A Category A small private spiral stair is intended for use by a limited number of people who are generally familiar with staircase. For example, an internal stair in a dwelling serving one room not being a living room or a kitchen, an external access stair to an office not used by the public, or spiral fire escape stairs for a small number of people.

A Category B private stair in addition to a Category A stair can also provide the main access to the upper floor of a private dwelling.

You can find out more about how our staircase kits are Building Regs compliant on our Building Regulations page.

This determines which way you walk up the stair and where you step on and step off it.

It may be helpful to review our Technical Layout Diagram to determine where the exit will be.

If the ground is stable and you want to see the base plate to the stair choose above finished floor level/ground level. If the ground is not load bearing you will need to cast a footing in concrete. This would normally be below the ground or finished floor level and infilled to hide the fixings. If cast below ground level an additional column spacer is required.