The existing standard DIN 18065:2000-01 with this standard is reformed as regards its content and configured more user-friendly. The standard has been fundamentally restructured. Clause 6 "Main dimensions", Clause 7 "Tolerances" as well as the normative Annex A "Figures" has been written as a two-columned table. So the differences between "General buildings" and "Dwelling houses up to two flats and within flats" could be represented more clearly. Texts and/or figures applying for the two columns has been arranged over both columns without division. The standard is written in such a way that it can be taken over to the "Musterliste der Technischen Baubestimmungen" and introduced by the building authorities in every "Bundesland". This standard defines terms and definitions, main dimensions and tolerances for stairs in building. This standard applies to all stairs independent of material and construction type, e. g. for stairs with load-bearing bolts according to DIN 18069. This standard does not apply to other special fields as e. g. shipbuilding or machine construction. It does not apply to stairs according to DIN EN ISO 14122-3 "Safety of machinery - Permanent means of access to machinery - Part 3: Stairs, stepladders and guard-rails ". This standard does not apply to loft ladders (see DIN EN 14975) and not for escalators and not for outside perrons.