A self-anchored suspension bridge is a suspension bridge type in which the main cables attach to the ends of the deck, rather than directly to the ground or via large anchorages. The design is well-suited for construction atop elevated piers, or in areas of unstable soils where anchorages would be difficult to construct.
The main span of the eastern span of the San Francisco–Oakland Bay Bridge, the largest example of a self-anchored suspension bridge in the world.
The Three Sisters (Pittsburgh), the first self-anchored suspension spans, opened in 1926 to 1928.
Hutsonville Bridge cable anchor detail
Falsework
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Falsework consists of temporary structures used in construction to support a permanent structure until its construction is sufficiently advanced to support itself. For arches, this is specifically called centering. Falsework includes temporary support structures for formwork used to mold concrete in the construction of buildings, bridges, and elevated roadways.
Arch ring and falsework, 1932
Falsework centering in the center arch of Monroe Street Bridge, Spokane, Washington, 1911
Fabrication
Placement