461 METAL RAILING

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461.01 DESCRIPTION.
Furnish, fabricate, coat, and install metal or polyester coated steel railings.
461.02 MATERIALS.
Refer to Contract DocumentsThe written agreement executed between an Administration and the successful bidder, covering the performance of the work and furnishing of labor, equipment and materials, by which the Contractor is bound to perform the work and furnish the labor, equipment and materials, and by which the Administration is obligated to compensate him therefore at the mutually established and accepted rate or price. The Contract Documents shall include the Invitation for Bids, Notice to Contractors, Instructions to Bidders, Proposal, Contract Forms and Bonds, General Provisions, Specifications, Supplemental Specifications, all Special Provisions, all Technical Provisions, all Plans and Notices to Proceed, also any written Change Orders and Supplemental Agreements that are required to complete the construction of the work in an acceptable manner, including authorized extension thereof.
Square Structural Tubing for Rail Elements       909, A 500, Grade B, or A 618 or A 501
Steel Posts and Plates       909, A 36
Anchor bolts       909.08
Fusion Bonded Polyester Powder Coating       917.03, Color shall match Federal Standard 595, Color No. 20040 or as specified
Hot Dip Galvanized Zinc       A 123, A 153
Galvanizing Repair       465.03.05(c)
461.02.01 Structural Steel. Grind all welds of the railing system smooth, and remove all weld spatter. Ensure that all components are free of oil and any mill coating, burrs, pits, rust, or other foreign matter or surface blemishes.
Galvanize all structural steel including fasteners and anchor bolts. Oversize the treads of the nuts per A 325.
When specified, after fabrication and galvanizing, coat all structural steel for the railing with the polyester coating system per 465.03.01 and 465.03.02, except as noted.
Completely fabricate each component of the railing system including drilling of all holes prior to galvanizing and/or applying the polyester coating system.
461.02.02 Bolts, Nuts, and Washers. When specified, coat bolts, nuts, and washers with the polyester coating system. Tap the nuts with oversize threads in accordance with A 563. The coating manufacturer shall ensure that the polyester coated bolts, nuts, and washers fit together without damaging their respective coatings.
461.02.03 Anchor Bolts and Assemblies. When the polyester coating is specified, the coating manufacturer shall ensure that the polyester coated nuts and washers for attaching the bridge railing to the structure fit together without damaging their respective coatings. Do not polyester coat (only galvanize) portions of anchor bolts and assemblies to be embedded in concrete.
461.03 CONSTRUCTION.
Fabricate and install all railings as specified in the Contract DocumentsThe written agreement executed between an Administration and the successful bidder, covering the performance of the work and furnishing of labor, equipment and materials, by which the Contractor is bound to perform the work and furnish the labor, equipment and materials, and by which the Administration is obligated to compensate him therefore at the mutually established and accepted rate or price. The Contract Documents shall include the Invitation for Bids, Notice to Contractors, Instructions to Bidders, Proposal, Contract Forms and Bonds, General Provisions, Specifications, Supplemental Specifications, all Special Provisions, all Technical Provisions, all Plans and Notices to Proceed, also any written Change Orders and Supplemental Agreements that are required to complete the construction of the work in an acceptable manner, including authorized extension thereof to the horizontal and vertical alignment of the structure. Posts shall be normal to grade.
Furnish working drawings for approval.
461.03.01 Production, handling and Shipment. All components shall be wrapped to ensure safe arrival at the project site. Handle carefully metal railings and incidental parts and store them on blocking, racks, or platforms to elevate them at least 4 in. above the ground and surrounding surfaces. The material shall be protected from corrosion or damage, and shall be kept free from dirt, oil, grease, and other foreign matter. Wrapping shall remain until the component is to be incorporated into the work. Repair or replace damaged material as directed.
461.03.02 Anchor Bolts. Ensure that galvanized anchor bolt threads are free of all dirt, grease, oil, or other deleterious substances prior to roughening with a wire brush or other approved method prior to installation of the railing. Submit the proposed procedures prior to installation of the railing.
After the installation of the railing, touch up the exposed portions of the anchor bolt threads and any portions of the nuts, washers, or railing components per 465.03.05. Perform the work in accordance with the manufacturer’s recommendations. When the EngineerAny person designated by the Administrator or the procurement officer, acting directly or through his duly authorized representative, such representative acting within the scope of the particular duties assigned to him or of the authority given him. determines that a damaged area is beyond repair, remove, discard, and replace it at no additional cost.
461.04 MEASUREMENT AND PAYMENT.
The payment will be full compensation for all material, labor, equipment, tools and incidentals necessary to complete the work.
461.04.01 Metal Railing will be measured and paid for at the Contract unit price per linear foot.
461.04.02 Metal railing for which no specific item is included will not be measured but the cost will be incidental to other pertinent items.
461.04.02 Metal Railing will not be measured but will be paid for at the Contract lump sum price.
461.04.03 Metal railing for which no specific item is included will not be measured but the cost will be incidental to other pertinent items.
SPECIAL PROVISION INSERTS

The following Special Provision Inserts update Section 461 after the official publication of the Standard SpecificationA written description of functional characteristics, or the nature of a construction item to be procured. It may include a. Updated documents may be found within the Standard and Supplemental Specifications for Construction and Materials on the MDOTMaryland Department of Transportation SHA web page.

SPI-Section 461-Metal Railing. Dated 5/11/2018.