Multi-floor building structure

A multi-floor building structure comprising pillars (1), and one horizontal structure (5), made of engineered wood, for each building floor of the building supported on said pillars (1), each horizontal structure (5) including vertical through holes (3) for inserting the pillars (1) therethrough, wherein

• each horizontal structure (5) comprises an upper horizontal layer (10) and a lower horizontal layer (20) of engineered wood facing each other, and vertically separated and rigidly connected through an array of intersected longitudinal and transversal vertical ribs (31, 32) of engineered wood elongated in longitudinal and transversal horizontal directions (LD, TD);
• each of the upper and lower horizontal layers (10, 20) is made of horizontal engineered wood boards structurally adhered together providing structural continuity at least in the longitudinal and transversal horizontal directions (LD, TD) across the entire horizontal structure (5);
• the horizontal structures (5) include a collar reinforcement configuration in a collar reinforced portion (50) defined around at least some of the vertical through holes (3);
• wherein each collar reinforcement configuration comprises:
• a gradual or stepped increase, with the proximity to the vertical through hole (3), in the thickness and/or in the load-resistance per square centimeter of the horizontal engineered wood board constitutive of the upper and/or lower horizontal layers (10, 20), the horizontal engineered wood board of increased thickness and/or load-resistance completely surrounding one vertical through hole in a structurally continuous manner;
• and/or
• a gradual or stepped increase, with the proximity to the vertical through hole (3), in the thickness, in the load-resistance per square centimeter and/or in the proximity between successive longitudinal vertical ribs (31) laterally adjacent to the vertical through holes (3) in the transverse horizontal direction (TD), and between successive transversal vertical ribs (32), laterally adjacent to the vertical through hole (3) in the longitudinal horizontal direction (LD), intersecting to each other forming an array around the vertical through hole completely surrounding one vertical through hole in a structurally continuous manner.