Facts about THE BOW
Building THE BOW

  • The canopies for the main doors weighs 6,100lbs each and were brought to the site in four pieces. They required two cranes to lift each one into place.
  • There were 130 different trade disciplines on the project.
  • At the peak there were 1,200 construction workers on site a day.
  • It was estimated that THE BOW would sway 50mm in any direction while being erected.
  • 1200 (420,000 sq ft) tarpaulins were used to contain heat and for wind protection.
  • The washrooms were made and furnished off site and then hoisted into place and connected up.
  • 420,000 cubic meters of dirt was removed from the 20 meter deep excavation for the building.
  • The raft slab pour was the largest continuous building pour in Canadian history.
  • THE BOW was the largest steel project ever built in Canada. It consisted of 37, 000 pieces of steel and 800,000 structural bolts.
  • The steel had to be pre-heated to 250 degrees fahrenheit before welding.
  • Two of the cranes used on THE BOW climbed up the steel structure as it grew.

The Design

  • Facing south with the curve towards the sun, the building takes advantage of natural daylight and heat.
  • THE BOW shape maximizes the number of perimeter offices having views of the downtown and mountains.
  • The Centre Street +15 bridge incorporates dampers to minimize movement during periods of high pedestrian use.
  • The plaza around THE BOW is the size of a football field.The granite for the plaza surface came from Brazil and was manufactured in China.
  • At 236m (775ft) THE BOW is the tallest tower in Calgary.
  • The +15 bridge to Suncor Plaza is the only public connection over Centre Street.
  • The parkade is the largest in Calgary at 1 million sq ft. It provides 1358 parking spots and provision for 320 bicycles.
  • THE BOW has Calgary's only loading dock under an active roadway.
  • If you were to stack all the stairwells in THE BOW on top of each other they would reach to the height of a 348 storey building!
  • THE BOW used 900,000 sq ft of preglazed glass. Glass near the top floors is designed to take more than 100 pounds per sq ft wind load.
  • THE BOW has the largest architecturally exposed diagrid structure of its kind.The pattern is repeated every 6 floors
  • It was the first time a triangular diagrid system had applied in a curved building in North America.
  • There are 100 miles of piping for mechanical services.
  • THE BOW has 1.1 million sq ft of carpet tile.
Keeping THE BOW Running

  • The building automation computer system simultaneously looks at and controls over 7,500 individual pieces of machinery.
  • The smoke exhaust system for the atrium has the capacity to change the air in four and a half jumbo jets every minute.
  • There are:
    • 40 elevators in the north block and 3 in the south block parkade as well as 2 escalators
    • 30,000 individual and 20,000 feet of light fixtures operated by 9,000 wireless control devises.
    • 68,000 phone/data jacks fed by 6.7 million feet of cable.
  • The building has 138 self service coffee bars, 120 washrooms and 150 board and meeting rooms.
  • If the sprinkler pipes in the building were laid end to end they would stretch from THE BOW to High River.
  • THE BOW has 5,750 tonnes of cooling - typically a house will have 4 tonnes.