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• If structural composite lumber is proposed for use, the falsework drawings shall clearly identify the structural <br /> composite lumber members by grade (E value), species, and type. The Contractor shall provide technical data from the <br /> manufacturer showing the tabulated working stress values of the composite lumber. The Contractor shall furnish a certificate <br /> of compliance as specified in Section 6-1.07, "Certificates of Compliance," for each delivery of structural composite lumber <br /> to the project site. <br /> • For falsework piles with a calculated loading capacity greater than 900 kN,the falsework piles shall be designed by <br /> an engineer who is registered as either a Civil Engineer or a Geotechnical Engineer in the State of California, and the <br /> calculations shall be submitted to the Engineer. <br /> The first paragraph in Section 51-1.06A(1),"Design Loads,"of the Standard Specifications is amended to read: <br /> • The design load for falsework shall consist of the sum of dead and live vertical loads, and an assumed horizontal <br /> load. The minimum total design load for any falsework, including members that support walkways, shall be not less than <br /> 4800 N/m2 for the combined live and dead load regardless of slab thickness. <br /> The eighth paragraph in Section 51-1.06A(1),"Design Loads,"of the Standard Specifications is amended to read: <br /> • In addition to the minimum requirements specified in this Section 51-1.06A,falsework for box girder structures with <br /> internal falsework bracing systems using flexible members capable of withstanding tensile forces only, shall be designed to <br /> include the vertical effects caused by the elongation of the flexible member and the design horizontal load combined with the <br /> dead and live loads imposed by concrete placement for the girder stems and connected bottom slabs. Falsework comprised of <br /> individual steel towers with bracing systems using flexible members capable of withstanding tensile forces only to resist <br /> overturning,shall be exempt from these additional requirements. <br /> The third paragraph in Section 51-1.06B,"Falsework Construction,"of the Standard Specifications is amended to read: <br /> • When falsework is supported on piles, the piles shall be driven and the actual nominal resistance assessed in <br /> conformance with the provisions in Section 49,"Piling." <br /> Section 51-1.06B, "Falsework Construction," of the Standard Specifications is amended by adding the following <br /> paragraphs: <br /> • For falsework piles with a calculated nominal resistance greater than 1800 kN,the Contractor shall conduct dynamic <br /> monitoring of pile driving and generate field acceptance criteria based on a wave equation analysis. These analyses shall be <br /> signed by an engineer who is registered as a Civil Engineer in the State of California and submitted to the Engineer prior to <br /> completion of falsework erection. <br /> • Prior to the placement of falsework members above the stringers,the final bracing system for the falsework shall be <br /> installed. <br /> Section 51-1.06C,"Removing Falsework,"of the Standard Specifications is amended by adding the following paragraph: <br /> • The falsework removal operation shall be conducted in such a manner that any portion of the falsework not yet <br /> removed remains in a stable condition at all times. <br /> The sixth paragraph in Section 51-1.09,"Placing Concrete,"of the Standard Specifications is amended to read: <br /> • Vibrators used to consolidate concrete containing epoxy-coated bar reinforcement or epoxy-coated prestressing steel <br /> shall have a resilient covering to prevent damage to the epoxy-coating on the reinforcement or prestressing steel. <br /> The fourth paragraph in Section 51-1.12D, "Sheet Packing, Preformed Pads, and Board Fillers," of the Standard <br /> Specifications is amended to read: <br /> • Expanded polystyrene shall be a commercially available polystyrene board. Expanded polystyrene shall have a <br /> minimum flexural strength of 240 kPa determined in conformance with the requirements in ASTM Designation: C 203 and a <br /> compressive yield strength of between 110 and 275 kPa at 5 percent compression. Surfaces of expanded polystyrene against <br /> which concrete is placed shall be faced with hardboard. Hardboard shall be 3 mm minimum thickness, conforming to <br /> ANSI A135.4, any class. Other facing materials may be used provided they furnish equivalent protection. Boards shall be <br /> held in place by nails,waterproof adhesive,or other means approved by the Engineer. <br /> Contract No. 10-OM7104 <br /> 30 <br />