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Ocean Pipe produces a range of precast box culverts that can be used for a variety of horizontal and vertical applications. Primarily intended for use as a horizontal conduit where headroom is limited, precast boxes can significantly cut the costs by reducing or eliminating formwork, dewatering, traffic control and curing when compared to cast-in-place concrete.

Precast boxes can be designed for various depths and loading conditions including truck, railway and airplane loads. Similar to concrete pipe, precast box culverts are available in unique configurations including miter bends, wyes, cast-in baffles, and manhole access openings.


Precast Box Applications

  • Storm sewer systems
  • Underground storage tanks
  • Drainage culverts
  • Pedestrian and wildlife crossings
  • Manholes
  • Utility chambers and corridors
  • Small bridges
  • Conveyor tunnels

Precast Boxes Are Designed To The Following Standards:
ASTM C1433 Standard Specification for Precast Reinforced Concrete Box Sections for Culverts, Storm Drains, and Sewers
CSA S6-06 Canadian Highway Bridge Design Code

Precast Box Drawings

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

Standard Vertical Box Manhole


Maximum Pipe Size For Box Sections (1800mm x 900mm To 2400mm x 1500mm)

Maximum Pipe Size For Box Sections (2400mm x 2400mm To 3000mm x 2400mm)

To see the drawings for each size, click the following links:

1800mm X 900mm1800mm X 1200mm2400mm X 1500mm
Base/Plug Base/PlugBase/Plug
Slab Top/CapSlab Top/CapSlab Top-Cap


2400mm X 2400mm3000mm X 1500mm   3000mm X 2400mm
BoxBox   Box
Base/PlugBase/Plug   Base/Plug
Slab Top/CapSlab Top/Cap    Slab Top/Cap