Klan General Technical Information
The Klan Spiral Staircase kit can be installed with a clockwise or anti-clockwise rotation. You decide when you fit the staircase! The choice of four diameters - 1200mm, 1400mm, 1500mm and 1600mm, should suit almost any project.
Please note that the ceiling opening size should ideally be 100mm (4") larger than the diameter of the staircase to ensure that you can use the handrail safely as you travel up the staircase.
The standard kit has 13 risers (12 treads + 1 landing tread) and the tread rise is adjustable from 210mm to 235mm, although UK regulations have a maximum tread rise of 220mm. This means that the standard kit will suit floor to floor heights of up to 3060mm (or 2860mm to comply with UK Building Regulations). If your floor to floor height is greater than this, you simply need to add additional tread kits as required plus any additional shorter centre poles as required. PLEASE REFER TO THE DATASHEET IF YOUR FLOOR HEIGHT IS NOT WITHIN THE STANDARD RANGE TO CHECK IF YOU WILL REQUIRE ANY ADDITIONAL SHORTER CENTRE POLES.
The individual tread rise is adjusted by adding ingenious shims between each tread to provide your overall correct staircase height. These are supplied in the kit, together with all fixings and fittings required plus clear installation instructions and an installation DVD!
The gap between the vertical spindles on the balustrading of the Klan spiral stair 1400mm and 1500mm diameters is less than 100mm to satisfy the Building Regulations' 100mm gap rule. The clear tread width of the 1500mm diameter Klan spiral stair satisfies the requirements of Building Regulations BS5395 Part 2 Category A making it suitable for accessing a single bedroom loft conversion. We recommend that you check the details with your local Building Control Department before committing to purchase any staircase. Matching powder coated steel riserbars are available as an accessory kit to fit between the open treads to satisfy this same requirement. See the Accessories Pages for more information.
The landing tread on the Klan spiral stair is supplied oversized to be cut down as required on installation. (Click for larger image)
Klan Spiral Staircase Centre Pole Chart
To remain within UK Building Regulations, the standard Klan spiral staircase kit will fit floor heights of between 252cm and 286cm. (The standard staircase kit can, in fact, fit a floor height of up to 305cm but this will result in an individual tread rise which is too high for UK Building Regulations.)
If your floor to floor height is below 252cm or above 286cm, you may require to purchase additional shorter centre poles for the staircase to work. Please refer to the Klan Spiral Stair DATASHEET download [pdf file 182KB] for details. Please note that this datasheet does not take UK Building Regulations into account. If you would like any further details, please give us a call.
Click on the image above for a larger version to demonstrate when you may need to include one or more shorter centre poles with your order.