Staircase Element and Method for Building a Staircase

Abstract

The invention relates to a staircase element comprisinga tubular mast erectable to a vertical position onto the floor or a corresponding surface of a stair hall, and fillable with concrete;stair step elements fastened at their first end stepwise to the mast and branching off radially from the mast;at least one tubular stringer fastened to the second end of the stair step elements, fillable with concrete and connectable with fastening members to at least one wall of the stair hall, for supporting the stair step elements at their second end and for anchoring the staircase element to a building. The invention also relates to a method for building a staircase.

Description

PRIORITY[0001]This application claims priority of the Finnish national applications number F120155041 filed on Sep. 22 2014, and F120155041 filed on Jan. 20 2015, the contents of both which are incorporated herein by reference in their entirety.FIELD OF THE INVENTION[0002]The invention relates to a staircase element and a method for building a staircase.BACKGROUND OF THE INVENTION[0003]At present, staircases built up from elements are normally assembled from uncoated concrete elements having the height of one flight. After the installation of the stair elements of the staircase, the steps of the staircase are coated with a suitable surface material, such as, for example, a mosaic or stone surface. The other surfaces of the staircase are also e.g. skim coated and / or painted after the installation of the staircase elements.[0004]If the staircase is installed in an existing elevator or stair shaft, a foundation usually has to be made for the staircase to enable the installation of the ...

AI Technical Summary

Benefits of technology

[0005]It is an aim of the invention to provide a new type of a staircase element and a method for building a staircase, to avoid the above mentioned problems and to facilitate and accelerate the building of a staircase in an existing stair hall.

[0006]The aim of the invention is achieved, because the staircase element according to the invention is a prefabricated enclosed structure made of metal and coated before its installation, whereby concrete is cast in the cavities of the enclosed structure to increase the strength and the fire resistance, but the element is installed in the stair hall before the casting of the concrete, whereby its weight is so low that there is no need to construct a separate foundation, and the staircase element is also lighter than before and easier to handle during its installation. To put it more precisely, the staircase element according to the invention is characterized in what is presented in claim 1, and the method for building a staircase is characterized in what is presented in claim 9. Dependent claims 2 to 8 present some advantageous embodiments of the staircase element according to the invention. Dependent claims 10 to 15, in turn, present some advantageous embodiments of the method according to the invention.

[0007]The staircase element and the method according to the invention have the advantage that they make it easier and faster to install a fireproof staircase, because the staircase elements are, when installed, lighter in weight than concrete staircase elements of prior art, whereby there is no need to construct a separate foundation in the stair hall, and the installation of the staircase elements is easier because, among other things, the staircase elements can also be fastened to the walls of the stair hall during the installation. Moreover, the building of the staircase becomes easier, because the separate installation of the steps and the coating of the staircase can be performed before the installation of the staircase, in connection with the fabrication of the staircase elements.

Problems solved by technology

Moreover, it is laborious and time consuming to install heavy elements one by one and to fix them to each other.

In many cases, it is also difficult and slow to coat the different surfaces of the staircase in a stair hall which is often narrow.

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