Roller shutter box has lateral reinforcements, as longitudinal rods bonded by bent rods in alternating V and inverted V shapes

摘要

The roller shutter box (1) has at least one lateral reinforcement (2,3) as a number of longitudinal rods (4-6) bonded together by bent rods (7). The bent rod has the shape of a V and an inverted V in sequence. The upper wall of the box has a grid reinforcement.