Storm Manholes

Precast storm manholes provide the most cost-effective access and transition points in your storm sewer system.  Typical configurations consist of a base unit, risers and a top section.

  • StormAvailable in sizes from 48” to 144” diameter.
  • Precast Storm Inverts Available in Select Markets
  • Standard and Custom Tops
  • Knock-out Panels in Select Markets
  • Custom Hole Penetrations
  • Doghouse risers (for straddling an existing line)
  • Anti-Flotation Collars

The round design of a manhole provides significant design efficiencies which in turn helps keep your project costs to a minimum.  Standard storm manholes offer loading for HL93; however, custom designs are available.  Foley provides numerous standard top designs; however, custom tops are available for project specific rings and covers or grates and frames. 

Storm Manhole Cut-Sheets



Key Specifications:        

  • ASTM C478/AASHTO M199 – Standard Specification for Circular Precast Reinforced Concrete Manhole Sections
  • ASTM C913 – Standard Specification for Precast Concrete Water and Wastewater Structures