Stair tower is a structure that is easy to assemble from frame or modular scaffolding and aluminium stair platforms. Stair tower can be used to ensure access to adjacent scaffolding or be installed as separate structure that is anchored at the building, for instance, to make a passage to the roof of the building. The permissible load of stair towers by ALTRAD MOSTOSTAL is 2.5kN/m2.