0001125282-03-005988 10-Q 5 20030930 20031110 STEEL DYNAMICS INC 0001022671 3312 351929476 IN 1231 10-Q 34 000-21719 03987732 6714 POINTE INVERNESS WAY SUITE 200 FORT WAYNE IN 46804 2604593553 6714 POINTE INVERNESS WAY SUITE 200 FORT WAYNE IN 46804 10-Q 1 b327992_10q.txt FORM 10-Q EX-31.1 3 b327992_31-1.txt CERTIFICATION OF CEO EX-31.2 4 b327992_31-2.txt CERTIFICATION OF PRINCIPAL FINANCIAL OFFICER EX-32.1 5 b327992_32-1.txt CERTIFICATION OF CEO EX-32.2 6 b327992_32-2.txt CERTIFICATION OF PRINCIPAL FINANCIAL OFFICER