Manholes

Precast concrete manholes engineered for municipal, utility, and commercial applications.

• Diameters Available : 24" - 144"

• Compliance: ASTM C478 Compliant

• Approvals: WSDOT & ODOT Approved

• Options: Custom Inverts & Penetrations Available

Available Sizes

Standard details shown. Project- specific configurations available.

Select a diameter to view standard details