0001104659-06-015390 10-K 10 20051231 20060309 20060309 STEEL DYNAMICS INC 0001022671 3312 351929476 IN 1204 10-K 34 000-21719 06676777 6714 POINTE INVERNESS WAY SUITE 200 FORT WAYNE IN 46804 2604593553 6714 POINTE INVERNESS WAY SUITE 200 FORT WAYNE IN 46804 10-K 1 a06-4486_210k.htm ANNUAL REPORT PURSUANT TO SECTION 13 AND 15(D) EX-12.1 2 a06-4486_2ex12d1.htm STATEMENTS REGARDING COMPUTATION OF RATIOS EX-21.1 3 a06-4486_2ex21d1.htm SUBSIDIARIES OF THE REGISTRANT EX-23.1 4 a06-4486_2ex23d1.htm CONSENTS OF EXPERTS AND COUNSEL EX-31.1 5 a06-4486_2ex31d1.htm 302 CERTIFICATION EX-31.2 6 a06-4486_2ex31d2.htm 302 CERTIFICATION EX-32.1 7 a06-4486_2ex32d1.htm 906 CERTIFICATION EX-32.2 8 a06-4486_2ex32d2.htm 906 CERTIFICATION GRAPHIC 10 g44862dki001.jpg GRAPHIC GRAPHIC 11 g44862dki002.jpg GRAPHIC