The document governing spiral staircase building regulations in the uk is british standard 5395 part 2.
Spiral staircase minimum diameter uk.
800mm 900 in scotland.
These spirals are designed to be used by individuals generally familiar with the stair and are classed as secondary or primary.
This document is summarised in the table below with categories given for each spiral application and the relevant maximum riser heights and minimum widths.
Stair balusters shall be spaced so a 4 inch object cannot pass between.
Approved document k requires that if a staircase design uses consecutive tapered treads they.
Minimum spiral stair tread width is 26 inches salter s code platforms start at 31 inches wide.
A secondary spiral stair assessing a loft basement or mezzanine will require a 600mm clear tread width.
0 in in diameter spiral staircases have 26 in.
Uk stockists of loft stairs spiral staircase kits modular staircases space saver stairs.
The irc stair code permits a 4 3 8 inch space.
Indoor and outdoor products.
This would be our 1448mm diameter.
This is a category b spiral staircase under bs5395.
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A minimum 2000mm diameter spiral is required to meet this 2100mm diameter in scotland.
Uk building regulations require a minimum clear width on each tread of 600mm for staircases serving one room only.
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Available in a range of materials including wooden and metal.
This states that a spiral serving 1 habitable room should have a 600mm clear width max rise of 220mm and centre going of more than 145mm.
For a main stair serving 2 or more habitable rooms you require a 800mm.
Established in 1966 spiral are the uk s longest standing manufacturer of high quality bespoke staircases and are leaders in the marketplace with a reputation for stunning design premium quality and highly skilled craftsmanship.
Spiral staircase diameter for domestic spiral staircases.
These spiral staircases are not suitable for use as staircases serving more than one room.
These spirals are available in 2 diameters 1400mm and 1600mm with clear widths of 607 and 707mm respectively.
In addition to a category a stair this private stair can also provide the main access to the upper floor of a private dwelling.
Minimum and maximum rise per tread.
Minimum going from the centre of the tread.
This type of spiral staircase is only available as a custom made option models such as the apollo and prisma are examples of this type of staircase.
Landing width shall not be less than the required staircase width.
Minimum clear width between core pole handrails.
This spiral staircase meets minimum 2015 irc requirements.
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Please review technical data sheet for additional information on measurements.
