A new method for installing precast stairs is helping to save money and speed up construction of multistory concrete buildings. Designed for both continuous flights and flights with intermediate landings, it uses braced steel frames to temporarily support the precast stairs. The frames leave enough clearance to permit immediate use of the stairs while the floor decks at top and bottom are being formed and cast. The stairs are precast either at a plant or at the jobsite using steel or wooden forms with a steel liner. Keyways and dowels at the top and bottom of the stairs are used to tie them to cast-in-place concrete floors and provide continuity. At the site, the stairs are flown into place by crane.