Gibraltar Industries, Inc. (Nasdaq:ROCK) shares are flying high in Thursday morning trading after the Buffalo-based maker of building products posted first-quarter earnings of $6.7 million, or $0.22 per share, topping Wall Street’s expectation of earning $0.14 per share. A year earlier, Gibraltar posted earnings of $6.2 million, or $0.21 per share.

Quarterly sales edged up 7% to $325.6 million versus $304.3 million during the prior-year period. Wall Street analysts anticipated $317.6 million.

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