Completed a study of structural failure investigation and analysis for the existing aircraft service hangar. This metal hangar was constructed of tapered steel column and tapered steel rafters. Structural angles sections with Z purlins support roof decking and wall panels. Many structural members of metal hanger, buckled, twisted, warped or damaged due to high wind pressure caused by stormy weather. Structel engineers inspected visible damages, determined extend of damages, prepared recommendations to bring back the metal hanger to safe working condition in a timely manner and lowest possible cost. Existing metal structure was analyzed using state of the art computer analysis software, hand calculations and other inhouse computer applications. The metal hangar was originally designed per Metal Building Manufacturer Associations (MBMA) loading requirements. In addition to MBMA code, Structel checked the structural integrity of the metal hangar under International Building Code (IBC 2000) and AISC specifications.