8-37 Reconstruct Manhole Structure s will be measured and paid in u nits of each for manhole
structure s satisfactorily reconstructed. Payment will not be made for both an adjustment and reconstruction. Adjustment of Oversized Manholes will be measured and paid in units of each for oversized manholes satisfactorily adjuste d and accepted . Manholes with a frame and cover diameter greater than 30 inches and/or frame height greater than 12 inches shall be considered as oversized . Where any catch basin, drop inlet, manhole, meter box or valve box is adjusted more than once because of milling operations, each adjustment will be measured and paid . Where a catch basin, drop inlet, meter box or valve box is raised more than 2 f eet, the number of linear feet exceeding 2 f eet that such structure has been raised will be measured and paid per linear foot as provided in Article 840- 4 for Masonry Drainage Structure . Measurement will be made by subtracting the elevation at the highest point of the original structure from the eleva tion at the highest point of the adjusted structure and then subtracting 2 f eet from the results. Manholes shall not be adjusted where the chimney exceeds 2 feet , including the top of the ring and cover to the bottom of the chimney after adjustment. If the chimney including ring and cover is to exceed 2 feet, the manhole shall be reconstructed and payment shall be made under Reconstruct Manhole Structure s. Such price includes , but is not limited to , excavation and backfilling, removal of a portion of the existing structure, brick masonry, mortar, grout, concrete, reinforcing steel, fittings, manhole steps, furnishing and hauling asphalt plant mix and any other materials and placing, maintaining, removing and disposing of traffic ramps. Payment will be mad e under: Pay Item Pay Unit Adjustment of Catch Basins Each Adjustment of Drop Inlets Each Adjustment of Manholes Each Adjustment of Meter Boxes or Valve Boxes Each Adjustment of Oversized Manholes Each Reconstruct Manhole Structure s Each CONVERTING EXISTING CATCH BASINS , DROP INLETS AND JUNCTION BOXES
859-1 Description
Convert existing catch basins, drop inlets and junction boxes to catch basins, drop inlets or junction boxes , including all necessary construction and reconstruction in accordance with the contract.
859-2 Materials
Refer to Division 10. Item Section Brick 1040-1 Concrete Block 1040 -2 Curing Material s 1026 Grout, Type 3 1003 Joint Fillers 1028 -1 Low Modulus Silicone Sealant 1028 -3 Mortar 1040 -9
8-38 Item Section
Portland Cement Concrete, Class B 1000 Reinforcing Steel 1070 Steps 1074 -8 Stone, No. 78M 1005 Structural Steel 1072
859-3 Construction Methods
Perform work in accordance with Article 840- 3 and the details shown in the plans. Raise or lower the existing catch basins an d drop inlets as required by the plans and provisions.
859-4 Measurement and Payment
Convert Existing Catch Basin to Junction Box will be measured and paid in units of each drainage structure that has been acceptably converted. Convert Existing Catch Basin to Drop Inlet will be measured and paid in units of each drainage structure that has been acceptably converted. Convert Existing Catch Basin to Junction Box with Manhole will be measured and paid in units of each drainage structure that has been acceptably converted. Convert Existing Drop Inlet to Junction Box will be measured and paid in units of each drainage structure that has been acceptably converted. Convert Existing Drop Inlet to Catch Basin will be measured and paid in units of each drainage structure that has been acceptably converted. Convert Existing Drop Inlet to Junction Box with Manhole will be measured and paid in units of each drainage structure that has been acceptably converted and accepted by the Engineer . Convert Existing Junction Box to Drop Inlet will be measured and paid in units of each drainage structure that has been acceptably converted. Convert Existing Junction Box to Catch Basin will be measured and paid in units of each drainage structure that has been acceptably converted. If grates and frames are necessary in converting either catch basins or drop inlets or if frames and covers are necessary for junction boxes , separate payment will be made for the grates and frames or cover and frame in accordance with Section 840. Such price will inclu de, but is not limited to , excavating , hauling, removal of a portion of the existing structures, disposal of materials, furnishing, transporting, placing backfill material, subsurface drainage, concrete, brick masonry, mortar, grout, reinforcing steel, har dware, casting, miscellaneous metal, fabricating, welding and galvanizing. Payment will be made under: Pay Item Pay Unit Convert Existing Catch Basin to Junction Box Each Convert Existing Catch Basin to Drop Inlet Each Convert Existing Catch Basin to Junction Box with Manhole Each Convert Existing Drop Inlet to Junction Box Each Convert Existing Drop Inlet to Catch Basin Each Convert Existing Drop Inlet to Junction Box with Manhole Each Convert Existing Junction Box to Drop Inlet Each Convert Existing Junction Box to Catch Basin Each