Abstract: A device for a gangway construction is described, which is characterised in that it is composed of a number of sections, each comprising a polygonal frame, one connected to the frame formed as a landing, and a gangway, the one end of which is hinge-connected to the frame/landing while the other end is set up to rest against the frame/landing of an underlying frame, and the construction is arranged to be readjusted between a folded position where the sections are lying on top of each other, as in a stack of frames, with each gangway inserted in the frame, and an active, using position where the frames are set up a distance apart so that the gangways form a suitable angle between adjoining landings/frames. Also described are a section for building a gangway construction, a railing construction and also applications of the invention.