What should a proper staircase in a house look like? How to calculate it yourself? How to determine the dimensions of the opening in the floor? What regulations should be followed?
SP 55.13330.2011 "Single-Family Residential Buildings":
Section 6 "Fire Safety", Clause 6.6
Section 7 "Safety during Use", Clauses 7.2, 7.3
SP 31.105.2002 "Design and Construction of Energy-Efficient Single-Family Residential Buildings with a Timber Frame":
Section 12 "Stairs, Ramps, Railings".
Link to the article of the same name on my website: http://xn----btbh9bhce.xn--p1ai/articles_/2017-02-02/lestnitca-v-dome-delaem-pravilno