300-24® 4X Manhole Riser Ring

The 300-24® 4x standard cast iron 4″ tall riser ring is a durable and reliable solution for 300-24® series manholes, available as a stock item for quick delivery. Manufactured in the USA from uncoated ASTM A48 Gray Iron CL35B or better and meeting AASHTO M306 standards, this riser ring is H-20 traffic rated when paired with an H-20 traffic rated ring, cover, or grate properly installed in reinforced concrete. Standard-size steel riser rings are readily available, with additional sizes and styles offered for special orders, ensuring versatility for various applications.

Contact Bass & Hays or call us at 1-800-258-2278 toll free or 972-263-1360 DFW Metro. Check stock, request technical data, drawings, submittals, BABA, AIS or LEED  documentations and certifications, or to place orders.