A Lehigh Hanson Company

 

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Manholes

Manholes are typically used to provide access to pipelines, junction points, valve chambers, sump pits, and underground detention tanks.

Man Hole

Manholes

Precast circular manholes are manufactured in 900mm to 3000mm nominal diameters. Manhole riser sections in diameters up to 2400mm are stocked in standard 0.3m, 0.6m, 0.9m, and 1.2m heights. Manhole sections can be customized to suit unique project specifications by adding flat bases, prebenching, cored holes and flexible connections.

Manholes are Manufactured to Meet the Following Standards:
ASTM C478 Standard Specification for Precast Reinforced Concrete Manhole Sections
CSA 257.4 Standards for Concrete Pipe and Maintenance Hole Sections

Manhole Sizing Guidelines

Flotation of Concrete Manholes:
Flotation of concrete manholes is calculated in a similar manner to flotation in concrete pipe. In areas where flotation is a concern, Ocean Pipe can manufacture manhole sections with extended bases, helping to resist flotation by increasing the size of the failure cylinder and adding additional anchoring force by providing a cone of soil above the extended lip. For more information, click here

 

Manhole Drawings

Detailed dimensions are provided on drawings for all our standard Manhole products to assist with your design projects.
Please contact us if you require additional information.

Standard:
Standard Manhole Buildup

Maximum Pipe Size for Manholes 1050-2100
Maximum Pipe Size for Manholes 2400-3050

900 mm  1050 mm  1200 mm1350 mm1500 mm1800 mm2400 mm
Bases BasesBasesBasesBasesBasesBases
RisersRisersRisersRisersRisersRisersRisers

Slab Tops

Slab Tops

Slab Tops

Slab Tops

Slab Tops

Slab Tops

Slab Tops

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