Manhole Cone - 36" Concentric Opening - D4858 - 16"H

SKU:
100005158

Jensen concrete concentric cone for sanitary sewer, storm drain, and manhole barrel-to-grade transition applications.

  • Type: Concentric cone
  • Barrel diameter: 48"
  • Opening diameter: 36"
  • Height: 16"
  • Compliance: ASTM C478

Contact your Jensen representative for sizing and configuration details.

Delivery available to:
  • Central California
  • Northern California

Product availability varies by location. If you need a product immediately, contact us to ensure availability.

If you need modifications to a standard product or a complete custom solution, we will work to accommodate your request in a timely manner. Please provide us with a few details about your project. Contact us now.

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Features & Benefits

Jensen precast concrete concentric cones transition the manhole from barrel diameter to the smaller ring-and-cover opening at grade, narrowing uniformly from all sides so the opening sits centered above the barrel.

Concentric cones are specified when project drawings or agency standards call for a centered opening rather than the flat-wall eccentric configuration.

Features

  • Uniform reduction from all sides with the opening centered above the barrel
  • Transitions from barrel diameter to ring-and-cover opening size
  • Available in a range of standard barrel-to-opening diameter combinations
  • Compatible with standard manhole barrel and ring-and-cover components

Applications

  • Sanitary sewer and storm drain manholes specified for concentric cone geometry
  • Installations where project specs or agency standards require a centered opening

Technical Specifications

Weight: 1032 lb
Product Type: Manhole Cone
Access Point Diameter: 36 in.
Cone Type: Concentric
Design Specification: ASTM C478, AASHTO M199
Material: Precast Concrete
Height: 16 in.
Inside Diameter: 48 in.
Outside Diameter: 58 in.
Series: D4858
Delivery to: Central California, Northern California

Product availability varies by location. If you need a product immediately, contact us to ensure availability.

If you need modifications to a standard product or a complete custom solution, we will work to accommodate your request in a timely manner. Please provide us with a few details about your project. Contact us now.

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