PFMH-60-12.pdf

This document outlines the technical specifications for an Ø60" (152.4 cm) PerkFilter® manhole with 12" (30.48 cm) cartridges, designed for stormwater treatment. Key features include:

- Access Cover: Bolted and gasketed access cover with alternative covers and grated inlet options available.
- Outlet and Inlet: 4" (10.16 cm) outlet pipe diameter; 2.47 cfs maximum bypass capacity; concrete false floor with 12" PerkFilter cartridges.
- Structural Design: Meets AASHTO HS-20-44 loadings, requires a minimum soil cover of 1' (30.48 cm), and assumes a water table below the invert.
- Concrete Requirements: Minimum compressive strength of 5,000 PSI (34.5 MPa) at 28 days; rebar ASTM A615/A706, Grade 60; cement ASTM C150.
- Weight Limits: Maximum pick weights for top slab, riser, and base sections are specified.
- Installation: Oversized holes for pipes must be concentric to pipe ID; annular spaces filled with minimum 3,000 PSI concrete after installation.
- Responsibilities: Contractor is responsible for verifying sizes, locations, and elevations of openings, ensuring adequate bearing surface, and adhering to project specifications.
- Revision History: The sheet is labeled as Revision 1 of 1.