EXHIBIT 11 ROBERTSON-CECO CORPORATION COMPUTATION OF BASIC EARNINGS PER COMMON SHARE (In thousands, except per share data) (Unaudited) Three Months Ended Six Months Ended June 30 June 30 ------------------------ ------------------------- 1999 1998 1999 1998 ----------- ---------- --------- ----------- BASIC: Income: Net income for basic earnings per share calculation ........... $ 5,473 $ 6,519 $ 9,202 $10,027 =========== ============ ============ ======= Shares: Average number of common shares outstanding ............ 16,063 16,060 16,063 16,060 =========== ============ ============ ======= Earnings Per Share: Net income per share ............ $ .34 $ .41 $ .57 $ .62 =========== ============ ============ ======= ROBERTSON-CECO CORPORATION COMPUTATION OF DILUTED EARNINGS PER COMMON SHARE (In thousands, except per share data) (Unaudited) Three Months Ended Six Months Ended June 30 June 30 ------------------ ----------------- 1999 1998 1999 1998 ------- -------- ------- ------- DILUTED: Income: Net income for diluted earnings per share calculation .................. $ 5,473 $ 6,519 $ 9,202 $10,027 ======= ======= ======= ======= Shares: Average number of common shares outstanding ................. 16,063 16,060 16,063 16,060 Incremental shares to reflect dilutive effect of deferred compensation plan 24 37 23 37 ------- ------- ------- ------- Total number of common shares assuming dilution .................. 16,087 16,097 16,086 16,097 ======= ======= ======= ======= Earnings Per Share: Net income per share ................... $ .34 $ .41 $ .57 $ .62 ======= ======= ======= =======