SECTION 507 - RAILINGS
507.01 Description This work shall consist of furnishing all materials for, and
construction of, bridge rail, handrail, and barrier mounted bridge rail in accordance with these specifications and the lines and grades shown on the Plans.
507.02 Materials Materials shall meet the requirements of the following Sections of
Division 700 — Materials:
Steel Bridge Rail: Structural Steel 713.01 P r e f o r m e d P a d s 713.03 Aluminum Rail: Preformed Pads 713.03 A l u m i n u m R a i l i n g s 716.01 Pipe for Steel Pipe Hand Railing shall conform to the requirements of ASTM A53, Grade A or B.
507.03 Drawings The contractor shall prepare shop detail, erection, and other necessary
Working Drawings in accordance with the requirements of Section 105.7, Working Drawings.
507.04 General Anchor bolts or anchor bolt sleeves shall be set with a template and
shall be securely placed in their final position prior to the placement of the embedding concrete. Post anchor assemblies shall be installed to within 3/16 inch of the theoretical horizontal and vertical location. No field drilling will be allowed to install anchor bolts without approval of the Resident. Post bearing areas shall be dressed smooth and true to grade. Prior to post erection, each rail post location shall be finished to the theoretical elevation determined from profile grade, cross slope and curb height and will not be acceptable until it is within 3/16 inch of the theoretical elevation, as measured at the top of concrete. Preformed pads shall be used to adjust the rail posts for height and alignment. The number of preformed pads supplied shall be 10 percent more than the theoretical minimum number required. After erection of the railing, the Contractor shall clean the whole assembly, to present a neat and uniform appearance.
507.05 Steel Bridge Railing Steel railings shall be fabricated in accordance with the
requirements of Section 504, Structural Steel. When called for on the Plans, railings shall be galvanized and/or coated in accordance with Section 506, Shop Applied Protective Coating- Steel. Rail bars to be used on a radius of 1,000 feet, or less, shall be curved before the application of any galvanizing and/or coating. Bending tolerance from theoretical horizontal curvature shall be plus or minus ⅛ inch per yard, not to exceed ½ inch, total. 5-100
507.06 Steel Pipe Hand Railing Steel pipe hand railings shall be fabricated in
accordance with the requirements of Section 504, Structural Steel. When called for on the Plans, railings shall be galvanized and/or coated in accordance with Section 506, Shop Applied Protective Coating- Steel.
507.07 Aluminum Bridge Railing Aluminum sections may be sheared, sawed, or milled.
Cut edges shall be smooth and free of burrs. Holes for rivets shall be drilled full size from the solid or sub punched and reamed. Rivets shall be cold-driven in the "as-received" condition and the driven head shall be of the cone-point type. Welding shall be done in conformance with the latest edition of AWS Structural Welding Code-Aluminum D1.2 (AWS D1.2). No welding shall be performed before the approval of the appropriate weld procedures. No field welding is permitted. All welds shall be inspected and conform with AWS D1.2, Clause 5, Inspection. 100% of welds shall be visually examined (VT). In addition to VT, 10% of all partial joint penetration (PJP) and fillet welds shall be dye penetrant tested (PT); locations to be PT examined will be designated by the QAI. 25% of complete joint penetration (CJP) welds shall be either, ultrasonic tested (UT) or PT based on the thinner material in the welded joint; joints with thinner material thicknesses less than 0.25 inch shall be PT examined and joints with thinner material thickness equal or greater than 0.25 inch shall be UT examined. Locations to be UT examined will be designated by the QAI. Extent of testing shall conform with AWS D1.2, Clause 5. To facilitate bending, aluminum extrusions of Alloy 6061-T6 or 6351-T5 may be heated to a maximum temperature of 400 degrees Fahrenheit for a period of not more than thirty minutes. Threaded fasteners shall conform to the requirements of ANSI Standard B 1.1, Class 2A for external and Class 2B for internal threads.
507.08 Method of Measurement Railing will be measured as one lump sum unit,
fabricated, delivered, erected, and accepted.
507.09 Basis of Payment Railing will be paid for at the contract lump sum price,
complete in place. Payment for galvanizing and/or protective coating, when required, shall be included in the lump sum price. Payment will be made under: P a y I t e m P a y U n i t 507.0811 Steel Bridge Railing, 2 Bar L u m p S u m 507.0821 Steel Bridge Railing, 3 Bar L u m p S u m 5-101 507.0831 Steel Bridge Railing, 4 Bar L u m p S u m 507.0841 Steel Pipe Hand Railing L u m p S u m 507.0846 Barrier Mounted Steel Bridge Rail: 1 Bar Lump Sum 507.0848 Barrier Mounted Steel Bridge Rail: 2 Bar Lump Sum 507.0951 Aluminum Bridge Railing, Pedestrians L u m p S u m 507.0961 Aluminum Bridge Railing, Pedestrian, with Pales Lump Sum
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