Railing infill

Supplementary information about our various railing infills.

Railing height

The height of the railing is 1100 mm at the front edge of the step. The handrail is placed at a height of 900 mm within the radius of the railing. The railing height of the landing is 1100 mm as standard.

Load, railing

The railing is dimensioned to withstand a load of 1.0 kN/m handrail.

Childproof

Childproof means that none of the openings in the staircase are permitted to be larger than 100 mm up to a railing height of 800 mm.

Handrails

As standard handrails are made of stainless steel tube, Ø 42 mm.

We have been using stainless steel handrails in our spiral staircases since 2003. We believe that it affords a number of customer benefits, not least that it results in a more beautiful product that has more of a quality feel. Combined with our modern production park, using stainless steel in our handrails also helps significantly shorten delivery times.

Many years of experience with a tried and tested method, as well as a favourable relationship between anode and cathode where rust has never reared its ugly head, make us completely confident that the relationship between hot-dip galvanized and stainless steel does not produce corrosion.

Stair treads

Supplementary information about the step type.

Staircase radius

The staircase radius is the dimension from the staircase’s centre to the outer edge of the handrail. Spiral Staircases JOS are made with a radius of 800-1300 mm. Within this range, standard radiuses fall on whole decimetres.

Rise

The rise should be chosen based on the given height between the landings. A suitable radius and the number of steps per turn determine the height of the rise.

The step rise should be between 160 and 220 mm. The lower the rise you choose, the deeper the step needs to be. The normal rise is about 170 to 180 mm.

The formula for the rise is 2 x h + w = 600 – 630 mm.

Number of steps per revolution

The step template on the right helps you plan the staircase solution and to determine the number of steps per revolution. The table below shows the tread depth along the path line for each radius and suitable riser heights.

You can find the step template at the bottom of this page or click here to go straight to our step template.

Right or left curved staircases

Weland spiral staircases are manufactured with right or left turns. Right turning staircase means that it curves to the right while ascending (centre tube to the right while ascending).

Headroom

The headroom on the stairs must not be less than 2000 mm. The height is measured between two points located directly below each other.

Measure from the top edge of the lower step’s nose to the lower edge of the landing’s (step) rear edge.

Distance to wall and tread depth

The external radius of the spiral staircase must be at least 50 mm away from walls. The tread depth is calculated along an imaginary path 250 mm from the radius.

Stays

The spiral staircase must be fitted with stays every turn (2.5 to 3 metres in height). This can be done using the step-off landing fixing. If the staircase has no step-off landing on each revolution, bracing must be fitted between the centre tube and wall using custom stays.

Attachment of landing

Use a suitable type of screw, taking into consideration the materials used at the attachment points.

Attachment base plate

Use a suitable type of screw, taking into consideration the material at the attachment point.

A base must be cast to fasten spiral staircases where there is no existing platform. Wind strengths, etc. must be taken into consideration when designing this. Note that attachment at the first step must also be done.

Generally speaking, the distance to the base plate from the wall must be at least the staircase radius plus 50 mm.

Fire resistance rating R30

We also offer spiral staircases with fire resistance rating R30. Specific dimensioning requirements should be stated in the request for quote document.