CHICAGO--(BUSINESS WIRE)--LB Steel, LLC (d/b/a Concord Steel and Topeka Metal Specialties) announced that on October 18, 2015 it filed a voluntary petition for chapter 11 business reorganization in the United States Bankruptcy Court for the Northern District of Illinois, Case No. 15-35358, following an adverse ruling in a decade-long legal dispute with Walsh Construction relating to the construction of a canopy and curtain wall at the O'Hare International Airport. The company has been in discus