InTrans / Aug 14, 2018

Field performance of timber bridges: 13. Mohawk canal stress-laminated bridge

The Mohawk Canal bridge was constructed in August 1994, just outside Roll, Arizona. It is a simple-span, double-lane, stress-laminated deck superstructure, approximately 6.4 m (21 ft) long and 10.4 m (34 ft) wide and constructed with Combination 16F-V3 Douglas Fir glued-laminated timber beam laminations. The performance of the bridge was monitored continuously for 2 years, beginning shortly after installation. Performance monitoring involved gathering and evaluating data relative to the moisture content of the wood deck, the force level of the steel stressing bars, the vertical creep of the deck, and the behavior of the bridge under static load conditions. Furthermore, comprehensive visual inspections were conducted to assess the overall condition of the structure. Based on field evaluations, the bridge is performing properly with no structural deficiencies.