Mezzanine Floor Staircases
Part K Mezzanine Staircases
An Onorin approved inspector can advise on the regulations and show us instances where a simpler Type K staircase may be an acceptable alternative or situations where a single ADS may alleviate the need for a lift.
Approved Document Part K requirements:
- No restriction on rise between flights
- 400mm clearance between landings and door swing
- 190mm maximum riser
- 250mm going of each step
- Open risers
- 900mm wide treads
National Building Specification (NBS) Part K: Protection from falling, collision and impact.
