Abstract: Floor shuttering comprising a predetermined number of elongated forms having inverted U-shaped cross-section, said forms being mutually joined together along adjacent side edges and being arranged on inverted U-shaped support members, which are carried on beams extending perpendicular to the forms. Said support members being mutually interconnected by means of retaining elements extending at least in the space between opposite side-walls in the forms and the support members and further being carried by the beams, which are raisable and lowerable in a movable frame structure.