Item 18 - Traffic Signal Installation at Segerstrom Avenue and Rosewood Avenue

Home Browse Search

CITY OF SANTA ANA SPECIFICATIONS PROJECT NO.: 25-6030 TRAFFIC SIGNAL INSTALLATION AT SEGERSTROM AVENUE AND ROSEWOOD AVENUE existing sewer pipes, drop inlets, PCC encasements, etc., necessary to construct each manhole structure complete in place. Concrete for manhole structures shall be Class 560-C-3250. All reinforcing steel used in these structures shall be Grade 40 minimum. Fly ash additives and/or substitutes shall not be permitted. The following is hereby added to Subsection 201-4.1, of the Standard Specification: Concrete curing compound shall be Type 2. The following is hereby added to Subsection 303-1.1, of the Standard Specification: Once any excavation for the construction of a manhole structure is commenced, the Contractor must diligently pursue the completion of the structure, including structure backfill, compaction, and restoration of surface improvements and temporary paving. Open excavations shall be properly barricaded, backfilled or covered with steel traffic plates to the satisfaction of the Engineer at the end of each workday. For new manholes on large sewer mains, or for manholes with extreme depths of cover, a larger diameter manhole will be required. The design of these larger manholes shall be reviewed with and approved by the Water Resources Division. The larger manhole cover shall be in accordance with Standard Plan No. 1211 and these Special Provisions. For larger manhole frames and covers, the Water Resources Division may require frames and covers fabricated of fiber reinforced polymer (FRP). These larger FRP manhole frame and cover sets shall be manufactured by GMI Composites, Inc., no equal. The FRP frame and cover system shall meet the following requirements: contain 45 percent to 70 percent fiber reinforcement; thermoset resin with UV inhibitors to prevent photo degredation; minimum strength to weight ratio of 750:1; integrated gasket to minimize traffic shock, abate noise and orders and prevent water entry into manhole; skid slip resistance greater than 0.6 as described in ASTM C 1028 Standard; and dimensional tolerance of 1/16-inch. The FRP frame and cover shall be designed to exceed AASHTO H-20 loading by a factor of 2.5 (125,000 pounds) and shall meet AASHTO EN124 D400 loading (89,924 pound which exceeds AASHTO Proof Load of 50,000 pounds for severe traffic service) proof load on a 250 mm round plate for 30 seconds. Documentation of certified testing results shall be submitted including complete Fatigue Loading Test with no loss of carrying r•: