Commercial Metals Company – COMMERCIAL METALS COMPANY and U.S. BANK NATIONAL ASSOCIATION Trustee SECOND SUPPLEMENTAL INDENTURE DATED AS OF JULY 11, 2017 TO INDENTURE DATED AS OF MAY 6, 2013 5.375% SENIOR NOTES DUE 2027 (July 11th, 2017)

SECOND SUPPLEMENTAL INDENTURE, dated as of July 11, 2017 (this Supplemental Indenture), between Commercial Metals Company, a corporation duly organized and existing under the laws of the State of Delaware, having its principal office at 6565 N. MacArthur Blvd., Irving, Texas 75039 (the Company), and U.S. Bank National Association, a national banking association duly organized and existing under the laws of the United States of America and having its principal office at 800 Nichollet Mall, Minneapolis, Minnesota 55402, as trustee (the Trustee) under the Indenture (as hereinafter defined).

Commercial Metals Company – OMNIBUS AMENDMENT NO. 2 Amendment No. 3 to Receivables Sale Agreement, Amendment No. 3 to Receivables Purchase Agreement, and Amendment No. 3 to Performance Undertaking (August 21st, 2014)

(fj) WFB in its capacity as administrative agent for the Purchasers (in such capacity, together with its successors and assigns in such capacity, the Administrative Agent).

Commercial Metals Company – OMNIBUS AMENDMENT NO. 1 - - - Amendment No. 2 to Receivables Sale Agreement, Amendment No. 2 to Receivables Purchase Agreement, and Amendment No. 2 to Performance Undertaking (July 2nd, 2013)

THIS OMNIBUS AMENDMENT NO. 1 (this "Amendment") is entered into as of May 3, 2013 (the "Effective Date"), by and among Commercial Metals Company, a Delaware corporation, individually ("CMC") and as provider of the Performance Undertaking (the "Performance Guarantor"), CMC Cometals Processing, Inc., a Texas corporation ("Cometals"), Howell Metal Company, a Virginia corporation ("Howell"), Structural Metals, Inc., a Texas corporation ("SMI"), CMC Steel Fabricators, Inc., a Texas corporation ("CMC Steel"), SMI Steel LLC, an Alabama limited liability company (previously known as SMI Steel Inc., an Alabama corporation) ("SMI Steel"), SMI-Owen Steel Company, Inc., a South Carolina corporation ("SMI Owen"), Owen Electric Steel Company of South Carolina, a South Carolina corporation ("Owen Electric"), AHT, Inc., a Pennsylvania corporation ("AHT", together with CMC, Cometals, Howell, SMI, CMC Steel, SMI Steel, SMI Owen and Owen Electric, the "Originators"), CMC Receivables, Inc., a Delaware cor

Commercial Metals Company – COMMERCIAL METALS COMPANY and Trustee FIRST SUPPLEMENTAL INDENTURE DATED AS OF MAY 20, 2013 TO INDENTURE DATED AS OF MAY 6, 2013 4.875% NOTES DUE 2023 (May 20th, 2013)

FIRST SUPPLEMENTAL INDENTURE, dated as of May 20, 2013 (this Supplemental Indenture), between Commercial Metals Company, a corporation duly organized and existing under the laws of the State of Delaware, having its principal office at 6565 N. MacArthur Blvd., Irving, Texas 75039 (the Company), and U.S. Bank National Association, a national banking association duly organized and existing under the laws of the United States of America and having its principal office at 800 Nichollet Mall, Minneapolis, Minnesota 55402, as trustee (the Trustee) under the Indenture (as hereinafter defined).