Abstract: Method and apparatus for constructing buildings having multiple poured concrete floors using "flying" truss deck forms, the apparatus including shore jacks fixed to the deck supporting trusses and retractable above the bottoms of the trusses and extensible therebelow to support the deck form on the next lower floor, and including form -supporting dollies having caster-mounted floor engaging wheels and having jacks mounted thereon for supporting the trusses of the deck forms and for raising and lowering the latter and the method including a way of extending a truss beyond the outside edge of the building below the floor which it has just supported so that it can be rigged to a crane and "flown" to the next level to be poured.