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Building Regulations for Spiral Helical Stairs | British . . . The minimum clear width will again depend on the staircase category as shown below For reference, we’ve also included the minimum diameter of spiral staircase we would recommend to meet all these requirements
Building regulations for spiral and helical staircases Spiral UK have developed guidance on the standards for helical and spiral stairs in the form of British Standard specification sheets for the different categories of spiral and helical staircases
What Size Dimeter Do You Need For A Spiral Stair? A primary spiral staircase within a dwelling will need an 800mm clear tread width As the diagram below illustrates, the clear tread width does not refer to the radius – the centre column and handrails must be factored in to establish the actual diameter
Staircase Building Regulations UK - What You Need To Know The document governing spiral staircase building regulations in the UK is British Standard 5395 part 2 This document is summarised in the table below with categories given for each spiral application and the relevant maximum riser heights and minimum widths
Guide to Standard Spiral Staircase Dimensions (with Drawings) The minimum opening sizes for each common size of spiral staircase is listed below: Spiral staircase diameter of 3 feet 6 inches will need a minimum floor opening of 44 inches by 44 inches
Building Regulations for Spiral Staircases Our wider spiral staircase kit with a 950mm radius is compliant with a Category B – Private stair In addition to a category A stair, this private stair can also provide the main access to the upper floor of a private dwelling
Building Regulations for Staircases in the UK - Estairs Ltd Spiral staircases, for example, are subject to highly specific guidelines: Minimum tread width—measured as clear walking width on the narrowest part of the tread—must meet 600mm in domestic use or 800mm for common spaces