8−77809.03.10 Transfer of Prestress. Transfer of prestress shall be accomplished in the presence of the Engineer and in accordance with the approved detensioning schedule and as soon as the transfer strength is achieved and verified. The detensioning schedule must consist of, but not be limited to, the following:
1.The order of detensioning, and;
2.Each strand must be detensioned at each end and/or between each element. At the end of each prestressed element the c oncrete surrounding the individual strands shall be chipped back to sound material to a depth of between 3/4-inch to 1 inch. The strands themselves shall be cut back to the same depth. The edges shall be squared off so as not to produce a "feathered" edge. Cleaning shall be by wire brushing or abrasive sand blasting to remove all dirt and residue that is not firmly bonded to the metal or concrete surfaces. The ensuing void, including the end of the strand, shall be filled with an approved non-shrink grout whose surface shall be finished flush with that of the plane surface of the product.
809.03.11 Handling. All products shall be removed from the forms in the presence of the
Engineer. Adequate notice shall be given to the Engineer so that he may witness the removal operation. Extreme care shall be exercised in handling and moving precast/prestressed concrete members. Precast girders and slabs shall be transported in an upright position and the points of support and direction of the reactions with respect to the member shall be approximately the same during transportation and storage as when the member is in its final position. The location of all dunnage and pick-up points shall be as indicated on the Shop Drawings. Care shall be taken during storage, hoisting and handling of the precast units to prevent cracking or damage. Damaged units shall be replaced or repaired at the Contractor's expense subject to approval by the Engineer. 809.03.12 Rejection of Units. Units not fabricated in accordance with the Contract Documents, Plans, or approved shop drawings will be subject to rejection by the Engineer. The Engineer will make a preliminary determination as to whether spalled, cracked, honeycombed, or otherwise defective concrete shall be repaired or be subject to rejection. In the event that the unit is to be repaired, the Contra ctor shall submit a detailed non-conformance report and a detailed repair procedure to the Engineer for approval prior to commencement of repair work. All repair work shall be performed at the expense of the Contractor and in the presence of the Engineer. Any repair work not done in the presence of the Engineer will not be accepted. The repaired unit will then be reinspected for approval by the Engineer.
809.04 METHOD OF MEASUREMENT. “ Precast, Prestressed Concrete Elements” will be
measured for the particular item or items of work as specified, and as directed by the Engineer.
809.04.1 Incidental Items. All labor, equipment, tools and materials, including but not limited to
backer rods, grouting between units, post tensioning, patching of duct pockets and all incidental items required to complete the work as specifi ed, complete, in place and accepted by the Engineer, 8−78 will not be measured separately for payment but will be considered incidental to the other items of work covered in this section.
809.05 BASIS OF PAYMENT. The accepted quantities of “Precast, Prestressed Concrete
Elements” of the sizes and types specified, will be paid for at their respective contract unit prices per item or items of work as listed in the proposal. The prices so stated shall constitute full and complete compensation for all labor, equipment, tools and materials, including but not limited to backer rods, grouting between units, post tensioning, patching of duct pockets and all incidentals necessary to finish the work as specified, complete and accepted by the Engineer.
a.Payment for Compensation for Out-of-State Inspection Services. The Contractor shall pay for such out-of-state inspection servic es by the day (per diem) for each Department Engineer and/or Technician assigned to the plant for inspection of the project. The rates, which shall be established based on the radius, in miles, from the base of operations, shall be as follows: Distance in Radial Miles Rates per Inspector/Day 51-to-100 miles $150.00 Greater than 100 miles $500.00 There will be a maximum charge of one inspector for precast operations and two inspectors for prestress operations. The Contractor will be credited 50 percent when a plant is performing operations for two or more Department contracts. The contractor will not be charged for an initial inspection of a company or a single follow-up inspection for plant approval prior to initial production. The compensation payment for out-of-state ins pection services will be paid as a progress payment deduction. SECTION 810 REINFORCING STEEL
810.01 DESCRIPTION. This work consists of providing reinforcing steel, both plain and deformed,
and uncoated and galvanized; spiral wire; and welded wire fabric of the quality, type, size and at the locations indicated on the Plans or as directed by the Engineer, all in accordance with these Specifications. This work also includes the drilling and grouting of reinforcing dowels.
810.02 MATERIALS. The following materials shall conform to the applicable requirements of the
indicated Subsections of PART M; MATERIALS:
a.Subsection M.05.01, Bar Reinforcement.
Source: Rhode Island Standard Specifications (Bluebook), 2024 Edition. Pages 411–412 of 826.