Notched Trusses Give Low-Cost Conversion of Hangars for Jumbo Jets

by Edward H. Strand, Struct. Engr.; The Austin Co., Cleveland, Ohio,
Stephen H. Barnes, Manager; Design and Engineering, Austin-Deutschland, Frankfurt, Germany,


Serial Information: Civil Engineering—ASCE, 1980, Vol. 50, Issue 6, Pg. 88-90


Document Type: Feature article

Abstract:

Physically notching the structural members in a hangar roof solved the problem of moving new DC-10 aircraft into and out of maintenance hangars built for smaller, earlier-generation commercial aircraft. Newly developed computer programs permitted simulation of loading conditions on the structural members as the lower chord of each truss was notched, and accurate prediction of deflection in the trusses. Load transfer was accomplished by prestressing the bottom chord of each truss to zero stress condition in the cut area, cutting the chord and slowly releasing the prestress for gradual stress transfer to the relocated members.

Subject Headings: Trusses | Prestressing | Load transfer | Load factors | Aircraft and spacecraft | Structural deflection | Roofs

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