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' SECTION 03420 - PRECAST CONCRETE LINTELS <br /> PART 1 - GENERAL <br /> ' 1 . 01 DESCRIPTION OF WORK <br /> Furnish and install all required Precast Lintels and Door Headers in the locations called <br /> ' out on the architectural and structural drawings as manufactured by WEKIWA <br /> CONCRETE PRODUCTS , INC . or an approved equal . Lintels available through CSR <br /> ' Rinker. <br /> 1 . 02 RELATED WORK SPECIFIED ELSEWHERE <br /> ' Concrete Section 03010 <br /> Concrete Formwork Section 03100 <br /> Concrete Reinforcement Section 03200 <br /> ' Cast in place Concrete Section 03300 <br /> 1 . 03 QUALITY ASSURANCE <br /> ' A . ASTM Standards (Latest Editions) : <br /> 1 . ASTM A615 (Grade 40) for reinforcing bars . <br /> 2 . ASTM A416 , 7 wire for prestress strands . <br /> ' B . ACI StandardsLa <br /> ( test Editions) : <br /> 1 . ACI 315 , Detail Reinforcement. <br /> ' 2 . Concrete Operations shall comply with ACI Standards . <br /> 3 . Design and Construction shall conform to the specification of the national <br /> ' concrete masonry association and ACI 530 , <br /> 4 , ACI 318 -95 , Building Code Requirements for Structural Concrete . <br /> ' C . Standard Building Code, latest edition. <br /> D . American Society of Civil Engineers minimum design loads for Buildings and <br /> ' Other Structures (ASCE 7-95) . <br /> PART 2 - PRODUCTS <br /> 2 . 01 CONCRETE <br /> A . Concrete Compressive Strength at 28 days : <br /> ' 1 . Pre-cast w/standard reinforcement- 3500 PSI . <br /> 2 . Pre-cast w/prestress reinforcement- 5000 PSI . <br /> ' 3 . Concrete Fill (placed in field) - 3000 PSI . <br /> 2 . 02 MASONRY <br /> t A. Minimum masonry unit strength fm 1250 PSI . <br /> B . Mortar shall be type- S . <br /> 03420- 1 <br />