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Iowa State University--Becoming the Best

Development of Design Criteria for Longitudinal Glued Laminated Timber Deck Bridges

Close-up of glued laminated timber deck

Close-up of glued laminated timber deck


Principal investigators:

Co-principal investigators:

Project status


Start date: 06/01/85
End date: 12/31/86


Sponsor(s): Weyerhauser Company

About the research

Abstract: Longitudinal deck bridges have the potential to provide a cost effective short span alternative. In the early stages of the bridge concept development, very little data existed regarding the design of these bridge types, although some experimental laboratory testing had been performed.

An analytical study was performed by Iowa State University to develop design recommendations suitable for the AASHTO Bridge Design Specifications. The analytical models, using finite element procedures, were validated using existing experimental data by others. The design recommendations focused on the load distribution of the deck panels based on common stiffener beam spacing, connectivity and geometry.