EXHIBIT 11 ROBERTSON-CECO CORPORATION COMPUTATION OF EARNINGS PER COMMON SHARE (Thousands, except per share amounts) (Unaudited) Three Months Ended Nine Months Ended September 30 September 30 1997 1996 1997 1996 PRIMARY: Income from continuing operations . . . . . . $ 5,579 $ 39,624 $ 13,074 $ 49,431 Extraordinary gain on debt redemption . . . . . . - - 4,568 - Net Income . . . . . . . . . . . . . . . . . . . $ 5,579 $ 39,624 $ 17,642 $ 49,431 Average number of shares of common stock outstanding . . . . . . . . . . 16,056 16,009 16,056 16,009 Incremental shares to reflect dilutive effect of deferred compensation plan . . . . . . . . . . . . . . 36 117 33 114 Total shares . . . . . . . . . . . . . . . . . . 16,092 16,126 16,089 16,123 Per common share: Income from continuing operations . . . . . . . . $ .35 $ 2.46 $ .82 $ 3.07 Extraordinary gain on debt redemption . . . . . . - - .28 - Primary earnings per share . . . . . . . . . . . $ .35 $ 2.46 $ 1.10 $ 3.07 EXHIBIT 11 ROBERTSON-CECO CORPORATION COMPUTATION OF EARNINGS PER COMMON SHARE (Thousands, except per share amounts) (Unaudited) Three Months Ended Nine Months Ended September 30 September 30 1997 1996 1997 1996 FULLY DILUTED: Income from continuing operations . . . . . . $ 5,579 $ 39,624 $ 13,074 $ 49,431 Extraordinary gain on debt redemption . . . . . . . . . . . . . . . . . . . - - 4,568 - Net income . . . . . . . . . . . . . . . . . . . $ 5,579 $ 39,624 $ 17,642 $ 49,431 Average number of shares of common stock outstanding . . . . . . . . . . 16,056 16,009 16,056 16,009 Incremental shares to reflect dilutive effect of deferred compensation plan . . . . . . . . . . . . . . . 36 140 33 150 Total shares . . . . . . . . . . . . . . . . . . 16,092 16,149 16,089 16,159 Per common share: Income from continuing operations . . . . . . . . $ .35 $ 2.45 $ .82 $ 3.06 Extraordinary gain on debt redemption . . . . . . - - .28 - Fully diluted earnings per share . . . . . . . . $ .35 $ 2.45 $ 1.10 $ 3.06