Staircase Width Minimum
The minimum recommended stair landing length is 36 or a length and width sufficiently greater than the swing of the door if a wider door is present.
Staircase width minimum. Some codes such as caosha specify a minimum stairway width of 24 35. Width refers to the length of risers and treads from side to side. If the stair width is more than the minimum specified width handrails are to installed in the stairs. Spiral staircases a spiral staircase may take up only half the room of a standard staircase and therefore it is useful where space is an issue.
Under staircase dimensions mistake ive come across several homes where this staircase design mistake has been made. For secondary staircases a minimum width of 600mm is recommended. So in the example above because the width of the staircase is 750mm the space at the top and bottom of the stairs must be a minimum of 750mm as well. The minimum recommended stair width is between 34 and 36 across the width of the tread.
The building regulations state that the width and length of a landing which constitutes part of the floor area must be at least equal to the smallest width of the narrowest flight of the staircase. Chapter 2 means of escape 21 general. However the recommended minimal with should be between 800mm and 1000 mm to allow not only to only climb that staircase with comfort but you can actually bring something up on it. In those instances ensure that stairs within the entrance storey of a dwelling have flights with a minimum stair width of 900mm.
Headroom is the vertical dimension from the stair treads to the ceiling directly above. For code requirements the minimum staircase width is the horizontal dimension between the sidewalls of a staircase measured above the handrails. The minimum staircase width is the same as the minimum circulation zone width of 3ft 091m. Storey should be a minimum of 125cm.
Clear width of exit doorcorridorstaircase number of unit widths 1m 2 15m 3 2m 4 where a fraction of 250mm or more are added to one or more full units. 3 diagram 211 1 example 1. There are no restrictions when it comes to width but standard flights measure 860mm and for a main staircase it is agreed that a width of between 800mm and 900mm works best. For dwellings 116 in exceptional circumstances where severely sloping plots are involved a stepped change of level within the entrance storey may be unavoidable.
A minimum width between handrails of 1000mm.