 The 1971 Ibrox disaster, in which 66 supporters were killed on an exit stairway with an old, unsafe design led to Rangers redeveloping their Ibrox Park over the next decade, replacing most of the terracing areas with seated grandstands, based on the Westfalenstadion in Dortmund.It was the first major modernisation of a football stadium in Scotland for decades.In 1986, Clyde became the first of several senior clubs to leave the stadium where they had played since the early years of the sport (1898 in their case); unusually in Scotland they did not own Shawfield Stadium, and the greyhound racing company which were the owners aimed to sell it for redevelopment (which never came to pass) and the football team was evicted.