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首页> 美国政府科技报告 >Vehicular Impact Tests of Breakaway Wood Supports for Dual-Support Roadside Signs
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Vehicular Impact Tests of Breakaway Wood Supports for Dual-Support Roadside Signs

机译：双支撑路边标志的分离式木质支撑的车辆冲击试验

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Since the late 1960's the California Department of Transportation has used wood posts and timber poles, Classes 1-6, with drilled holes near the bases as breakaway supports for dual-support roadside signs. Due to the recent rapid increase in the lightweight car population, crash tests were conducted on these designs to determine whether they met current performance criteria. Timber pole supports are no longer used on new construction in California. A laminated wood veneer box section post 7 7/8 in. x 14 7/8 in. with saw cuts in the webs was impacted with a 2205 lb vehicle at 19.2 and 58.4 mph and met all test criteria. The design has been adopted as a standard in California.

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