Cottage frame 3-4 floors with falling

#Kottag in Kiev ( already built) - 3 floors, with a floor and covered #terrasse on the 4th floor. Initially, two floors and a subway were planned. In terms of a four-hour with angles uneven 90 grad. On the monolithic g/b frame - columns, 250x400 balls, 120mm coverage and 150mm coverage. Walls - a full-weight 250mm rubber with a penopolyster 120mm. The foundation is a monolithic plate of 300mm. The walls were monolithic 200mm on the boronabytes in the body of the wall. All stairs are wooden stairs in the corners of two steel coats of a profile tube of 120x80mm.