings.

    B. Ensure support steel bearing surfaces are clean.

    C. Install gratings level, square, rigid, with flush installation, and without warp.

    D. Install gratings with cross bars in alignment.

    E. Trim panels to desired size and shape using cutting equipment in accordance with grating

    manufacturer's instructions.

    F. Coat cut and sanded surfaces with resin furnished by grating manufacturer in accordance

    with grating manufacturer's instructions.

    G. Support grating panels on all sides and attach to support steel with a minimum of two

    fasteners per full-size panel width.

    H. Cut openings for penetrations accurately to size and location.

    I. Cut openings for pipes a minimum of 2 inches larger in diameter than pipe.

    J. Replace defective or damaged gratings as directed by Engineer.

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3.03 INSTALLATION - GRATING FASTENERS

    A. Install grating fasteners to clamp grating to support steel in accordance with fastener

    manufacturer's instructions.

    B. Fasten threaded studs to support steel using fastening tools provided by fastener

    manufacturer.

    C. Operate powder-actuated fastening tools only with operators trained and qualified by

    fastener manufacturer's authorized instructor in accordance with ANSI A10.3.

    D. Drive threaded studs into support steel to proper embedment depth in accordance with

    fastener

     manufacturer's instructions.

    Note to Specifier: X-BT-RM8 threaded studs must be installed into pre-drilled holes (4 mm diameter by 3/16 inch deep) in the support steel. Contact Hilti for X-BT-RM8 installation instructions.

    E. Fasten threaded studs perpendicular to support steel.

    F. Use proper grating disk length to accommodate grating depth.

    G. Tighten internally threaded screw of grating disk onto threaded stud with maximum

    tightening torque depending on thickness of support steel in accordance with fastener

    manufacturer's instructions. Use tightening tool provided by fastener manufacturer.

    H. Install fasteners with a minimum thread engagement of 5 mm between grating disk

    internally threaded screw and threaded stud.

3.04 FIELD QUALITY CONTROL

    A. Fastener Manufacturer's Field Services: Fastener manufacturer's authorized instructor

    shall train and qualify operators for manufacturer's powder-actuated fastening tools in

    accordance with ANSI A10.3.

3.05 PROTECTION

    A. Protect installed FRP gratings and fasteners from damage during construction.

    END OF SECTION

FRP GRATING 06610 - 6

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