(19)
(11) EP 0 617 180 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
17.01.1996 Bulletin 1996/03

(43) Date of publication A2:
28.09.1994 Bulletin 1994/39

(21) Application number: 94104407.5

(22) Date of filing: 21.03.1994
(51) International Patent Classification (IPC)5E04B 5/38, E04B 5/21
(84) Designated Contracting States:
AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE

(30) Priority: 26.03.1993 IT BO930122

(71) Applicants:
  • ONDAPLAST S.p.A.
    I-47020 Longiano, Forli (IT)
  • Maffezzoni, Delmo
    I-20075 Lodi, Milano (IT)

(72) Inventors:
  • Maffezzoni, Delmo
    I-20075 Lodi, Milano (IT)
  • Muccioli, Filiberto
    I-47020 Longiano, Forli (IT)

(74) Representative: Porsia, Attilio, Dr. et al
c/o Succ. Ing. Fischetti & Weber Via Caffaro 3/2
16124 Genova
16124 Genova (IT)


(56) References cited: : 
   
       


    (54) Products for the fabrication of floors with lightening box elements and floors made with these products


    (57) Box elements (4-104-204) made from extruded cellular sheets of polypropylene and/or other suitable waterproof plastic materials, filled if necessary, are disposed in the space between the metal lattices (3) projecting from the reinforced concrete slab (1-2) of a floor, and are fixed over the whole length of this space, with or without interruptions, and act as lightening elements. The box elements are downwardly open, are provided with transverse closing and stiffening walls (8) fixed by mortising and/or other suitable means and suitably distributed over the whole length of the said elements, which are preferably also provided with small lateral openings (7-10) which prevent the entry of the floor finishing casting but which allow the water to flow freely, so that after the setting of the said casting the floor no longer releases liquid components.







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