Bridge-In-a-Box is a modular steel girder vehicle bridge coming to you pre-fabricated and pre-engineered. Steel modular bridges are the newest pre-fabricated product offered by Canada Culvert. Single or double lane available with spans up to 24.5 m. A typical Bridge-In-a-Box can be assembled and placed onto the abutments in one day.


The pre-fabrication process guarantees substantial transportation savings and quick installation on site. Bridge-In-a-Box is strong yet lightweight, allowing customers to complete the project in all weather conditions with typical construction equipment.


Bridge-In-a-Box design is complemented by standard guardrail steel post with W-Beam or Thrie Beam guardrail rail for low volume roads. The open span ensures exceptional hydraulics with little impact on the stream environment.


Bridge-In-a-Box sits on bearing pads or plates connected to the bridge seat. One end is fixed and the other end is free to slide to hold expansion and contraction when temperature changes.


Depending on the site and soil conditions Canada Culvert can design and supply Bin-Wall abutments (corrugated steel gravity wall) to support the bridge. Other abutments options include precast sills, cast in place concrete or pile foundations.


The design of Bridge-In-a-Box complies to Canadian Highway Bridge Design Code (CHBDC) for pedestrian and highway live loads.


Steel modular bridges are cost effective solution for local municipal and township low volume roads (LVR).


Perfect for road overpasses, stream crossing, detour bridges. Both for temporary and permanent usage. Excellent for rural, forestry and remote locations roads.

Bridge-In-a-Box has the following features:


  • Single or double lane available
  • Spans up to 24.5m
  • Running surfaces are asphalt, concrete or timber running planks
  • Type of coatings and finishes used – weathering steel, galvanized, painted/powder coated
  • Number of main beams – a typical two-piece modular bridge will have a minimum of two beams per section. We always use a minimum of four or more beams to avoid creating a “fracture critical” bridge.
  • Expansion joints – rubber expansion joint that connects to galvanized angles between the end of the bridge and the back wall. For smaller bridges on rural roads, the backfill is placed against the back wall at the end of the bridge pinning it in place.