One year into construction, Sherwood’s Bicycle and Pedestrian Bridge over Highway 99W came to life in a matter of weeks when the bridge spans were installed this spring.

Bridge Span Assembly

Each of the five bridge spans is simply supported. This means that they are structurally independent and self-supporting. The upright tied arches and inverted arch trusses are all biaxially symmetrical and can be lifted from four symmetrically located points. These trusses were assembled on site and in the Thompson Metal Fab shop in Vancouver, WA prior to erection to minimize road closures and traffic impacts.

The first arch is welded together outside of the YMCA pool. Steel framing for the span 5 bridge deck is assembled along Sunset Blvd. The first arch for span 5 is lifted into place on a temporary shoring tower. The steel deck edge assembly features a smooth exterior fascia articulated by alternating diagonal connection plates…