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Railroad
Grating
Duo-Grip
Specifications
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Product Specification Guide
How to Specify:This information is designed to conform to the requirements of the Three-Part Section Format of the CSI/CSC Master Format for construction specifications. These specifications are intended to be used as a guideline for architects and engineers as they establish the requirements for a particular project, and may be modified by them as deemed appropriate. PART 1: GENERAL
The contractor shall provide all labor, materials, equipment and incidentals as shown and specified and are required to furnish and install grating, stair treads and supports. 1.2 Quality Assurance A . Comply with applicable provisions and recommendations of the ANSI/NAAMM MBG 532 for Heavy Duty Metal Bar Grating Manual. B . The steel used in the Bearing Bars shall be of rectangular section and conform to ASTM A36, the steel used in the Reticuline Bars shall be of rectangular section and conform to ASTM A569. Rivets shall be 3/8 inch diameter steel in conformance with ASTM A575. C. No substitution of materials will be accepted unless they are submitted for review and the Architect/Engineer approves their use. 1.3 Submittals
PART 2: PRODUCT2.1 General
B. Bearing Bars: Material shall be steel as specified and are spaced at 2 5/16 inches face to face of bars. They shall be rectangular in shape and of an appropriate depth and thickness to carry the specified load. C. Reticuline Bars: Material shall be steel as specified, rectangular in shape, formed in a crimped pattern connecting to the bearing bars and riveted to them with 3/8" diameter rivets at 5" centers. D. Surface: The bearing bars shall have a smooth top surface unless the Architect/Engineer, determines that a serrated surface is required. E. Loading: The uniform load shall be designated by the Architect/Engineer, the deflection shall not exceed ¼ inch over the required span. When vehicular traffic is present the load may be specified in accordance with AASHTO standards for Highway Bridges. F. Finish: Manufacturers standard shop coat black or Galvanized as required by the Architect/Engineer. PART 3: EXECUTION3.1 Shop Fabrication
B. All cutouts to clear obstructions shall have a recommended clearance of 1 inch. When banding and toe plates are required they shall be welded to the grating in accordance with NAAMM standards. C. The finish coating, paint or galvanizing shall be applied after all of the required fabrication is complete 3.2 Installation A. The grating shall be received at the job site by the contractor, unloaded and protected from damage prior to the requirement for it to be installed. B. The installing contractor shall prepare the site for installation, determining that Deviations from the approved drawings are corrected prior to grating placement. C. Grating shall be installed in accordance with the approved shop drawings and the installation clearances called for in the NAAMM Heavy Duty Metal Bar Grating Manual including the use of the prescribed anchor system. |
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1.1 Scope of Work 
A. Grating shall be Amico Riv-Dexteel Bridge Deck Grating as manufactured by Alabama Metal Industries Corp. or approved equal. 
A. All required cutting, fitting and welding shall be performed in the manufacturers shop in accordance with the approved shop drawings and shall be in compliance with the NAAMM Heavy Duty Metal Bar Grating Manual tolerances and welding standards.