Abstract: A method for constructing a concrete basin includes the steps of manufacturing concrete construction elements, transporting the construction elements to the construction site for the basin, joining the construction elements together to form a basin, and arranging covering on the inner side of the walls and bottom of the basin. The inner covering is arranged during the manufacture of the construction elements. The invention also relates to a basin manufactured with such a method and the elements to be used in the construction of such a basin. The basin can be a swimming pool basin or a pond basin. By first covering the construction elements on their inner side and then transporting them to the site and installing them the construction process can be better managed and the working time on site is shortened.

Abstract: A device for forming a walkable floor, for instance above a swimming pool, has elements that may be assembled to be movable between a first position, in which the floor is situated above the swimming pool, and a second position in which the floor is situated adjacently of the swimming pool. The elements are mutually separated by separating surfaces extending substantially transversely of the direction movement, and wherein the elements can be mutually coupled by couplings adapted to transmit pulling and pushing forces in the direction of movement, wherein the couplings are adapted to prevent a relative movement in the direction transversely of the direction of movement.