MANHOLE CASTING REFERENCE GUIDE
recycled material content of 85%. All manufacturers should provide material certifications on product that includes country of origin and material quality and if requested, shall provide load test data on the casting. Gray Iron Iron conforming to ASTM A48, Class 35B, as noted in section 7.1.1 and 7.1.3 of AASHTO M306. Class 35B exhibits
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