International Bridge Technologies

Samuel De Champlain Bridge – Montréal, Canada

Technical details
Infrastructure Canada

Construction Completed: 2019

Montréal, Canada
Contractor: Signature on the Saint Lawrence Construction (SNC Lavalin Major Projects, Dragados Canada and Flatiron Constructors Canada Joint Venture)
SYSTRA IBT’s role in the T.Y. LIN-SYSTRA IBT-SLI Joint Venture: Bridge Design Consultant for the design of the steel approach superstructure and independent check of cable-stayed main span.


  • Total Bridge Length: 3335 m (10,942 ft)
  • Approach Spans: 80.4 m (263 ft) typical, 110 m (360) maximum
  • Width: 50.255 m (164 ft) wide deck
  • Pylon height: 170 m (557 ft)
  • Width: 60 m (196 ft)
  • 3 separate decks
  • 8 traffic lanes plus 2 shoulder lanes
  • 11 million public transport users
  • More than 50 million vehicles expected per year
  • More than 9,000 deck slabs
  • 74 piers of which 42 double piers
  • 37 pier caps
  • 600 box-girders
  • More than 1 million bolts
  • Up to 1,600 workers on site
  • 8.4 million hours of work
  • 4 yrs. of work by SYSTRA IBT

The typical 50.255 m (164 ft) wide deck constructed by two 5 meter gaps between deck structures allows for 6 lanes of traffic, 2 lanes of a transit corridor, and a multiple-use path. Each roadway deck consists of a constant depth, composite twin steel box girder with a precast concrete deck.

The 240 m (787 ft) cable-supported main span crosses the St. Lawrence Seaway with a vertical clearance of 38.5 m (126 ft) above high-water level. The three individual structures are connected by steel cross beams over the length of the main spans. The superstructure is supported by two planes of stay cables anchored in a twin-leg pylon straddling the transit corridor. The lower pylon is made of precast, match-cast concrete segments, while the upper pylon is cast in place. The back span for the cable-stayed bridge was erected on falsework, and the main span was erected segmentally in one direction with a lifting system on the deck. The pylons and piers for the cable-stayed structure are supported on piles socketed into the rock.

The approach spans are continuous with four to seven spans per unit. The typical approach span length is 80.4 m (263 ft). A 109 m span is required for crossing Route 132 at the east end of the bridge. The approach spans are supported on unique piers with twin inclined legs. The pier legs are made of precast, match-cast concrete segments that are connected with post-tensioning tendons to a steel pier cap. The piers are generally supported on precast concrete spread footings keyed into the rock. The approach spans are erected with floating cranes. The steel girders are spliced to limit the maximum lifting weight to 85 t.


  • 2022 The International Road Federation – Global Road Achievement Award
  • 2020 ACEC California – Engineering Excellence Honor Award
  • 2020 PCI – International Transportation Structure Award
  • 2020 CCE – Award of Excellence and The Schreyer Award
  • 2019 NCSEA Structural Engineering Excellence Award
  • 2018 The Institute for Sustainable Infrastructure – Envision Platinum Award