Agenda - Council - 06/27/2017 - Laserfiche WebLink

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Al2 Tracer Wire for Non-conductive Pipe Tracer wire shall be installed along the length of all non-conductive mainline pipe, laterals, and services with vertical riser to the surface, at manholes, catch basins, stubs, laterals, services, and/or utility location boxes as required by the Special Provisions. Tracer wire shall be taped, clamped or affixed to the pipe in another manner as approved by the Engineer. Splicing tracer wire shall be by mechanical split bolt type or a crimp type compression fitting fully encased in approved electrical insulation putty. A twelve inch (12") tracer wire loop shall be provided on each side of a spliced connection. B Metal Sewer Castings Metal castings for sewer structures such as manhole frames and covers, catch basin frames, grates and curb boxes, shall conform to the requirements of ASTM A-48 (Gray Iron Castings), subject to the following supplementary provisions: (1) Casting assemblies or dimensions, details, weights, and class shall be as indicated in the detailed drawings for the design designation specified. Unless otherwise specified, the castings shall be Class 30 or better. (2) Lid -to -frame surfaces on round casting assemblies shall be machine milled to provide true bearing around the entire circumference. (3) Casting weight shall be not less than ninety five percent (95%) of theoretical weight for a unit cast to exact dimensions, based on four hundred forty two (442) pounds per cubic foot. (4) A Certificate of Compliance shall be furnished with each shipment of castings stating that the materials furnished have been tested and are in compliance with the specification requirements. (5) Unless otherwise specified, sanitary sewer manholes shall have self-sealing lids and concealed pick holes. C Precast Concrete Manhole and Catch Basin Sections Precast concrete riser sections and appurtenant units (grade rings, top and base slabs, special sections, etc.) used in the construction of manhole and catch basin structures shall conform with the requirements of ASTM C-478, MnDOT 2506 and the following supplementary provisions: (1) The precast sections and appurtenant units shall conform to all requirements as shown on the detailed drawings. (2) Joints of manhole riser sections shall be tongue and groove with rubber "0" ring or profile gaskets. (3) Sanitary sewer inlet and outlet pipes shall be joined to the manhole with a gasketed, flexible, watertight connection, watertight boot, or any watertight connection arrangement approved by the Engineer that allows differential settlement of the pipe and manhole wall to take place. Page 45