Stair, has supporting surfaces formed between two step treads and step risers by pivoted joints that are extended in longitudinal direction of individual stages and tiltable perpendicular to stages, where step treads are made of wood

摘要

The stair has supporting surfaces formed between two step treads (1) and step risers (2) by pivoted joints that are extended in a longitudinal direction of individual stages and are tiltable perpendicular to the stages. One of the step risers with a lower longitudinal side (5) is supported on a rear longitudinal area (6) on a top side of one of the step treads. The step treads are made of wood and a side surface in the rear range is stationarily anchored with a carrying construction e.g. wall.