Staircase Information

Staircase Information

A staircase is probably an item you will purchase once in a lifetime, so we have prepared this brief guide to assist you through the process.

There is too much technical knowledge required to supply staircases online, and whilst they can be supplied remotely, some general knowledge is required.

If you do not work in construction, we suggest enlisting the advice of a builder, surveyor or architect to help you in choosing the staircase, along with our input.

Using this Staircase Website

We offer a wide range of different staircase styles in various materials and configurations so was a little tricky ‘pigeon holing’ them into a website.

The staircases on this site are divided into two categories ‘Spiral Staircases‘ and ‘Modern Stairs‘. The Spiral Stair section is then divided into bespoke, kit, commercial and spiral fire escapes with photos of various projects we have completed. A click on each one reveals a full page on each project with additional photos, technical specification and comment from our sales team. Of course there are cross-overs between categories, for example, many of the bespoke models are supplied in kit form and we supply many of the commercial spirals to domestic customers.

The Modern Stairs section focuses on our open and light straight, quarter and half turn staircases, basically every configuration but spiral. We have divided this into steel structure, timber structure and kit staircase again with photos of a number of staircases we have completed. Once more there are cross-overs between each range within the category so be sure to have a good look through all the projects listed.

We have spent many hours trying to get the website as user friendly whilst adding as many pictures / projects as possible. At the bottom of each product page you will see a contact us form which you can use to request a brochure or a quotation.

GETTING A STAIRCASE QUOTATION

Obtaining a staircase quotation (even for a basic off the shelf staircase) needs some input from our sales team, so you will need to get in touch by phone or email.

However, even the most bespoke staircases we offer are actually very straight forward for us to price.

They are priced per style, per step, and then vary with the type of materials required. At the bottom of each product page, the ‘contact us’ form has many options that contain the information we need to work out a price for the given model.

You can of course select as many quotations as you like, or indeed contact us directly and email over drawings (PDF or CAD), sketches, or photos to help illustrate your requirements.

Generally, we need to know the following when working out a price (see illustration below to see a visual explanation of each item):

  • The staircase model of interest
  • The shape of the staircase (spiral, straight flight , quarter turn or half turn)
  • The finished to floor to floor height (even an approximate will suffice with each stair priced per step)
  • The stair width or diameter
  • The location of any surrounding walls (so we can include any necessary balustrade on the stair or landing)
  • The material options for the treads and balustrade (i.e. type of timber for the treads and spindles or glass panels for the balustrade)

Feel free to call us 01794 522444 to talk about your staircase requirements or email us info@completestairsystems.co.uk .

You can also book a visit to our staircase showroom to discuss your project face to face, and see some of the models first hand.

Quotations generally take us no more than 48 hours to prepare and return.

drawing of staircase measurements

Common Staircase Measurements

A – finished floor to floor height (including floor finishes)

B – finished floor to ceiling height (including finishes)

C – Length of Stairwell opening (including finishes)

D – Depth of Stairwell opening (including finishes)

E – Pitch line of the staircase measured as an angle

F – Riser height (distance from step to step)

G – Going measurement (depth of step measured without overlap)

H – Outer diameter of a spiral staircase

Staircase Terminology

To help you understand this website and any subsequent conversations you have with us, this breakdown of the terms we use to describe the various measurements and elements of a staircase will prove beneficial.

Tread – The step you walk on.  Generally constructed in wood, steel or glass.

Stringer – The structures that support the stair.  Normally situated at foot level either side of the staircase. Mostly manufactured in wood or steel.

Spindle – The vertical member between stringer and handrail.  Manufactured in wood, steel, iron.

Balustrade Infill  – The description given to the void between handrail and stinger.  Generally ‘infilled’ by spindles or glass panels.

Handrail –  The hand support to one or both sides of a staircase.  Often constructed in timber or steel.

Landing Balustrade – The handrail/balustrade infill continuing around the stairwell void for protection.

Riser – The vertical height from step to step

Riser infill – Many modern stairs have open risers (gaps between treads).  This gap needs to be less than 100mm for building regulations.  We offer steel riser bars, timber down or upstands, glass or acrylic half or full risers or indeed a completely closed riser in timber.

Tread Going – The horizontal depth of each step when viewed in plan.

Staircase Going –  The total length of a staircase measured horizontally.

Clear Tread Width – The clear, unobstructed walking width from stringer to stringer / handrail to stringer etc.

Diameter – The overall, inclusive width of a spiral staircase

Stairwell – The opening in the floor where the stair will be situated

Landing Platform – The top step of a spiral staircase, generally level with the finished upper floor.  Normally triangular or square in shape.

