ASTM-C478M › Standard Specification for Circular Precast Reinforced Concrete Manhole Sections (Metric)
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1.1 This specification covers precast reinforced concrete manhole base sections, riser sections, and appurtenances such as grade rings, tops, and special sections for use in sewer and water works.
absorption; acceptance criteria; base sections; compressive strength; concrete; cone tops; design; flat slab tops; grade rings; ladders; manhole; manufacture; reinforced; riser sections; sewer; steps; tests; water; ICS Number Code 13.060.30 (Sewage water)
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July 15, 2019