(10) US 2013/0232887 A1
(22) May 5, 2011
(43) Sep. 12, 2013
(57) The assembly of prefabricated elements to form a prefabricated building with two stories includes: a prefabricated hollow structure (W) formed by portions of the walk floors of the ground floor and of the floor above (M, N) permanently connected to one another by portions of transverse walls (I) of the ground floor, and a prefabricated portal structure (V) formed by a central portion ( 0) of the roof floor of the upper story connected permanently to two portions of transverse walls (L) of the same story, the portal structure (V)...