TXDOT specifications 180-18™ inlet cover set. 3-1/2″ tall cast gray iron ring with 18″ diameter cast iron or steel cover (Refer to engineering specifications on job blueprints for details on which lid is specified) Stock item. Typically used in curb inlet installations that are not in traffic. Uncoated cast gray iron ring and cover are ASTM A48 CL35B or better AASHTO M306-10 (M105) and uncoated flat steel plate steel lid is ASTM A-36 U.S. domestic source steel. Made in USA. LEED® certifications available on request. Please use the Contact Form or call us to request info & submittal sheets.
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