Con Cast Pipe’s three-sided culverts, Tri-Span, are the ideal solution for applications that involve streams, creeks or other narrow waterways. Tri-Span geometry incorporates two attractive features for culvert design. First, Tri-span has no bottom slab –it is specifically designed not to disturb the streambed, thus protecting the aquatic habitat. Secondly, Tri-Span’s flat top design is ideal for low cover applications where the depth of the road structure is limited. These environmentally friendly culverts are a cost effective alternative to full bridge construction. Multiple standard sizes that offer a full range of vertical & horizontal combinations. Rigid frame design with hinged supports helps limit both lateral restraints and induced moments to the structure. Because they are precast, Tri-Span culverts allow for speedy installation and durability over the long run, making them the ideal option for many projects.

Tri-Span Size Guide
Tri-Span Maximum Angle Skew

Ideal applications:
• Small bridge construction and replacement
• Roadway, railway, and airport underpasses/overpasses
• Stream enclosures
• Pedestrian walkways

Installation Requirements:
• Strip footings for the supporting foundation;

Installation Options:
• Precast wingwalls
• Precast headwalls
• Precast footings