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Staircase Kits > Advice & Downloads > Technical & Installation Info & Downloads > Oak90 Modular Staircase Kit Technical Information

Oak90 Modular Staircase Kit Technical Information

Staircase Kits > Advice & Downloads > Technical & Installation Info & Downloads > Oak90 Modular Staircase Kit Technical Information
The Oak90 Modular Staircase kit can be installed with a clockwise or anti-clockwise turn using the quarter turn set of treads. You decide when you fit the staircase!
It's also available in a straight flight.

Generally, it is best to form the opening for the staircase at least as big as the staircase layout itself.

The standard kit has 13 risers (12 treads) and the tread rise is adjustable from 170mm 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 3030mm (or 2850mm to comply with UK Building Regulations for maximum tread rise). If your floor to floor height is higher than this, you simply need to add additional tread kits as required. If your floor to floor height is lower than this, you use less treads. See the Accessories page for more information.

The individual tread rise and going is achieved by adjusting the central tread support modules 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 going or depth of the treads is adjustable on the Oak90 staircase from 180mm to 220mm but the UK Building Regulations require a minimum tread going of 220mm and your chosen configuration should bear this in mind.

The design of balustrading on the Oak90 features vertical powder coated steel spindles. As always, with any of the staircases which are made in Europe, we would strongly suggest that you discuss your project with your local Building Control Department for clarification.

Powder coated steel riserbars are available as an accessory kit to fit between the open treads to satisfy the requirement for the gap to be less than 100mm.

Click here to download the Oak90 DATASHEET for more information [pdf file 465KB]

Delivery timescales are approx 10 working days.

Oak90 Modular Staircase General Details


Oak90 Staircase :: Datasheet Download

Oak90 Staircase :: Datasheet Download

Ref: 990

Oak90 Staircase :: External Balustrade

Oak90 Staircase Riserbars

Oak90 Staircase :: Support Pole

You will probably have noticed that there is a support pole shown in some of the images. This type of vertical support post is required for all of these modular staircase designs, mostly to dampen excess spring.

It's usually fixed underneath treads 5 - 7 but the layout diagrams in the installation instructions will show you where to fit the support pole for each of the configurations. The pole can be fixed down into the ground (it simply stands down on to the floor) or it can be fixed laterally into an adjoining wall as shown below.

Oak90 Staircase Fixing Points

The Oak90 Modular Staircases have a base fixing plate which bolts down into the floor. The kit includes fixings for concrete floors and, if you are fixing down into a timber joist, you will need to purchase the correct fixings for this. The base must fix into a solid and sound floor/support.

The top tread is set one rise down from the finished upper floor level. It has a fixing plate which fits against the side of your upper floor and bolts into the joist on the side of the floor opening. The top fixing plate must have a substantial and sound joist to fix into. There is a cover plate supplied with the kit to fit over the top fixing plate. The top fixing bracket is 250 x 340mm.

Staircase Kits | Advice & Downloads | Technical & Installation Info & Downloads |  Oak90 Modular Staircase Kit Technical Information

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