516Aluminum Handrail

516.1 General Description

This work consists of placing handrail and posts made of cast, rolled, or extruded aluminum or of combinations of these materials. It also includes setting anchorages and preparing bearing areas.

516.1.01 Definitions

General Provisions 101 through 150.

516.1.02 Related References

A. Standard Specifications Section 500—Concrete Structures B. Referenced Documents General Provisions 101 through 150.

516.1.03 Submittals

General Provisions 101 through 150.

516.2 Materials

All cast posts for any one structure shall be produced by the same manufacturer. All materials shall meet the requirements of the following specifications: Material Section Aluminum Alloy Sheet and Plate 850.2.01 Aluminum Alloy Bars, Rods, Shapes, and Wire 850.2.02 Aluminum Alloy Bolts, Nuts, and Set Screws 850.2.03 Aluminum Alloy Washers 850.2.04 Aluminum Alloy Rivets 850.2.05 Aluminum Alloy Shims 850.2.06 Cast Aluminum Alloy Railing Post 854.2.02 Aluminum Alloy Sand Mold Castings 854.2.03 Aluminum Alloy Extruded Tubing 850.2.07 Aluminum Alloy Pipe 850.2.08 Aluminum Impregnated Caulking Compound 870.2.05. A.3 Neoprene Pads 885.2.01 Steel Bolts, Nuts, and Washers 852.2.01 Plain Steel Bars—Threaded Ends 852.2.02 Galvanizing 852.2.01. B

516.2.01 Delivery, Storage, and Handling

General Provisions 101 through 150.

516.3 Construction Requirements

516.3.01 Personnel

General Provisions 101 through 150.

516.3.02 Equipment

General Provisions 101 through 150.

516.3.03 Preparation

General Provisions 101 through 150.

516.3.04 Fabrication

A. Fabricate Handrail Fabricate handrail as follows: 1. Fabrication Material Fabricate handrail from plates, shapes, bars, pipe, castings, or from combinations of these materials as shown on the plan details. 2. Handrail Not Supported on Concrete Parapets When erected bridge handrail will not be supported on a concrete parapet, fabricate the handrail so posts will be plumb.

516.3.05 Construction

A. Construct and Erect Handrail Construct and erect handrail according to the plan details and as follows: 1. Set Anchor Bolts Set anchor bolts as follows: a. Set the anchor bolts according to the plan details and ensure that the bolts have the correct spacing and projection. Projections shown on the plans are for flat grades and assume no use of shims. b. On other grades or where shims are needed, modify the projection shown on the plans so that after all shims, pads, posts, and washers have been placed, the anchor bolt nut can be screwed completely onto the anchor bolt. c. If the projection is too short, lengthen or replace the bolt (at the Contractor’s expense) as directed by the Engineer. 2. Prepare Bearing Areas Before placing the posts, prepare bearing areas as follows to obtain full contact between the posts or shims or pads and the concrete: a. Remove all concrete protrusions. b. Fill all depressions. c. Ensure that bearing areas for posts are true to grade. d. Finish concrete with the Type IV—Floated Surface Finish specified in Section 500.3.05. AB.5, Type IV—Floated Surface Finish. 3. Protect Contact Surfaces Where aluminum alloys contact other materials, protect the contact surfaces as detailed on the plans or as follows: a. Contact with Other Metals or Wood. Separate the contact surfaces with neoprene pads. Do not place aluminum alloys in direct contact with copper, copper base alloys, lead, nickel, iron, steel, or wood. b. Contact with Concrete, Stone, or Masonry. Separate the contact surfaces with neoprene pads. 4. Erect Handrail Erect handrail as follows: a. If the finish on rails or posts is damaged in handling, either repair it to the satisfaction of the Engineer or replace it (both at the Contractor’s expense). b. Make all rails parallel to grade. c. Where bridge rail will be supported on a concrete parapet, set handrail posts normal to grade. d. Set other handrail posts plumb. If necessary, use aluminum alloy shims under post bases to achieve plumb posts. e. Tighten the anchor bolt nuts to a snug fit with full bearing on the base of the post. f. When posts and rails are completely bolted into place, ensure that they are true to line and grade.

516.3.06 Quality Acceptance

General Provisions 101 through 150.

516.3.07 Contractor Warranty and Maintenance

General Provisions 101 through 150.

516.4 Measurement

This work will be measured for payment in linear feet (meters) of accepted handrail. Handrail will be measured along the top rail from out-to-out of ends of aluminum rail or from out-to-out of aluminum end posts, whichever is greater. No deductions will be made for openings at deck expansion joints or at light standards.

516.4.01 Limits

General Provisions 101 through 150.

516.5 Payment

This work will be paid for at the Contract Price per linear foot (meter) for aluminum handrail complete in place. Payment will be made under: Item No. 516 Aluminum Handrail, (Type) Per linear foot (meter)

516.5.01 Adjustments

General Provisions 101 through 150.