The use of metal structures allows you to build thyroid houses of larger area and even two and those floor. In multi -storey buildings, stairs of various designs are built, which can contain both completely wooden elements and metal. When using a metal during the construction of the stairs, the steps are made of wood. In this case, wooden boards are attached to the corner or other structure using bolts. To do this, in the board, holes are drilled along the diameter of the fasteners and for the head make an additional expansion of the edges. In this case, the head goes into the thickness of the boards and, with subsequent putty, becomes inconspicuous.
