Wood is a popular material for attractive and durable stairs. There are different kinds of wooden stairs. Girder or wooden stairs usually have steps laying on a girder which is positioned in the middle; with frame stairs, the steps are held by a frame that runs down the side. Steps are fitted into appropriate slots in the frame. Alternatively, a groove is milled into the frame. The steps are clued to the frame and/or screwed in. Sometimes the steps are connected with risers inbetween the steps.
Modern, machine-produced wooden stairs are usually frame stairs that are produced as shown in the following procedure.
The rails for wooden stairs are frequently made of the same material as the steps and frames.
Dried timber in the shape of boards or decks. Alternative: Purchase solid wooden boards (in this case part procedure no. 1 'Board production' does not apply).
Most wooden stairs consist of a several centimetre thick layer of solid wood; often deciduous wood.
Alternatively, steps can be made out of wood composite board cores (ply or fibre wood; production see appropriate procedure), that are covered with a surface of another material (for example, a thinner layer of solid wood).
Solid wooden stairs are usually made of boards that have been made out of smaller, low on faulty parts, or perfect pieces of wood. First the used, dried wooden decks are cut into strips, the faults in the wood are cut out, and the smaller strips glued together to make large boards.
Stair producers usually buy the deck-shaped cut material in a dry state.
Often, the boards are glued together individually for a certain step or frame, ensuring as little waste as possible at the edges and achieving as good a look as possible. Alternatively, large boards are used that are bought from other producers. This procedure causes higher amounts of waste.