Pitch Line – The measurement showing the steepness of a staircase.  The angle measured from the horizontal lower floor and an imaginary line running diagonally up the staircase touching the front of each step.

Floor to floor Height – The vertical height from one floor to the next.

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.

1
2
3
4
5
6
Spiral-Stair-3-D-view sketch
1

Centre Column

2

Top Platform – generally level with upper floor

3

Perimeter Handrail

4

Tread/ Step

5

Newel Post

6

Balustrade Infill – in this example spindles

spiral stair rotation sketch

STAIRCASE BUILDING REGULATIONS

If you are installing a new staircase as part of a new build, or installing a new stair to a loft conversion, your stair will need to comply with the current building regulations. If you are involved in either of these, it is likely you will have an architect involved who will design the staircase accordingly.

Of course we are on hand to advise on the correct rise, going, pitch and headroom for your staircase. Please be aware that even if you are fitting a stair and the local planning office is not involved, you might one day sell your house and it will probably be inspected by a surveyor.

All of our custom made timber and steel staircases are manufactured to comply with most recent building regulations, unless otherwise specified.

The modular kit staircases are all manufactured abroad where regulations are less stringent, and because many have adjustable components, they can physically be assembled in a way that contravenes the regulations. We therefore have to deal with each project individually to ensure the right components, accessories and sizes are ordered to comply.

Building regulations are there to ensure safe access from one level to another. The governing documents which set out the guidelines for staircase manufacture are Part K of the building regulations and BS5395 (for spirals and helical flights) in England and Wales and article 4.3 of the Scottish Building Regulations.

Complete Stair Systems Ltd will advise as much as possible but the overall responsibility of compliance lies with our client. We strongly advice obtaining approval for the staircase design from you local planning office before confirming your order.

Whilst the regulations layout certain points to adhere to, some building inspectors and certainly planning office have their own preferences.

The main domestic building regulations points to consider are:

  1. Maximum Rise Value – 220mm
  2. Minimum Going Value – 220mm (225mm in Scotland)
  3. Maximum Pitch of staircase – 42°
  4. Minimum headroom – 2000mm (for loft/secondary stairs a relaxant may be offered)
  5. Maximum gap between treads and between spindles – 100mm
  6. Stair handrail height above pitch line – 900mm
  7. Height of handrail on landing balustrade – 900mm minimum (check with planning office)
  8. Height of handrail on external balustrade – 1100mm
  9. Minimum clear tread width of a secondary spiral – 600mm
  10. Minimum clear tread width on a primary spiral – 800mm (900mm in Scotland unless handrails fitted to both sides – then 800mm)

Commercial Staircase regulations are a little more complex and vary depending on the use of the building, the type of staircase and how many people are likely to use the staircase.

Please call us 01794 52244 or email info@completestairsystems.co.uk for more information.

Downloadable copies of the relevant governing Staircase Building Regulation documents

Building Regulations Part K

building regulations download image link

Spiral Stair Regulations BS5395 (extract)

building regulations link picture

Scottish Staircase Building Regulations

image for link

Ready to Order?

If you have received your quotation and discussed the particulars of the staircase with the sales team and have made your decision, you will need to contact the office to confirm your order.

The deposit can be paid by cheques made payable to Complete Stair Systems Ltd, usual credit and debit cards (apart from American Express) or banker transfers. If you want to pay by bank transfer, please let us know and we will forward our bank details. If ordering a bespoke staircase we shall prepare the production drawings on receipt of the deposit. These drawings will then be forwarded for confirmation. We require a signed copy of the drawing returned to us before manufacture can commence. Production lead times commence upon receipt of the approved drawing.

Delivery

All our modula staircases are supplied in a palletised box and are delivered by a carrier equipped with a pump truck for offloading. Generally the transport company will contact you the day before to advise on an AM or PM delivery. Modula staircases take between 1 & 4 weeks for delivery depending on the model and number of accessories ordered.
Our custom made staircases vary in how they are delivered depending on the size and weight of the model. The timber staircases are supplied on a pallet as are the majority of the bespoke steel models, but some larger stairs have to be delivered by a truck equipped with a hoist crane. All our custom made staircases take between 6-10 weeks to manufacture.  Please be aware that production does not commence until drawings have been approved and any manufacture lead-in times quoted do not start until approval.
For further help and information please have a look at our terms and conditions or call the office.

View our Spiral Staircases
View our Modern Stairs
Visit our Timber Staircase Website
Visit our Kit Staircase Website

OUR STAIRCASE BROCHURES

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Main Company Brochure

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WF Floating Stair Brochure

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Model 500 Stair Brochure

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Model 71 Spiral Brochure

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Custom Made Spiral Brochure

Need some help? Send us a message.