Heigh Hyaline Glazed Curtan Walls Grating

 
 
 
 
 
 
 
ENGINEERING SPECIFICATION
 
 MACHS® MOLDED GRATING
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
SECTION 06610
 
FIBERGLASS REINFORCED PLASTICS (FRP) FABRICATIONS
                                                     
MOLDED GRATING
   
PART 1 GENERAL
 
1.1 SCOPE OF WORK 
 
The CONTRACTOR shall furnish, fabricate (where necessary), and install all fiberglass reinforced plastic (FRP) items, with all appurtenances, accessories and        incidentals necessary to produce a complete, operable and serviceable installation as shown on the Contract Drawings and as specified herein, and in accordance with the requirements of the Contract Documents.
 
1.2 REFERENCES
 
The publications listed below (latest revision applicable) form a part of this specification to the extent referenced herein.  The publications are referred to within the text by the designation only.
 
AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) Test Methods:
 
ASTM D 635   Rate of Burning and/or Extent and Time of Burning of SelfSupporting Plastics in a Horizontal Position
 
ASTM E 84    Surface Burning Characteristics of Building Materials
 
 
1.3 CONTRACTOR SUBMITTALS
 
The CONTRACTOR shall furnish shop drawings of all fabricated gratings and accessories in accordance with the provisions of this Section.
 
The CONTRACTOR shall furnish manufacturer's shop drawings clearly showing material sizes, types, styles, part or catalog numbers, complete details for the fabrication and erection of components including, but not limited to, location, lengths, type and sizes of fasteners, clip angles, member sizes, and connection details.
 
The CONTRACTOR shall submit the manufacturer's published literature including structural design data, structural properties data, grating load/deflection tables, corrosion resistance tables, certificates of compliance, test reports as applicable, concrete anchor systems and their allowable load tables, and design calculations for systems not sized or designed in the contract documents.
 
The CONTRACTOR may be requested to submit sample pieces of each item specified herein for acceptance by the ENGINEER as to quality and color.  Sample pieces shall be manufactured by the method to be used in the WORK.
 
1.4 QUALITY ASSURANCE
 
All items to be provided under this Section shall be furnished only by manufacturers having a minimum of ten (10) years experience in the design and manufacture of similar products and systems. Additionally, if requested, a record of at least five (5) previous, separate, similar successful installations in the last five (5) years shall be provided.
 
Manufacturer shall offer a 3 year limited warranty on all FRP products against defects in materials and workmanship.
 
Manufacturer shall be certified to the ISO 9001-2000 standard. 
 
Manufacturer shall provide proof of certification from at least two other quality assurance programs for its facilities or products (UL, DNV, ABS, USCG, AARR).
 
1.5 PRODUCT DELIVERY AND STORAGE
 
Delivery of Materials: Manufactured materials shall be delivered in original, unbroken pallets, packages, containers, or bundles bearing the label of the manufacturer.  Adhesives, resins and their catalysts and hardeners shall be crated or boxed separately and noted as such to facilitate their movement to a dry indoor storage facility.
 
Storage of Products: All materials shall be carefully handled to prevent them from abrasion, cracking, chipping, twisting, other deformations, and other types of        damage.  Adhesives, resins and their catalysts are to be stored in dry indoor storage facilities between 70 and 85 degrees Fahrenheit (21 to 29 degrees Celsius) until they are required.
 
PART 2 PRODUCTS
 
2.1 MANUFACTURER
 
A.       Molded gratings shall be  Machs® as manufactured by
 
               Nantong Machs Composite Material Co.,Ltd.
 
 
2.2 GENERAL
 
All FRP items furnished under this Section shall be composed of fiberglass reinforcement and resin in qualities, quantities, properties, arrangements and     dimensions as necessary to meet the design requirements and dimensions as specified in the Contract Documents.
 
Fiberglass reinforcement shall be continuous roving in sufficient quantities as needed by the application and/or physical properties required.
 
Resin shall be {Vinyl Ester, Isophthalic Polyester, Polyester or Modified Acrylic - choose one}, with chemical formulations as necessary to provide the corrosion resistance, strength and other physical properties as required. 
 
All finished surfaces of FRP items and fabrications shall be smooth, resinrich, free of voids and without dry spots, cracks, crazes or unreinforced areas.  All glass fibers shall be well covered with resin to protect against their exposure due to wear or weathering.
 
All grating products shall have a tested flame spread rating of 25 or less per ASTM E84 Tunnel Test. Gratings shall also have tested burn time of less than 30 seconds and an extent of burn rate of less than or equal to 10 millimeters per ASTM D635. 
 
All mechanical grating clips shall be manufactured of Type 316SS (stainless steel).
 
