InTrans / Aug 14, 2018

Design and field performance of a metal-plate-connected wood truss bridge

This paper describes an on-going study on the design and performance attributes of an experimental wood-truss bridge. This is believed to be the first roadway bridge application of metal-plate-connected wood trusses. Constructed in the Fall of 1992 on a rural Alabama road, the bridge comprises two spans: Span 1 is a bolt-laminated transverse deck supported by multi-truss girders and Span 2 is a stress-laminated truss system. A comprehensive monitoring program, initiated shortly after construction, is providing information on seasonal variations in lumber moisture content, stressing bar forces and overall bridge condition. This includes periodic static load testing. After
one year, the monitoring program shows the bridge to be performing as expected.