Construction system

construction system with a girder reinforcement comprising bent diagonal strut and a bottom flange for a wholly or partially prefabricated ferroconcrete wall or slab containing at least one reinforcement mat the longitudinal bars of which are partially surrounded by the bent diagonal struts of the girder member, at least the bottom flange of which bears on transversely oriented mats, and formwork for producing double-skinned concrete components, more particularly of reinforced concrete, ceiling or wall slabs comprising two concrete skins situated at a distance from each other and connected to each other by means of the reinfocement, formwork surfaces associated with a formwork frame and having openings for the intermediate webs of the reinforcement or other connecting parts and supports for the formwork surfaces of the top formwork frame and with a double-skinned reinforced concrete slab for use as a vertical building wall exposed to bending stress, namely as an external wall exposed to soil pressure, in which the inner skin is shorter than the outer skin and serves to form a bearer for a horizontal ceiling slab and the reinforcement comprises steel mats disposed in both skins and girder members which interconnect the mats and the rising reinforcement of the inner skin projects above the top endface edge thereof approximately to the height of the top edge of the outer skin together with a reinforced, haunched concrete slab as well as with apparatus for aligning abutting prefabricated construction slabs with a transverse bar on one of whose ends there is mounted an internal longitudinal bar which bears upon the surfaces of two of the construction slabs and whose other end is provided with a longitudinal slot into which a wedge is driven approximately parallel with the internal longitudinal bar and bears on the other surfaces of the construction slabs and thus aligns them, together with a device for aligning prefabricated slab-shaped wall elements and a device for the thermal insulation of joints which exist between abutting double-skinned concrete slabs in which a thermal insulating mat bears on the inside of one of the concrete skins, characterized in that as regards reinforcement there is provided a lattice girder with only one top flange and one bottom flange (1,2) and at least one of the said flange bars is supported by a strut (11) extending transversely to the plane of the girder and extending to a longitudinal bar (7a) of the mat (8b) and that as regards the formwork two formwork frames (15,16) are separated from each other and are maintained at a distance by spacer feet (17) mounted on only one of the two formwork frames (15,16) and that as regards to double-skinned reinforced concrete slab the rising reinforcement (34) of the inner skin (33) is bent towards the outer skin (31) in the region of the horizontal top support edge (36) of the inner skin (33) so that the support edge (36) remains substantially undisturbed and extends approximately to the top edge (38) of the outer skin (31) and that as regards the reinforced haunched concrete slab each of its ends is provided with a slot (56) through which extends a tie bar (53) which interconnects both ends and at its own ends is anchored on the slab by means of an L-profile piece (57) one of whose members (58) bears on the top of the slab (39) and the tie bar (53) is connected to the other member (59) of the profile piece which bears on the end edge of the slab, also that with respect to the device for aligning abutting prefabricated slabs the inner longitudinal bar (67) is inserted into a longitudinal slot (68) of the transverse bar (66) and that in the device for aligning prefabricated slab-shaped wall elements a connecting bar (76) is inserted into a joint between two abutting wall elements (72,73) and the front end of said bar has welded to it a transversely extending retaining bar (77) which bears on one of the surfaces of the wall elements, that a board (79) is provided with an open hole (80) by means of which it is slid on the rearward end of the connecting bar and bears on the other surface of the wall elements and that a turnbuckle (81), which bears on the free surface of the board, is slid on the rear end of the connecting bar and that furthermore as regards the device for the thermal insulation of the joints the edges of the thermal insulating mats (99, 102) which are adjacent to the relevant joints (103) are profiled so as to produce a continuous reception space along the longitudinal direction of the joint (103), the profile of the outside (110) of said space being broader than on the inside (111) and that a bar (104, 109) of thermally insulating material with a profile corresponding approximately to the profile of the reception space is inserted therein.