Snohomish Cantilever Sidewalk - Snohomish County, Washington

Location: Snohomish County, Washington

Project: 236th Street NE Safety Improvements

Product: Cantilever Sidewalk Bridge Decking

Overview: The Native Tribe of Stillaguamish improved 236th Street NE to make it safer for vehicles, pedestrians, and bicyclists. The corridor carries traffic from I-5 to the nearby Angel of the Winds Casino Resort.
 
The project created an illuminated shared-use path for cyclists and pedestrians. The walkway cantilevered off the south side of the bridge enables pedestrians and cyclists to safely pass over the fish stream without disturbing the wetlands ecosystem.
 
The 10’ wide x 417’ long cantilevered walkway was built using lightweight FiberSPAN™ FRP panels supported on steel beams spaced 10’ apart. The steel beams were anchored to a concrete ballast block. The 6” thick deck panels were designed for 100 psf live load. The typical panel was 10’ wide x 30’ long and weighed less than 4,000 lbs. Panels were cross-sloped to facilitate drainage; had a non-slip overlay and railings were mounted directly to the tops of the panels.