514Pedestrian and Bikeway Railing

Pedestrian and Bikeway Railing

Description

514.01This work consists of the construction of the designated type of railing per these

specifications and in conformity with the details, lines and grades shown on the plans or established.

Materials

514.02Pipe Railing. Pipe for railing shall be standard steel, black or galvanized as specified

The pipe, and galvanizing when specified, shall conform to the requirements of ASTM A53, Types E or S, Grade A, schedule 40 or better, for steel pipe. Threaded fittings shall be made from malleable iron, plain or galvanized, as specified, and slip-on fittings shall be of the type shown on the plans. Steel shapes shall conform to the requirements of Section 509.

514.03Steel Tube Railing. Steel for this type of railing shall conform to the requirements of

2.Steel plates and bars shall conform to the requirement of ASTM A709 Grade 36.

Steel for uncoated railing shall conform to the requirements of ASTM A847 for structural steel tubing and ASTM A709 Grade 50W for plates and shapes.

514.04Timber Railing. Timber for posts and rails shall be pressure treated and shall be per

Section 508. Timber for posts shall be Douglas Fir - Larch, #2 or equivalent. Timber for rails shall be Douglas Fir -Larch #1. Pressure treated timber shall conform to the requirements of the American Wood Preservers Association (AWPA) Standards, Section C1 and C2 (Soil Contact) Either Ammoniacal Copper Arsenate (ACA) or Chromated Copper Arsenate (CCA) preservative conforming to the requirements of Section P5 (Standards for Waterborne Preservatives of the AWPA Standards shall be utilized and total absorption shall be 0.4 pounds per cubic foot of timber. Redwood or cedar will not require a preservative treatment. All steel hardware and bolts for timber railing shall be galvanized or zinc coated.

514.05Combination Railing. Pedestrian or bikeway railing combined with traffic railing shall

conform to the requirements of this section. Traffic Railing and Traffic portion of Combination Railing shall conform to the plans and shall be per Section 606.

514.06

Construction Requirements

514.06Before construction of any type of railing, the Contractor shall submit working

drawings per Sections 101 and 105. Posts shall be aligned and plumb within a tolerance of 1/4 inch. The finished rail shall be rigidly braced and secured to surrounding construction and shall be tight, and free of rattle, vibration, or noticeable deflection. Rail elements shall be erected in a manner resulting in a smooth continuous installation. All bolts in the finished rail shall be drawn tight. Bolts shall be of sufficient length to extend beyond the nuts. Fasteners projecting toward the pathway shall be carriage bolts with smooth, round heads with nuts oriented away from the pathway. Bolts in timber rails shall be recessed. Handrails and rubrails shall not have projecting fasteners. Welding shall be per Section 509 and AWS D1.1. Gas Metal-Arc Welding (GMAC) will be permitted. Where welds are designated, connections shall be continuously welded. All cut edges shall be rounded and all welds ground smooth. Punched, cut, drilled, or tapped holes shall be free of burs and sharp edges. After field welding, damaged paint and galvanized coatings shall be repaired. Electrolytic isolation shall be provided to prevent contact of dissimilar metals. Asphaltic paint shall not be permitted to remain on surfaces to be exposed or to receive a sealant or paint. Pipe railing with threaded fittings shall screw into end fittings but may slide through intermediate fittings. Splices shall be made inside of fittings and clearance shall be allowed for expansion. Each piece of railing shall be securely fastened at one end by a setscrew in the fittings or by sufficient threads to develop its strength. All steel railing shall be galvanized or painted per Section 509 unless uncoated railing of corrosion resistant steel is specified. The color of paint shall be as shown on the plans or as directed. Method of Measurement

514.07Railing will be measured by the linear foot from end to end of the railing. Payment

will be full compensation for all work and materials required to complete the installation including foundations, anchorages, attachments, fabrication, painting, and installation.

Basis of Payment

514.08The accepted quantities of railing will be paid for at the contract unit price per

linear foot. Payment will be made under: Pay Item Pay Unit Bikeway Railing (____) Linear Foot Hand Railing Linear Foot Pedestrian Railing (____) Linear Foot Pipe Railing Linear Foot Pipe and Redwood Railing Linear Foot Payment for Traffic Railing, Combination Pedestrian and Traffic Railing, and Combination Railing shall be per Section 606 for the applicable type of bridge railing or guardrail.

515.01