Falsework

Falsework includes temporary support structures for formwork used to mold concrete[1] in the construction of buildings, bridges, and elevated roadways.

The illustrations are of modern pipe-column falsework, used to support the formwork for a post-tensioned reinforced concrete flyover connector for the eastern span replacement of the San Francisco-Oakland Bay Bridge.

When the supports are complete, wood beams and plywood or reusable metal forms will be placed, reinforcing and tenon conduits added, and concrete poured.

The new Sixth Street Viaduct in Los Angeles, California was cast on falsework and then hung on its network tied arch cables.

Soffit: Plywood sheeting for walking platform and surface to pour bridge against, typically on top of 4×4 lumber at specified spacing of 12".

Arch ring and falsework, 1932
Workflow on the Roman Limyra Bridge in Turkey: the falsework was moved to another opening as soon as the lower arch rib had been completed
Falsework centering in the center arch of Monroe Street Bridge , Spokane, Washington , 1911
Falsework parallel truss bridges temporarily supporting deck segment box structures
Overpass under construction over Interstate 5 in Burbank, California , in July 2021 [ 4 ] [ 5 ]
Sixth Street Viaduct Falsework - Bent 11 Jump Span. Shown in the background is a concrete Y-Arm.