Article 1 — Description
Replace elastomeric bridge bearings .
Article 2 — Materials
Furnish elastomeric bearings meeting the requirements of Item 434, “Bridge Bearings.” Fabricate new bearings to the indicated dimensions .
Article 3 — Construction
Raise spans as necessary to replace the indicated bearings in accordance with Item 495, “Raising Existing Structures.” Individual girders may be raised if approved and if no damage occurs to the slab or adjacent girders. Remove indicated bearings. Do not use flame- cutting techniques to remove bearing pads. Clean existing bearing seats and the bearing contact area on the bottoms of concrete girders by pressure washing, scraping, or other approved method to remove all wax residue and other deleterious materials. Use oil-free compressed air for final cleaning to remove all loose material from bearing contact areas. Repair spalls at bearing areas as indicated in accordance with Item 429, “Concrete Structure Repair.” Restore or reconstruct damaged bearing seats as necessary in accordance with Section 420.4.9, “Treatment and Finishing of Horizontal Surfaces.” If indicated, construct pedestals in conformance with the pertinent Items and the details shown on the plans. Place new bearing pads after all bearing seat or spall repair materials have attained a compressive strength of 3,000 psi. Do not use dry cement powder under the new bearings. Completely remove all hardware or appurtenances used to raise the spans or girders. Repair any damage resulting from the lifting operation at no expense to the Department.
Article 4 — Measurement
This Item will be measured by each bearing replaced.
Article 5 — Payment
The work performed and materials furnished in accordance with this Item and measured as provided under “Measurement” will be paid for at the unit price bid for “Replacing Elastomeric Bearing Pads.” This price is full compensation for raising the spans or girders, removing the original bearing pads, cleaning and restoring the bearing contact areas, furnishing and installing new bearing pads, equipment, labor, shoring, falsework, tools, and incidentals. The work performed to raise the spans or girders in accordance with Item 495 will not be paid for directly but will be subsidiary to this Item. Concrete spall repairs will be measured and paid for in accordance with Item 429. Pedestals will be paid for in accordance with Item 420, “Concrete Substructures,” or Item 442, “Metal for Structures,” as indicated.