Build wooden stairs yourself according to the regulations

Skilled craftsmen can build wooden stairs themselves. However, detailed planning is essential in order to comply with building regulations for stairs. The norms and rules help to achieve a safe and comfortable to use incline, step width and step depth.

Incline and treads

If you want to build a wooden stair yourself, you should read the binding regulations for stair construction. In addition to technical requirements, life-related factors also play a role. The minimum width, passage heights, clearance profiles, incline and the design of undercut steps for partially or two-spiral staircases and spiral staircases are defined.

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Based on the height of the entire wooden staircase to be bridged, the number of inclines must be calculated. As a guideline, you should calculate 18 centimeters per slope, which can, however, be undercut. A larger step height makes the stairs too steep and is not permitted under building regulations over 19 centimeters.

The standard for steps also specifies a minimum step depth of 26 centimeters. For the convenience of using the stairs, experts apply the formula of double the incline plus 25 centimeters of average foot measurement.

Stair width and railing requirement

In addition to the rules for inclines and treads, DIN 18065 specifies a minimum width of eighty centimeters for stairs. The general rule is that a handrail is required from three steps. This can be a railing or a structure attached to the wall.

The height of the banister must be at least ninety centimeters in private buildings. If the use of the wooden stairs by small children is to be expected, a handrail shape should be selected that makes it impossible to fall through and makes it difficult to climb over it.

Types of construction and stair wood

  • Central stringer staircase
  • Double staircase
  • Stringer staircase
  • Staircase with one or two turns
  • Spiral staircase

For spiral variants, the warping of the stairs must be graphically calculated during planning in order to meet the requirements for undercutting the stairs.

Soft and hard trees are suitable as the type of wood, from which the substructure and the steps can be sawn. Here too, building regulations regarding the strength and fastening of load-bearing parts must be observed.

Tips & Tricks If you build a wooden staircase yourself, have the plan approved by the responsible building authority. The rules can differ from one another in the individual federal states.