4.7. SR 08-19-2019 - Laserfiche WebLink

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SECTION 02705-MANHOLES&CATCH BASINS-ADJUST CASTING PART 1-- GENERAL 1.1 SUMMARY A. This section covers the furnishing of all labor, materials,tools,equipment and performances of all work and services necessary or incidental to adjusting a casting assembly frame and ring or valve box as indicated on the drawings or as specified herein. 1.2 METHOD OF MEASUREMENT AND PAYMENT A. Measurement and compensation for the following items shall be paid according to the referenced specification or as modified below: 1. Measurement and payment for adjusting existing manhole frame and rings,catch basin frame and rings,and valve boxes shall be paid per EACH scheduled adjustment, not caused by the Contractor's activities or delays. 2. The initial installation and adjustment of the casting assembly for new manholes and valve boxes, whether to match the bituminous base course or the bituminous wear course shall be incidental to the installation of the item. Subsequent adjustments, not caused by the Contractor's activities or delays, shall be paid per EACH of the type of item indicated. 3. Raise/Lower Existing Manhole B. Payment for raising or lowering an existing manhole shall be measured and paid based on the vertical difference between the existing and final rim elevations. The payment shall include all cost of labor, materials and equipment required to complete the work. C. The furnishing and installing of specific items and/or the performance of work under certain circumstances shall not be individually paid in the absence of a specific bid item for the work. The costs shall be included in the unit price bid for the associated adjustment items. Such items of work include but are not limited to: 1. Saw cutting the wall of the existing structure, if necessary. 2. Adjusting chimney seals on existing structures, if necessary. 1.3 SPECIFICATION REFERENCES A. MnDOT 2506 shall apply to adjusting frame and ring,except as modified herein. B. Unless noted otherwise,the provisions in this section are in addition to the referenced specification. PART 2-- PRODUCTS 2.1 ADJUSTING RINGS A. Only Ladtech H.D.P.E adjusting rings or approved equal,with approved mastic,shall be permitted for manholes. Only concrete adjusting rings shall be permitted for catch basins. PART 3-- EXECUTION 3.1 CONSTRUCTION REQUIREMENTS A. The Contractor shall bring manhole castings and valve boxes to grade. The manhole casting shall be placed on a full mortar bed or bituminous mastic upon final setting. The inside and outside of the adjusted area shall be plastered with a minimum thickness of 1/2-mortar. B. All inverts of manholes and valves boxes shall be cleaned of debris and gravel which may have fallen into the structures as a result of construction. City of Elk River-R13.119052 MANHOLES&CATCH BASINS-ADJUST CASTING August 2019 PAGE 02705-1 V021808©Bolton&Menk,Inc.2019,All Rights Reserved