Spiral Staircase Building Regs
In situations where space is limited the diameter is at the discretion of the building inspector.
Spiral staircase building regs. All building regulation spirals must comply with the 100mm sphere rule i e there must be no gaps greater than 99mm anywhere on the spiral staircase. Nosing the edge of the tread which projects beyond the riser. This document is summarised in the table below with categories given for each spiral application and the relevant maximum riser heights and minimum widths. Building regulations building regulations make specifications regarding 3 key areas relating to spiral staircases.
Part k of the building regulations provides the guidelines for ensuring occupants or visitors to a house are protected against falling collision or impact. Spiral or helical staircase regulations part k of the building regulations provides the guidelines for ensuring occupants or visitors to a house are protected against falling collision or impact. The table below is for guidance only please check with your local planning authority for confirmation. The california code of regulations for commercial buildings for example allows spiral staircases to be used as an exit if the minimum tread width is at least 10 inches and if the inner radius of.
Stair balusters shall be spaced so a 4 inch object cannot pass between. Minimum spiral stair tread width is 26 inches salter s code platforms start at 31 inches wide. The document governing spiral staircase building regulations in the uk is british standard 5395 part 2. Spiral and helical stairs regulations.
1067mm diameter can have 1 extra victoria or plain baluster. Balustrading strength requirements balustrading for spiral staircases are subject to the same strength requirements as those used on normal staircases. Landing width shall not be less than the required staircase width. The rules within part k don t apply to spiral or helical staircase designs.
Design spiral and helical stairs in accordance with bs 5395 2. Building regs specify a minimum distance of 220mm to a maximum of 300mm. Building regs specify a minimum distance of 150mm to a maximum of 220mm. So if the client is ordering a scandinavian parisienne or a victoria 1067 or 1194mm it must have riser bars.
A 5 foot diameter or larger stair will provide this standard stair width. Domestic spiral staircases come under 2 aspects of the building regulations depending upon their usage primary stair for a main stair serving 2 or more habitable rooms you require a 800mm clear width 900mm in scotland max rise of 220mm and a centre going of 190mm.