falseworks

Noun

falsework (usually uncountable, plural falseworks)

1. (usually) A temporary framework used in the building of bridges and arched structures in order to hold items in place until the structure is able to support itself.
   • Both steel and timber forms were used, supported on a falsework of steel beams erected on the new abutments at each end and on temporary piles which were driven into the river bed at mid-span.1955 February, “Notes and News: Construction of River Leen Bridge”, in Railway Magazine, page 140
2. (usually) Scaffolding, a temporary frame serving to support and brace a building under construction until it can stand alone.
   • ... the woefully incomplete Ferris Wheel ... was a half-moon of steel encased in a skyscraper of wooden falsework.2003, Erik Larson, The Devil in the White City, page 236