FOR IMMEDIATE RELEASE

NATIONAL STEEL CONSTRUCTORS LLC, STEEL CITY ERECTING DIVISION
ANNOUNCE OFFICIAL COMPANY NAME CHANGE TO NATIONAL STEEL CITY LLC

Chief Executive Officer Bob Dunn says the National Steel City name ‘best reflects 85 years of marquee
leadership and operating experience, serving the diverse construction needs of American industry in more
than 30 states nationwide.

BALTIMORE, Electric Power Booth 2021, May 19, 2010 – National Steel Constructors LLC and its Steel
City Erecting division, one of the nation’s leading steel and power industry equipment installation
construction companies, today announced its official company name change to National Steel City LLC
(NSC). The formal announcement was made at the 12th Annual Electric Power show at the Baltimore
Convention Center.

NSC is a premier nationwide steel and ductwork erection, rigging and machinery installation company.
From prime and turnkey installation of Air Quality Control Systems (ACQS), which include: scrubbers,
absorbers, SCRs and renovation of precipitators and scrubbers, to the erection of air-cooled condensers and
coal-handling systems, NSC takes on the responsibility of working directly with facility owners as well as
large prime contractors. NSC is an American Institute of Steel Construction (AISC) Advanced Certified
Steel Erector and holds the ASME R, U, and S code stamps.

NSC is proud to serve a broad cross-section of industrial customers, including: Alabama Power, Bechtel,
Exxon-Mobil, Fluor Constructors, Georgia Pacific, Georgia Power, Gulf Power, Kerr-McGee, Lakeland
Electric, Siemens Westinghouse, ThyssenKrupp, and URS/Advatech.

“The name change to National Steel City best reflects the company’s 85 years of marquee leadership and
operating experience in serving the diverse construction needs of American industry across more than 30
states nationwide,” said NSC Chief Executive Officer Bob Dunn. “The National Steel City name is
synonymous with our sterling reputation for excellence in safety and quality on every project.

About National Steel City

Based in Plymouth, Mich., and Birmingham, Ala., National Steel City builds on marquee experience in
more than 30 states nationwide. NSC is one of the nation’s leading steel and power industry equipment
installation construction companies. NSC’s reputation is built on a history of completing major, complex,
fast-track projects, including Air Quality Control Systems for power plants; airport facilities; aircraft
assembly plants; arenas; automotive manufacturing plants; convention centers and steel mills. For more
information visit www.nationalsteelcity.com, or call 1-800-ERECTOR.

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Media Contact:                                                                                                                                        Company Contact:
Jim Engineer                                                                                                                                            Ryan Rhodes, P.E.
e-Rainmaker PR for National Steel City                                                                                        Director of New Business Development
630.728.1387 or  jim.engineer@e-rainmaker.com                                                                National Steel City, LLC
205.769.9900 or ryan.rhodes@nsc-us.com

or

NATIONAL STEEL CONSTRUCTORS, STEEL CITY ERECTING REPORTS 1.18 RECORDABLE INCIDENT RATE TO OSHA

Superlative safety score is five times lower than the average steel erection contractor, affirming commitment to safety as a company value.

Plymouth, Mich., and Birmingham, Ala., Feb. 16, 2010 – National Steel Constructors LLC and its Steel City Erecting division, one of the nation’s leading steel and power industry equipment installation construction companies, today announced it has reported a 1.18 Recordable Incident Rate to the Occupational Health and Safety Administration (OSHA). The score, approximately five times lower than the average steel erection contractor, affirms National and Steel City’s commitment to safety as a company value.

The company also highlighted its extremely competitive Experience Modification Rate (EMR) as an example of its commitment to continuous safety excellence. A competitive, or low, EMR means a lower cost for workers compensation insurance and cost savings for customers.

“We employ only the most qualified safety managers on our construction projects, all of whom report directly to me and I am personally involved in reviewing our daily safety reports,” said National Steel Constructors CEO Bob Dunn. “Thanks to our important alliance with FDRsafety, we’ve not only built and perpetuated an outstanding safety track record, but instilled a culture of safety that helps us remain competitive for our customers and ahead of the curve as a company.”

FDRsafety President Jim Stanley, who rose to the position of Deputy Assistant Secretary of Labor in the United States government’s Department of Labor, regularly consults with National and Steel City on its corporate safety program and on all projects. Stanley delivers advice, counsel and training for all managers and supervisors, and has counseled senior managers, presented at company meetings, and submitted safety articles for company publications.

“I believe National and its Steel City Erecting division continues to serve as a model example of a company committed to safety excellence,” Stanley said. “It’s not enough to make safety a priority. Safety must become an inherent company value because priorities always change, and such a commitment always begins at the top.”

National and Steel City have built year-over-year growth and success fueled by the construction of turnkey Air Quality Control Systems (AQCS) required by various environmental mandates affecting the Power industry. The company has built an outstanding reputation for diverse mechanical equipment installation, including heavy duct, precipitators, SCRs and air-cooled condensers.

National and Steel City Erecting are proud to serve a broad cross-section of industrial customers, including: Bechtel, CIBA-Geigy, Fluor Constructors, Georgia Pacific, Georgia Power, Kimberly Clark, Kerr-McGee, Exxon-Mobil, IPSCO Steel and Siemens Westinghouse.

About National Steel Constructors

Building on marquee experience in more than 30 states nationwide, Plymouth, Mich.-based National Steel Constructors, LLC and its Steel City Erecting division is one of the nation’s leading steel and power industry equipment installation construction companies. Since 1998, National has consistently ranked in Engineering News Record’s Top 12 listing of Structural Steel Erection firms. National has built a history of specializing in managing major, complex, fast-track projects, including Air Quality Control Systems for power plants; airport facilities; aircraft assembly plants; arenas; automotive manufacturing plants; convention centers and steel mills. For more information visit www.nationalsteelconstructors.com, or call 1-800-ERECTOR.

Media Contact:

Jim Engineer

e-Rainmaker PR for National Steel Constructors, Steel City Erecting

Mobile: 630.728.1387 or jim.engineer@e-rainmaker.com

Specs and features: The Manitowoc Chopper took 175 hours to build and features a lattice boom with hook backrest, joystick handlebars, steel wire enclosed rims and a special gas tank. Don’t forget your camera to have your photo taken at our booth with this one-of-a-kind Chopper to share with colleagues, friends and family.

National Steel Constructors and its Steel City Erecting Division hold the ASME “R, U, and S” code stamps, and we are an AISC Certified Advanced Steel Erector.

Specializing in turnkey installation of Air Cooled Condensers, SCR systems, wet or dry FGD systems, precipitators, bag houses, material handling systems and power blocks as well as retrofit or modification of the same.

NSC has the ability to work nationwide and has developed a solid reputation through innovative solutions. For more information visit www.nationalsteelconstructors.com

National Steel Constructors’ Steel City Erecting Division completes construction, erection of SCR reactors and ductwork for the City of Lakeland.

National Steel Constructors Announces Record $60 Million Billings in 2008 – Dec. 2, 2008

Look for us at…

Booth C2-109
Las Vegas Convention Center
Dec 8th – 10, 2009