Atlantic often precasts boxes to any size required. Unique hole sizes and Weir arrangements are typically called for when precasting an Outlet Structure.
Common DOT inlets and their tops are poured on a daily basis.
All are designed and manufactured to meet or exceed the most stringent industry standards. These standards include and are not limited to: AASHTO, ASTM C890, C913, and DOT requirements.
Each Box section is wet cast in a precision steel form. Pipe to manhole connections are placed as required. Top sections are typically cast as a slab with a frame and grate. Hatches and plain holes may vary with each job’s requirements.
Many options are available to our customers, including:
Precast grade adjustment blocks
Grade Rings provide a means to adjust the casting to meet finish grade elevation. They are available for 24″ and 30″ diameter manhole openings and common rectangular DOT inlets. They are 2, 3, 4 or 6″ thick and stacked to the desired thickness. The contractor would lay each coarse in a bed of mortar or suitable joint material.
Plain holes for pipes located as required
Watertight Pipe to Manhole seals manufactured by A-LOK Products, Inc.
Flexible connectors are designed to produce a positive watertight connection for pipes entering precast manholes and other concrete structures.
A-Lok and A-Lok X-CEL
Connectors are cast in concrete at time of manufacture. They function on pure compression, making field installation quick and easy. A watertight connection is maintained with a 10 degree omnidirectional deflection. Available for pipes from 4″ through 84″ inside diameter. The gaskets meet all material and performance requirements of ASTM C923 titled, “Resilient Connectors Between Reinforced Concrete Manhole Structures and Pipes”.
CConnectors are cast in concrete at time of manufacture and clamped onto the outside of the pipe at time of installation. A watertight connection is maintained with a 25 degree omnidirectional deflection. Available for pipes from 1.25″ through 21.25″ outside diameter. The gaskets are manufactured in accordance with the requirements of ASTM C923 titled, “Resilient Connectors Between Reinforced Concrete Manhole Structures and Pipes”.
G3 Boot System
Connectors provide a rubber connection for a cored or preformed hole. An expansion ring is expanded within the gasket to seal it to the concrete structure. The pipe can then be inserted and clamped. A watertight connection is maintained with a 15 degree omni-directional deflection. Available for pipes from 3.50″ through 13.5″ outside diameter. The gaskets are manufactured in accordance with the requirements of ASTM C923 titled, “Resilient Connectors Between Reinforced Concrete Manhole Structures and Pipes”.
A-Lok STM – Connector for Storm Systems
A flexible gasket that is designed to provide a soil-tight, as well as, watertight connection for round and elliptical pipe entering precast concrete structures. Specifically designed for application where a high performance sanitary connector is not necessary. The gasket functions on pure compression will withstand 6 psi. of hydrostatic pressure (equivalent to 13.8 ft of depth).
Polypropylene or Drop Front Aluminum access rungs
Manhole access is often required by use of rungs. Atlantic offers two types of rungs installed at the plant. Rungs are typically set at 12″ centers running the entire vertical height of manhole.
Manufactured by MA Industries
Copolymer Polypropylene Plastic, 1/2″ Grade 60 steel reinforced
Meet OSHA requirements
Teeth and side cleats provide safe tread
Plastic step insert prevents corrosive action between concrete and aluminum
Type 6061-T6 Aluminum
Meet OSHA requirements
Grooves and Drop front provide safe tread
Butyl Rubber for joint seals
D-Lok Rubber Gasket for 48″ and 60″ diameter sanitary manholes (O-Ring for larger manholes). Compression design gasket manufactured in accordance with ASTM C-443 titled, “Joints for Circular Concrete Sewer and Culvert Pipe, Using Rubber Gaskets”. Seal designed to meet requirements of ASTM C-990 titled, “Joints for Concrete Pipe, Manholes, Precast Box Sections Using Preformed Flexible Joint Sealants”. Neoprene (1″x3/4″) Gaskets are used to seal Box Culvert Joints.
Custom wall and slab thickness