2004-013.C - Laserfiche WebLink

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_ SECTION 02402 DRAINAGE STRUCTURES L GENERAL A . Under this item, the Contractor shall build and/or install new catch basins , manholes, dropholes, drop inlets , junction boxes , leaching basins and the like of the types and at the locations shown on the Drawings . ' 2 . MATERIALS A . The materials used in the construction of these structures shall . comply with Section 345 "Portland Cement Concrete " (Type II), Section 415 " Reinforcing Steel " (Grade 40), and Section 425 -3 " Materials " of the FDOT Specifications . Be Sand-cement riprap shall conform to Section 405 of the these Specifications . p ons . 3 . CONSTRUCTION DETAILS A . Construction of the structures shall conform to the details as shown on the Drawings and, unless otherwise specified, shall conform with Section 425 " Inlet, Manholes , and Junction Boxes " of the FDOT Specifications . Required minimum compaction shall be 95 percent of maximum density (AASHTO T- 180) and 100 percent of maximum density (AASHTO T480) in areas of paving or curbing . Be The Contractor shall submit shop drawings for review and approval on all precast structures prior to granting fabrication approval . 4 . GRATES , FRAMES , AND COVERS A . Grate, frame and cover castings shall be of uniform quality and free from blowholes , porosity, hard spots , shrinkage, cracks or other injurious defects . They shall be smooth and well cleaned by shot blasting and, unless otherwise specified, shall be covered with a smooth coating of coal tar pitch varnish of a type which will be tough, tenacious, and resilient throughout the range of expected service temperatures . Be Material used in the manufacture of the castings shall conform to ASTM Specifications A-48 Class 30 Iron or to United States Government Specifications QQI-652 , (latest revision) for gray iron castings . C : \ Down1oad \ techspec - 02402 . doc 02402 - 1