Flat Top - Detail 420 - 60 in. dia. w/ 30 in. Eccentric Opening - Maricopa Assoc Governments

SKU:
FT-6030-MAG-420

Jensen concrete manhole flat top is designed for sanitary sewer and storm drain access applications and provides a flat structural closure with grade-level access.

  • Opening: Eccentric (off-center)
  • Barrel diameter: 60"
  • Opening diameter: 30"
  • Compliance: ASTM C478

Contact your Jensen representative for sizing and configuration details.

Delivery available to:
  • Arizona

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 concrete manhole flat top caps a below-grade access structure at shallow depths. Designed for sanitary sewer and storm drain manholes, it provides a flat structural closure with a grade-level opening while supporting durable underground access infrastructure.

Features

  • Flat closure for shallow-depth manholes
  • Reinforced concrete for load-bearing strength
  • Precast for consistent quality
  • Grade-level access opening

Applications

  • Shallow sanitary sewer manholes
  • Storm drain access structures
  • Grade-level transitions

Technical Specifications

Weight: 2990 lb
Agency: Maricopa Association of Governments
Agency Identifier: Detail 420
Load Rating: A-16 (AASHTO HS-20-44)
Product Type: Flat Top
Design Specification: ASTM C-478, AASHTO M199
Diameter (Inside - Min): 30 in.
Diameter (Outside - Min): 60 in.
Diameter (Outside - Max): 72 in.
Wall Thickness (Nominal): 6 in.
Access Point Configuration: Eccentric
Height (Inside): 12 in.
Delivery to: Arizona

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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