430—NBIS INSPECTION USING UNDER BRIDGEINSPECTION DEVICE

430.01 Description

This work shall consist of furnishing an OSHA compliant under bridge inspection device, including qualified operator, to facilitate the inspection of bridge structures by Department inspectors or designated consultant inspectors prior to opening such bridge structures or partial bridge structures, based on phase construction, to public traffic. The under bridge inspection device shall be of sufficient size, capacity, and reach to provide access to all areas of the specified bridge structure(s) or partial bridge structure(s) for inspection purposes. The Contractor shall provide VDOT inspectors full access to bridge structures for the National Bridge Inspection Standards (NBIS) bridge initial/inventory and/or final acceptance inspection before the bridge structure(s) or partial bridge structure(s) is opened to public traffic.

430.02 Notification Requirements

The Contractor shall notify the Engineer at least 1 month (30 days) in advance of his requested NBIS inspection date to arrange for NBIS inspection of the completed bridge structure(s) or completed partial bridge structures. If the Department is able to arrange to supply it’ s under bridge inspection device once the request for the NBIS inspection is received from the Contractor, the Contractor will be notified by the Engineer and payment for days/partial days not used will be deleted from the Contract. Advance notice and coordination by each party in scheduling mutually agreeable date(s) and time(s) for NBIS inspection is required due to bridge inspection device and personnel availability as well as associated costs.429.09 639430.03—Rescheduling Inspection If the NBIS bridge inspection must be rescheduled, the Contractor’ s request for the NBIS inspection will be subject to the next available date of the bridge inspection team within 10 calendar days of the originally scheduled date of the NBIS inspection. If either party must reschedule the inspection, they must furnish the other party at least 7 calendar days advance notice. The under bridge inspection device and qualified operator shall also be available for any subsequent re- inspection(s) (including mobilization) for corrective measures identified in the NBIS bridge inspection, and will be subject to the next available date the bridge inspection team can perform the inspection. If necessary, only the first re-inspection will be paid for in accordance with the pay item herein. Re-inspections thereafter shall be at the Contractor’ s expense. A delay in the NBIS bridge inspection attributable to the Contractor will not relieve the Contractor from his obligation to complete the work within the Contract time limit nor justify a time extension.

430.04 Traffic Control during Inspection

When the Contract has individual pay items to address maintenance of traffic operations, these items may be adjusted to accommodate traffic control necessary for the NBIS bridge initial/inventory and/ or final acceptance inspection(s). In contracts where maintenance of traffic is specified for Lump Sum payment, the Contractor shall plan the work so that the cost for maintenance of traffic for the NBIS bridge inspection(s) is covered in the final percentage of the lump sum payment. Therefore, the final percentage of the lump sum amount bid will not be submitted for payment until after the NBIS inspection(s) has been satisfactorily completed.

430.05 Measurement and Payment

NBIS access, under bridge (Str. No.) will be measured in days or partial days and will be paid for at the contract unit price per day or partial days based on the actual working time required to conduct inspections for the bridge structure(s) specified. This price shall include furnishing an un - der bridge inspection device and qualified operator, mobilization/demobilization, development of a traffic control plan and furnishing traffic control for the NBIS inspection(s) required to perform and fully complete the inspection(s). Time governing payment will commence once the under bridge inspection device and operator are at the inspection location based upon a mutually agreed schedule (date and time) between the Engineer and the Contractor and proper notification in accordance with the requirements herein has been made. Payment will be made under: —————————————————————————————Pay Item Pay Unit—————————————————————————————NBIS access, under bridge (Str. No.) Day/Partial Day—————————————————————————————430.05 640SECTION 431—EPOXY BRIDGE DECK OVERLAYS

431.01 Description

This work shall consist of preparing the deck surface and furnishing and applying epoxy as an overlay over concrete bridge decks in accordance with this Specification, and within the specified tolerances for the lines, grades and details shown on the plans.

431.02 Materials

431.03 Procedures

Personnel shall be thoroughly trained in the safe handling of materials in accordance with the manufac - turer’ s recommendations and the MSDS included with the materials. Epoxy shall be stored in accordance with Section 243. MSDS and other information pertaining to safe practices for storage, handling and disposal of the materials, and to their health hazards shall be obtained from the manufacturer and posted at storage areas. A copy of such information shall be provided to the Engineer. Prior to placing the first course, the entire deck surface shall be cleaned by shot-blasting and other means. The Contractor shall determine the bridge deck cleaning method by preparing and testing trial patches in accor - dance with VTM-92 to obtain the size of shot, flow of shot, forward speed of shot-blast machine, and number of passes necessary to provide a tensile rupture strength of the bond interface greater than or equal to 250 psi or a failure area, at a depth of 1/4 inch or more into the base concrete, greater than 50 percent of the test area. A test result shall be the average of three tests on a test patch of at least 1.5 feet by 3 feet consisting of two courses. One passing test result must be obtained for each span or 300 square yards, whichever is the smaller area. Test patches shall be placed in wheel paths, the area between wheel paths, or in other areas that represent a worst surface condition as determined by the Engineer. Test patches shall be installed with the same materials, equipment, personnel, timing, sequence of operations, and curing period prior to opening to traffic that will be used for the installation of the overlay. The cleaning method, materials, and installation procedure will be approved if one passing test result is obtained from each test area. If the cleaning method, materials, and installation procedure are not acceptable, the Contractor must remove the failed test patches and make the necessary adjustments, and then retest all test areas until test results are satisfactory at no additional cost to the Department. The cleaning method shall remove asphaltic material, oils, dirt, rubber, curing compounds, paint car - bonation, laitance, weak surface mortar and other potentially detrimental materials that may interfere with the bonding or curing of the overlay. Acceptable cleaning is usually recognized by a significant change in the color of the concrete and mortar, and the beginning exposure of coarse aggregate particles. Mortar that is sound and soundly bonded to the coarse aggregate must have open pores due to cleaning to be considered adequate for bond. Areas of asphalt larger than one inch in diameter, or smaller areas spaced less than six inches apart, shall be removed. Traffic paint lines shall be considered clean when the concrete has exposed aggregate showing through the paint stripe. Vacuum cleaning equipment shall be used to remove all dust and other loose material. Brooms shall not be used and will not be permitted.431.01