Riser: 150mm – 220mm. (A maximum of 16 risers per straight flight)
Going: 220mm – 300mm.
Waist: 150mm – 220mm. (Depends on span and design load)
Width: 900mm – 2000mm. Landing units cast to suit layout of stairs.
Each stair flight has 4 threaded lifting sockets cast into the top of steps during manufacture. These will be required to be made good by main contractor after erection.