Permits & Development - Encroachment(EP)/Driveway(DW) Permits - 2007_EP-07-301 thru EP-07-400_ - EP-07-352

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SECTION 53: SHOTCRETE Issue Date: January 5,2007 The third paragraph in Section 53-1.01,"Description,"of the Standard Specifications is amended to read: • The dry-mix process shall consist of delivering dry mixed aggregate and cementitious material pneumatically or mechanically to the nozzle body and adding water and mixing the materials in the nozzle body. The wet-mix process shall consist of delivering mixed aggregate,cement,and water pneumatically to the nozzle and adding any admixture at the nozzle. The first through fourth paragraphs in Section 53-1.02, "Materials,"of the Standard Specifications is amended to read: • Cementitious material, fine aggregate, and mixing water shall conform to the provisions in Section 90, "Portland Cement Concrete." Shotcrete to be mixed and applied by the dry-mix process shall consist of one part cementitious material to not more than 4.5 parts fine aggregate,thoroughly mixed in a dry state before being charged into the machine. Measurement may be either by volume or by mass. The fine aggregate shall contain not more than 6 percent moisture by mass. • Shotcrete to be mixed and applied by the wet-mix process shall consist of cementitious material, fine aggregate,and water and shall contain not less than 375 kilograms of cementitious material per cubic meter. A maximum of 30 percent pea gravel may be substituted for fine aggregate. The maximum size of pea gravel shall be such that 100 percent passes the 12.5 mm screen and at least 90 percent passes the 9.5 mm screen. • Admixtures may be added to Shotcrete and shall conform to the provisions in Section 90-4,"Admixtures." The third subparagraph of the third paragraph in Section 53-1.04, "Placing Shotcrete," of the Standard Specifications is amended to read: Aggregate and cementitious material that have been mixed for more than 45 minutes shall not be used unless otherwise permitted by the Engineer. SECTION 55: STEEL STRUCTURES Issue Date: January 5,2007 The third and fourth paragraphs of Section 55-1.01, "Description,"of the Standard Specifications are amended to read: • Details of connections for highway bridges selected for use by the Contractor shall conform to the AASHTO LRFD Bridge Design Specifications with Caltrans Amendments. • Details of design selected by the Contractor, fabrication and workmanship,for steel railway bridges shall conform to the requirements of the Specifications for Steel Railway Bridges, for Fixed Spans Not Exceeding 400 Feet in Length of the AREMA,as set forth in the special provisions. The third paragraph of Section 55-1.05, "Falsework,"of the Standard Specifications is amended to read: • Construction methods and equipment employed by the Contractor shall conform to the provisions in Section 7-1.02, "Load Limitations." Loads imposed on existing, new or partially completed structures shall not exceed the load carrying capacity of the structure, or portion of structure, as determined by the AASHTO LRFD Bridge Design Specifications with Caltrans Amendments. The fourth and fifth paragraphs of Section 55-2.01, "Description,"of the Standard Specifications are amended to read: • All structural steel plate used for the fabrication of tension members,tension flanges, eyebars and hanger plates and for splice plates of tension members, tension flanges and eyebars shall meet the longitudinal Charpy V-notch impact value requirements specified herein. Sampling procedures shall conform to the requirements in ASTM Designation: A 673. The H (Heat) frequency of testing shall be used for structural steels conforming to the requirements in ASTM Designations: A 709/A 709M,Grades 36[250], 50[345],50W[345W],and HPS 50W[345W]. The P(Piece)frequency of testing shall be used for structural steel conforming to the requirements in ASTM Designation: A 709/A 709M, Grades HPS 70W [485W], 100 [690], and 100W [690W]. Charpy V-notch impact values shall be determined in conformance with the requirements in ASTM Designation: E 23. Contract No. 10-OM7104 43