Aceros Lozano S.A. de C.V.

Specified Services   AISC Fracture Critical Endorsement Doc Preparation & Creation Onsite Assessment Aceros Lozano S.A. de C.V. Carr. San roque 502 Cd. Benito Juarez N.L. Office: 81 8127 9000 F: 81 8326 1709 Contact Jose Santos Guerra Herrera Gerencia de Aseguramiento de Calidad Last Year Serviced 2016

American Agencies Co., Inc.

Specified Services   AISC Steel Building Structures Doc Preparation & Creation Onsite Assessment American Agencies Co., Inc. Old State Road No. 1, Bldg. 1554 Sector El Cinco Río Piedras, Puerto Rico 00927 Contact George Vendrell Last Year Serviced 2009

Acero Estrella

Specified Services   AISC Steel Building Structures Doc Preparation & Creation Onsite Assessment Monthly Executive Management Assistance Acero Estrella Autopista Duarte KM13 Santiago Dominican Republic 33166-6505 Office: (809) 247-3434 F: (809) 247-3770 Contact Manuel Genao Vice President Last Year Serviced 2019

Imper de Chihuahua

Specified Services   Remote Gas Assessment Imper de Chihuahua Av. Sicomoro 3303, Nombre de Dios Chihuahua, Chihuahua Mexico 31110 Office: 52 (614) 419-1888 Contact Luis Carlos Enriquez Quality Assurance Manager Last Year Serviced 2019