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Your Location: World North America Canada Alberta Calgary The Bow

The Bow


The Bow
EnCana and Cenovus Headquarters


Structure in General

existing [completed]
trussed tube
curtain wall


commercial office
parking shop(s)


  • Tallest building in Canada west of Toronto, and the third tallest in Canada on completion.
  • The building is named after the river that runs beside Calgary's downtown.
  • Canada's first trussed-tube skyscraper similar to John Hancock Center and One Maritime Plaza.
  • The steel-framed structure is crescent-shaped.
  • The shape and position of the tower allows for views, maximum sunshine, and also deals effectively with summer and winter wind patterns.
  • The building's shape deflects the prevailing winds, thus allowing for a lighter structure.
  • The advanced design uses glass and steel engineering that makes the building 30% lighter than any its size.
  • The solar heat collected in the atrium is redistributed, in winter by means of extraction, in summer using heat exchange. Redistribution reduces the load on the mechanical systems.
  • Substantial glazed areas lead to a reduction in the need for artificial lighting.
  • The building uses a raised-floor displacement ventilation system.
  • At levels 24, 42 and 54 there are three six-storey-high sky gardens - indoor park-like levels with natural vegetation - with seating and meeting spaces serviced by express elevators.
  • Canada's second largest building in floor space after First Canadian Place in downtown Toronto.
  • A typical floor is approximately 38,564 square feet.
  • Retail and cultural space is approx. 200,000 square feet.
  • The EnCana headquarters provides space for 3,200 employees, once housed in five buildings.
  • The building site area is 188,300 square feet and covers most of one full city block.
  • 39,000 tonnes of steel and 900,000 square feet of glass were used in construction.
  • The foundations are 3 metres thick and contain 14,000 cubic metres of concrete.
  • The raft slab for the foundation took 39.5 hours to pour and required 94 concrete trucks, making it the largest single concrete pour in Canadian construction history.
  • 400,000 metres of land were excavated for the project.
  • The intersecting triangular sections of the south atrium wall form the largest diagrid of architecturally exposed structural steel (AESS) in the world.
  • Total cost for the project, on announcement day, was estimated to be between $850 million and $1 billion.

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More Information


500 Centre Street Southeast
T2P 2S5

Technical Data

778.87 ft

Involved Companies

Design Architect:

Associate Architect:

Also recorded for this building:

acoustics consultant, art consultant, artist, civil engineering, construction management, consultant, developer, electrical engineering, elevator consultant, environmental consultant, facade consultant, facade supplier, fire protection engineering, glass supplier, interior designer, landscape architect, lighting consultant, master plan architect, mechanical engineering, quantity surveyor, structural engineering, tenant, traffic consultant, wind surveyor

Features & Amenities

  • One of the city's famous buildings
  • City landmark
  • Bicycle storage is available