801 Seventh Avenue S.W., commonly known as the Nexen Building, is a high rise office building in

downtown ''Downtown'' is a term primarily used in North America by English speakers to refer to a city's sometimes commercial, cultural and often the historical, political and geographic heart. It is often synonymous with its central business distric ...

Calgary Calgary ( ) is the largest city in the western Canadian province of Alberta and the largest metro area of the three Prairie Provinces. As of 2021, the city proper had a population of 1,306,784 and a metropolitan population of 1,481,806, makin ...

Alberta Alberta ( ) is one of the thirteen provinces and territories of Canada. It is part of Western Canada and is one of the three prairie provinces. Alberta is bordered by British Columbia to the west, Saskatchewan to the east, the Northwest Ter ...

Canada Canada is a country in North America. Its ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, covering over , making it the world's second-largest country by tot ...

. It is a 37-storey

skyscraper A skyscraper is a tall continuously habitable building having multiple floors. Modern sources currently define skyscrapers as being at least or in height, though there is no universally accepted definition. Skyscrapers are very tall high-ris ...

, with a height of 153 m (502 ft).Emporis
Nexen Building
/ref> It was designed by ''CPV Group Architects and Engineers Ltd'' and built by ''CANA Construction Company Limited''. The late-

modernist Modernism is both a philosophical and arts movement that arose from broad transformations in Western society during the late 19th and early 20th centuries. The movement reflected a desire for the creation of new forms of art, philosophy, an ...

building was completed in 1982. The Nexen Building employs a composite stub-girder steel-frame floor system,Stringer, David C.
Staggered Truss and Stub Girder Framing Systems in Western Canada
". ''Technical paper published by the Canadian Steel Construction Council''. 1982. Retrieved on January 20, 2009. originally developed in part by Joseph Colaco.Colaco, Joseph P.
A Stub-Girder System for High-Rise Buildings
. ''Technical paper presented at the AISC National Engineering Conference, New York''. May 1972. Retrieved on January 20, 2009. It is unique in that it is one of the few buildings in Calgary that do not follow the traditional grid pattern of the downtown core. Instead of facing south–north, or east–west, it stands diagonally.

Tenants

The original tenant of the Nexen Building was the

NOVA Corporation NOVA Chemicals Corporation is a Canadian petrochemical company that has been in operation since 1954. NOVA was formed as provincial crown corporation called the Alberta Gas Trunk Line Company Limited to manage Alberta's natural gas collection s ...

. In 2000, the building became

Nexen CNOOC Petroleum North America ULC, formerly known as Nexen, is a Canadian oil and gas company based in Calgary, Alberta. Originally the Canadian subsidiary of US-based Occidental Petroleum (known as Canadian Occidental Petroleum or CanOxy), it ...

's headquarters. Nexen was purchased by Chinese state-owned

CNOOC China National Offshore Oil Corporation, or CNOOC Group (Chinese: 中国海洋石油总公司 Pinyin: ''Zhōngguó Háiyáng Shíyóu Zǒnggōngsī''), is one of the largest national oil companies in China, and the third-largest national oil c ...

in 2013 and reduced its workforce over time. Nexen moved from the Nexen Building in 2019, instead subleasing 8 floors of The Bow from Cenovus, leaving the Nexen Building the largest-ever completely vacant building in

downtown Calgary Downtown Calgary is a dense urban district in central Calgary, Alberta. It contains the second largest concentration of head offices in Canada, despite only being the country's fourth largest city in terms of population. The downtown is divided i ...

References

Buildings and structures in Calgary Skyscrapers in Calgary 1982 establishments in Alberta Skyscraper office buildings in Canada Office buildings completed in 1982 {{Alberta-struct-stub

Tenants

See also

References