Any manufactured products, including stairs, need certain regulatory requirements, the implementation of which will guarantee the client long -term and safe use of the produced goods.
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Among such requirements for the manufacture of the stairs and its subsequent operation, a number of the most significant. In particular, TU and GOST obliges not to exceed the slopes of the stairs in the living room by more than 45 °. Named in the standards, also the lower staircase of the staircase – 38 °.
Attic staircase have a range of 64-75 °. The main staircase for a residential building should not have a width, which is less than 85 cm. A staircase with three or more steps should have such a staircase element as a railing (0.9 m or more). The norm also provides for the installation of a prefabricated handrail. This fence of the stairs must be done when the steps have a length of more than 1.2 m. Similar stairwells, like steps, are also regulated by its size. Here height is about 0.21 m, and the width is not more than 0.23 m. It is clear that the staircase of more than a two -story house cannot be made of combustible material. Wooden stairs are not suitable here in any way.