The Washington State Department of Transportation (WSDOT) designed and installed Service Level (SL-1) bridge rails on three treated timber bridges in the state. To date, there have been no accidents or maintenance problems reported at any of the modified bridges.
Traffic Barrier Systems Service Level 1 (SL-1) Bridge Rail, January 1987-August 1988
1988
14 pages
Report
Keine Angabe
Englisch