Irwin & Leighton, Inc.



The Boeing Company Helicopter Division
Ridley Township, Pennsylvania


New Engineering Laboratory Building  
± 125,000 SF Expansion
Architect:  The Sigel Group


Whirl Tower Containment Structure  
Structural Steel Containment Building for Helicopter Blade Testing
Architect:  Stone & Webster Engineering Corporation

© 2010 Irwin & Leighton