Abstract: Apparatus for supporting concrete formwork used in construction of multi-story concrete buildings, including a formwork shoring bracket and means for attaching the shoring bracket to a column in said building. The attaching means includes a support, in the form of a base and an arm extending outwardly from the base, and adjustable means received on the outwardly extending arm for mounting the shoring bracket on the arm. The adjustable mounting means includes a member affixed to the shoring bracket and having an aperture therethrough receiving the outwardly extending arm and generally conforming to the configuration of the arm. The adjustable mounting means also includes means for releasably holding the mounting means at predetermined positions along the outwardly extending arm.