3rd Street Bridge — Local services in San Francisco

Top — 'Third Street Bridge' or 'China Basin Bridge'. It's a bascule (drawbridge) bridge, specifically a “heel trunnion” type bascule bridge. That means it pivots on a trunnion (bearing) at one end, using a counterweight to allow upward lifting of the span. It has four automobile lanes, sidewalks, and also supports bicyclists. There is a dedicated bikeway connection: a protected two-way bikeway connects across the bridge (and was added to close a gap in the bike network between the Bay Trail and Terry Francois Blvd). Designed by Joseph Strauss — the same engineer behind the Golden...

Cool bridge to see if it’s your first time like I am, or a designer of draw bridges. When ever the bridge is raised, an air raid...

This bridge is a bascule bridge and it crosses mission...