When specifying a bespoke staircase, the purpose of the British Standard is to improve the quality of products and systems. They act as a set of guidelines to ensure that the end product is safe for use.
As a specialist manufacturer, all products made by M-Tech Engineering complies with the relevant British Standard for that product whether it is a staircase or other bespoke fabrication.
In this instance, BS5395 Part 2 is relevant to the design and manufacture of spiral staircases and helical staircases. It provides useful guidance on the minimum and maximum sizes for various parts of a staircase. This also differs depending on the category of the stair, for example if it is for public or private use.
Small private stair
Intended to be used by a small number of people who are familiar with the stair. For example, in a house where the stair will be used often by the people living there. The guidance for this stair would not be suitable for use in a public setting.
Typical outside diameter: 1300mm – 1800mm
Rise: 170mm – 220mm
Min. inner going: 120mm
Min. centre going: 145mm
Max. outer going: 350mm
Min. clear width: 600mm
Private stair
Similar to a small private stair but also serving as the main way to access the upper floor of a private house.
Typical outside diameter: 1800mm – 2250mm
Rise: 170mm – 220mm
Min. inner going: 120mm
Min. centre going: 190mm
Max. outer going: 350mm
Min. clear width: 800mm
Small semi-public stair
Intended to be used by a small number of people in a public setting, such as an office, factory or shop. Those using this stair will typically be unfamiliar with it. A stair that serves as an access to multiple dwellings would also fall under this category.
Typical outside diameter: 2000mm – 2250mm
Rise: 150mm – 190mm
Min. inner going: 150mm
Min. centre going: 230mm
Max. outer going: 350mm
Min. clear width: 900mm
Public stair
Intended for larger numbers of people in a public setting. This category covers stairs that will often be used by multiple people at once, therefore this will be the largest.
Typical outside diameter: 2500mm – 3500mm
Rise: 150mm – 190mm
Min. inner going: 150mm
Min. centre going: 250mm
Max. outer going: 450mm
Min. clear width: 1000mm
Working with a British Standards compliant manufacturer
M-Tech Engineering can offer specialist advice and guidance in the design stage to ensure a compliant end product that exceeds your expectations.
With over 28 years of experience, we would be happy to discuss requirements and provide a quote for your next staircase, balustrade or bespoke metalwork project.
Contact us on 0115 979 4448, via email at sales@mtechengineering.co.uk or through our web enquiry form.