Though suffering through the Hamilton Street Railway strike of 1906, with industrial businesses expanding, Hamilton's population doubled between 1900 and 1914. Two steel manufacturing companies, Stelco and Dofasco, were formed in 1910 and 1912, respectively. Procter & Gamble and the Beech-Nut Packing Company opened manufacturing plants in 1914 and 1922, respectively, their first outside the US. Population and economic growth continued until the 1960s. In 1929 the city's first high-rise building, the Pigott Building, was constructed; in 1930 McMaster University moved from Toronto to Hamilton, in 1934 the second Canadian Tire store in Canada opened here; in 1940 the airport was completed; and in 1948, the Studebaker assembly line was constructed. Infrastructure and retail development continued, with the Burlington Bay James N. Allan Skyway opening in 1958, and the first Tim Hortons store in 1964.