The extension of the Casazza gymnasium was planned as a restructuring of the existing building, expanding the two sides necessary to guarantee regulatory dimensions. On the longest side a new grandstand has been placed, whose roof structure was made with lamellar wood ribs turned half-barrel and covered with a coverib covering. These ribs rest on the side facing the gymnasium to a structure consisting of a reticular beam supported by two external towers in c.a. and, to these, secured by a system of twisted steel tie rods.