 
2.3 MOLDED FRP GRATING
 
Manufacture: Grating shall be of a one piece molded construction with tops and bottoms of bearing bars and cross bars in the same plane.  Grating shall have (a square mesh pattern providing bidirectional strength or a rectangular mesh pattern providing unidirectional strength - choose one). Grating shall be reinforced with continuous rovings of equal number of layers in each direction.  The top layer of reinforcement shall be no more than 1/8" below the top surface of the grating so as to provide maximum stiffness and prevent resin chipping of unreinforced surfaces.  Percentage of glass (by weight) shall not exceed 35% so as to achieve maximum corrosion resistance, and as required to maintain the structural requirements of the CONTRACT.
 
After molding, no dry glass fibers shall be visible on any surface of bearing bars or cross bars.  All bars shall be smooth and uniform with no evidence of fiber orientation irregularities, interlaminar voids, porosity, resin rich or resin starved areas.
 
Non-slip surfacing: Grating shall be manufactured with a concave, meniscus profile on the top of each bar providing maximum slip resistance.
 
Grating bar intersections are to be filleted to a minimum radius of 1/16" to eliminate local stress concentrations and the possibility of resin cracking at these locations.
 
Fire rating: Grating shall be fire retardant with a tested flame spread rating of 25 or less when tested in accordance with ASTM E 84.  Data performed only on the resin shall not be acceptable.
 
Resin system: The resin system used in the manufacture of the grating shall be {Vi-Corr®, IFR, FGI, Corvex®, ELS, XFR or Super Vi-Corr - choose one}.  Manufacturer may be required to submit corrosion data from tests performed on actual grating products in standard chemical environments. Corrosion resistance data of the base resin from the manufacturer is not a true indicator of grating product corrosion resistance and shall not be accepted.  Vi-Corr® and IFR products shall be U.L. listed if available for the grid configuration specified.
 
Color:{varies by resin - consult your catalog}
 
G. Depth:             "  with a tolerance of plus or minus 1/16".
 
H. Mesh Configuration:           "  x            "  with a tolerance of plus or minus 1/16" mesh centerline to centerline
 
Load/Deflection:  Grating design loads shall be less than manufacturers published maximum recommended loads.  Maximum recommended loads shall be determined by acoustic emission testing.  Grating shall be designed for a uniform load of 100 psf or concentrated load of 300 lb.  Deflection is not to exceed 0.375" or L/D = 120, whichever is less. 
 
The manufacturer shall certify that the stiffness of all panels manufactured are never more than 2.5% below the published load-deflection values.
 
Substitutions:  Other products of equal strength, stiffness, corrosion resistance and overall quality may be submitted with the proper supporting data to the engineer for approval.
 
 
2.4 GRATING FABRICATION
 
Measurements: Grating supplied shall meet the dimensional requirements and tolerances as shown or specified.  The Contractor shall provide and/or verify measurements in field for work fabricated to fit field conditions as required by grating manufacturer to complete the work. When field dimensions are not required, contractor shall determine correct size and locations of required holes or cutouts from field dimensions before grating fabrication.
 
Layout: Each grating section shall be readily removable, except where indicated on drawings.  Manufacturer to provide openings and holes where located on the contract        drawings. Grating openings which fit around protrusions (pipes, cables, machinery, etc.) shall be discontinuous at approximately the centerline of opening so each section of grating is readily removable. 
 
Sealing: All shop fabricated grating cuts shall be coated with vinyl ester resin to provide maximum corrosion resistance.  All field fabricated grating cuts shall be        coated similarly by the contractor in accordance with the manufacturer's instructions.
 
Hardware: Type 316 stainless steel holddown clips shall be provided and spaced at maximum of four feet apart with a minimum of four per piece of grating, or as      recommended by the manufacturer.
 
PART 3 EXECUTION
 
3.1 INSPECTION
 
Shop inspection is authorized as required by the Owner and shall be at Owner's expense.  The fabricator shall give ample notice to Contractor prior to the beginning of any fabrication work so that inspection may be provided. The grating shall be as free, as commercially possible, from visual defects such as foreign inclusions, delamination, blisters, resin burns, air bubbles and pits.  The surface shall have a smooth finish (except for grit top surfaces).
 
3.2 INSTALLATION
 
Contractor shall install gratings in accordance with manufacturer's assembly drawings.  Fasten grating panels securely in place with holddown fasteners as specified herein.  Field cut and drill fiberglass reinforced plastic products with carbide or diamond tipped bits and blades.  Seal cut or drilled surfaces in accordance with manufacturer's instructions.  Follow manufacturer's instructions when cutting or drilling fiberglass products or using resin products; provide adequate ventilation.