514.01 514-1 SECTION 514 PEDESTRIAN AND BIKEWAY RAILING DESCRIPTION
514.01 This 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
514.02 Pipe 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.
514.03 Steel Tube Railing . Steel for this type of railing shall conform to the requirements of
Section 509 and the following:
1.Steel tubes shall conform to the requirements of ASTM A500 Grade B.
2.Steel plates and bars shall conform to the requirement of ASTM A709 Grade 36.
3.Bolts shall conform to the requirements of ASTM A307.
4.Zinc coating shall conform to the requirements of ASTM A123, A153, A385 and A386.
5.Welding shall conform to the American Welding Society Structural Welding Code - Steel, D1.1. 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.
514.04 Timber 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, Sectio n 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 Waterbor ne 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.
514.05 Combination 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. 514.06 514-2 CONSTRUCTION REQUIREMENTS
514.06 Before 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 en d 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
514.07 Railing 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 instal lation. BASIS OF PAYMENT
514.08 The 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. 515.01 515-1 SECTION 515 WATERPROOFING MEMBRANE DESCRIPTION
515.01 This work consists of furnishing and placing an approved waterproofing membrane and
protective covering over a prepared concrete bridge deck surface or furnishing and placing an approved chemical concrete sealer (sealer) on the surface of a concrete bridge deck, approach slabs, and all adjacent sidewalk and curb, and other applications designated on the plans. MATERIALS
515.02 The waterproofing membrane shall consist of one of the following:
1.A prefabricated reinforced membrane and primer or,
2.A single component, hot -applied elastomeric membrane and primer if required. Materials for the waterproofing membrane shall meet the requirements specified in the following subsections: Protective Covering 705.07 Prefabricated, Reinforced Membrane and Primer 705.08 Single Component, Hot Applied, Elastomeric Membrane 705.09
515.03 Concrete sealer shall consist of an alkyl -alkoxy silane and shall be a penetrating type
with 40 percent solids in water or a high flash organic solvent. The sealer shall be compatible with the curing compound used on the concrete and shall be one that is included on the approved products list of the Department. A certificate of compliance shall be provided with each shipment of sealer. CONSTRUCTION REQUIREMENTS
515.04 Waterproofing Membrane.
a.Condition of Concrete Deck for Application of Waterproofing Membrane. The entire deck and the sides of the curbs for a height of 2 inches above the plan thickness of the hot mix asphalt shall be free of all foreign material such as dirt, grease, old pavement and primer. All decks shall be sand blasted or shot blasted. Immed iately before the application of primer or any type of membrane, all dust and loose material shall be removed. The deck condition will be approved before application of the membrane.
b.Weather and Moisture Limitations for Application of Waterproofing Membrane. Application of primer or membrane shall not be done during inclement weather conditions, or when deck and ambient air temperatures are below 50 °F . The deck surface shall be dry at the time of application of primer and membrane.
c.Application , Prefabricated, Reinforced Membrane. Primer shall be applied to the prepared concrete surface at the rate and according to the procedure recommended by the membrane manufacturer. Placement of the membrane shall not begin until the volatile material in the primer has dissipated. The membrane shall be placed in such a manner that a shingling effect will be achieved, and any accumulation of water will be directed toward curbs and drains. Primer and membrane shall be placed on the curb faces for a height of 2
Source: Colorado Standard Specifications for Road and Bridge Construction, 2023 Edition. Pages 523–524 of 943.