130461 — Metal Railing

461.01 Description

Furnish, fabricate, coat, and install metal or polyester coated steel railings.

461.02 Materials

Refer to Contract Documents. Square Structural Tubing for Rail Elements 909, A500, Grade B, or A618 or A501 Steel Posts and Plates 909, A36 Anchor bolts 909.08 Fusion Bonded Polyester Powder Coating 917.03, Color shall match AMS-STD - 595A, Color No. 20040 or as specified Hot Dip Galvanized Zinc A123, A153 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 threads of the nuts according to A563. When specified, after fabrication and galvanizing, coat all structural steel for the railing with the polyester coating system as specified in 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 according to A563. The coating manufacturer shall ensure that the polyester coated bolts, nuts, and washers fit together without damaging their respective coatings. 2025 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS

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 according to the Contract Documents 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 as specified in 465.03.05. Perform the work according to the manufacturer’s recommendations. When the Engineer 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 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. 2025 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS 462 — TIMBER STRUCTURES CATEGORY 400 STRUCTURES SECTION 462 — TIMBER STRUCTURES

462.01 Description

Construct structures or portions of structures using timber, including fabricating, erecting, treating, and coating of the timber elements. For timber piling refer to Section 410. For concrete refer to Section 420. For structural steel refer to Section 430.

462.02 Materials

Asphalt Cement Section 904 Structural Steel 909.01 Gray Iron Castings 909.04 Bolts and Hardware 909.10 Structural Timber 921.05 Preservative Treatments for Timber 921.06 Metal Timber Connectors According to manufacturer and as approved Galvanizing A153 Fire Stops and Galvanized Sheet Metal A653, Coating Designation G90

462.03 Construction

462.03.01 Storage and Handling. Store timber in open stacked piles at the site on suitable

blocking or platform at least 12 in. above any type of surface or vegetation in a manner to shed water and prevent warping. Protect it from weather by a suitable covering. Clear the storage site of weeds and rubbish before placing material and throughout the storage period. Ensure that the site selected is not subject to flooding. Handle using rope or nylon slings to prevent the breaking of outer fibers, bruising, or penetrating the surface.

462.03.02 Cutting and Boring. When practical, cut and bore treated timbers before pressure

treatment. Brush coat all cuts in treated timbers and all abrasions (after being carefully trimmed) with two applications of an approved wood preservative before installing the timber in the structure. When it is determined that treated timbers are damaged beyond repair, remove them from the project and replace them. 2025 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS