640.1 General Description
This work includes furnishing and erecting retro-reflectorized railroad cross buck signs, including wood or steel posts and concrete bases for steel posts at locations shown on the Plans or as directed by the Engineer.
640.1.01 Definitions
General Provisions 101 through 150.
640.1.02 Related References
A. Standard Specifications Section 500—Concrete Structures B. Referenced Documents Specifications of the Association of American Railroads MUTCD
640.1.03 Submittals
General Provisions 101 through 150.
640.2 Materials
Use Class B or better concrete for steel posts that conforms to the dimensions and details shown on the plans and meets the requirements of Section 500. Ensure that the concrete surface is uniform and free of honeycomb. Ensure that other elements of the sign conform to the requirements of the specifications, or to the specifications of the Association of American Railroads, whichever is indicated on the plans.
640.2.01 Delivery, Storage, and Handling
General Provisions 101 through 150.
640.3 Construction Requirements
640.3.01 Personnel
General Provisions 101 through 150.
640.3.02 Equipment
General Provisions 101 through 150.
640.3.03 Preparation
General Provisions 101 through 150.
640.3.04 Fabrication
General Provisions 101 through 150.
640.3.05 Construction
A. Steel Post Place a steel post as follows: 1. Set each steel post for a sign assembly in a concrete foundation according to the plans. 2. Securely hold each post vertically until the concrete is strong enough to hold the post and sign without support. 3. Replace cracked bases. 4. Backfill around the bases with satisfactory materials. 5. Carefully tamp the backfill in place. After setting the steel post, curing the concrete, and backfilling, fasten the cross buck sign to the post according to the details shown in the plans. B. Wood Post Place a wood post as follows: 1. Place each post in a prepared dry hole at least 6 in. (150 mm) diameter. 2. Backfill the hole with a mixture of Portland cement and damp clean friable soil using 8 percent cement by volume. 3. Thoroughly tamp the resultant mixture in place around the post. 4. Erect the posts vertically to the depth and at an angle to the roadway as shown on the plans or directed by the engineer. The post shall penetrate the ground at least 4 ft. (1.2 m).
640.3.06 Quality Acceptance
General Provisions 101 through 150.
640.3.07 Contractor Quality and Maintenance
General Provisions 101 through 150.
640.4 Measurement
Retro-reflectorized railroad cross buck signs are measured for payment by the number in place completed and accepted.
640.4.01 Limits
General Provisions 101 through 150.
640.5 Payment
Cross buck signs measured for payment will be paid for per each. Payment is full compensation for furnishing and erecting the Item complete in place according to the plans and specifications, and for providing materials and concrete, excavating, backfilling, and disposing of the surplus materials. Payment will be made under: Item No. 640 Retro-reflectorized railroad cross buck signs, steel post Per each Item No. 640 Retro-reflectorized railroad cross buck signs, wood post Per each
640.5.01 Adjustments
General Provisions 101 through 150.
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