Spiral Staircases

Complete Stair Systems have an unrivalled selection of spiral staircases for domestic and commercial applications across the UK.  These range from basic DIY kit spirals systems to more custom made models with glass and stainless steel, all in a variety of heights and diameters.  We have been suppling new builds and refurbishments with ‘focal point’ access solutions across the UK and Ireland since 2005.

Spiral Staircases have been used in construction for over 3000 years.  The initial concept of a spiral staircase was one of safety and defence and were commonly used in the Middle Ages in castles and forts.   Their twisting nature put attacking armies at a disadvantage by not being able to flood the building with soldiers.  They were built in a clockwise assent so a right handed, sword wielding intruder would struggle with the centre column whilst a solider defending the castle would have more room to manoeuvre.  These early spiral staircases would also have uneven steps both in height and depth, again to outwit unwanted intruders.

In more recent times spiral stairs and helical stairs are associated with elegance, style and ergonomic design.  Being an architectural centrepiece, they are located in many of the world’s most iconic buildings and remain a very space saving solution when accessing an upper level.

Choosing your Spiral Staircase

We have divided our range into 6 different models / categories, each with its own characteristics, different diameters and material choices.   To work out a price for any of our spiral staircases we need to know a floor to floor height and diameter along with the model of choice and an idea of materials you would like to use.  Don’t worry if you don’t have a 100% precise height or are unsure about the diameter or indeed have still to make up your mind about the materials – each spiral is priced per step and we can give different treads or balustrade options within the price.  It is all very easy!

Have a look at the models below and fill out the enquiry form on each page.  We have an extensive case studies portfolio and gallery section for inspiration to help you choose your feature spiral staircase.

Spiral Type – Custom Made

Diameters – Custom Made

Application – Primary Domestic, Secondary Domestic, Small Commercial

Treads – Beech, Oak, Ash, Maple, Walnut, Birch

Spiral Type – Custom Made

Diameters – Custom Made

Application – Primary Domestic, Secondary Domestic, Small & Medium Commercial

Treads – Steel, Beech, Oak, Ash, Maple, Walnut, Birch, Glass

Spiral Type – Custom Made

Diameters – Custom Made

Application – Primary Domestic, Secondary Domestic

Treads – Laminated Glass or Acrylic

Spiral Type – Custom Kit Staircase

Diameters – 1100mm, 1200mm, 1300mm, 1400mm, 1500mm, 1600mm

Application – Secondary Domestic

Treads – Beech, Ash or Oak

Spiral Type – Custom Made

Diameters – Custom Made

Application – Primary Domestic, Secondary Domestic, Small & Medium Commercial

Treads – chequer plate or non slip steel plate

Spiral Type – Off the shelf Kit Staircase

Diameters – 1100mm, 1200mm, 1300mm, 1400mm, 1500mm, 1600mm (varies with model)

Application – Secondary Domestic

Treads – Steel, Beech, Ash or Oak (varies with model)

Contact us about Spiral Staircases

Understanding Spiral Staircases

There are several characteristics that one needs to be aware of when planning and purchasing a spiral staircase.  The image to the right highlights several  elements of a spiral but it is the geometry which sometimes confuses.

Any questions about diameters, stairwell opening, entry and exit points and materials, please call 01794 522444 or email info@completestairsystems.co.uk.  Don’t be too concerned about the technical elements of a spiral – we look after all of these for you.  The following is merely to provide some guidance.

What Diameter of spiral do I require?

The guidance on diameters are set out by a British Standard 5395 part 2.  This document divides spiral staircases into 5 categories depending on their usage and sets ‘clear tread width’ requirements for all.  This in turn dictates the overall diameter.

A spiral accessing a loft space or a non habitable room in a house (category A) requires a clear tread with of 600mm.  With the centre column and handrails to both sides this works out to be an overall diameter of 1400-1500mm depending on the spiral model.

A spiral acting as the main stair in a house (category B) requires an 800mm clear tread width (900mm in Scotland) which is around an 1800-1900mm outside diameter.  Understandably,  commercial spirals require a larger tread width which is determined by the number and type of person likely to use the spiral – staff or public or both.

Our blog post ‘What diameter Spiral Staircase do I need‘ goes into a little more detail.  The overall decision of the diameter of the spiral will rest with the building inspector involved with the project.

What size of stairwell do I require for my Spiral Stair?

If you are creating a circular or square hole in the floor you need to know the size required. Simply add 100m to the size of the diameter of the spiral you are proposing.

If you are installing a 1500mm diameter for example, the opening in the floor should be 1600 x 1600mm or 1600mm diameter. These are minimum figures of course and these dims should take into account any finishes around the opening like plasterboard. This is to allow sufficient knuckle gap around the perimeter handrail so you don’t pinch your figures as you use the spiral as the handrail passes through the floor.

There are a few tricks to reduce this ‘plus 100mm’ rule but it depend on the model, the diameter and the location of any walls. For a little more information on this please have a look at our blog guide on ‘What floor opening do I need for my spiral stair‘.

Entry and Exit points.

One of the most common questions we get asked is “where does the spiral start and finish”. The rotation of a spiral staircase is determined by

  • The floor to floor height (which specifies the number of treads)
  • The diameter of the spiral (smaller diameters generally have a larger tread segments)
  • The shape and size of the top platform
  • Building regulations (they stipulate a minimum tread depth (going) and maximum height (riser) of each step

Spirals are designed to the building and the layout within. Designers take into consideration the flow of the building and how the spiral is most likely to be approached downstairs and upstairs. Generally a spiral has to start downstairs in a certain position or the upstairs platform has to be located in a fixed position. If you take one of these fixed starting points, the rest of the spiral will spin around and using the step depth and heights set by the building regulations, will end up where it ends up. The two images on the right show a plan drawing of a typical 1500mm and 1800mm domestic spiral with a normal floor to floor height.

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Spiral-Stair-3-D-view
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Centre Column

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Top Platform – generally level with upper floor

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Perimeter Handrail

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Tread/ Step

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Newel Post

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Balustrade Infill – in this example spindles

spiral stair rotation