Abstract: A protective shutter assembly for a roll-type shutter assembly. The shutter assembly includes a plurality of one-piece plate members pivotally joined to each other along adjacent edges. Each plate member has first and second longitudinal edges and an intermediate portion terminating in spaced ends and having a transverse cross-sectional configuration so as to allow approximately 50 mm of displacement of the intermediate portion when a 2?×4? wood object traveling at a 55 mph velocity impact against it. The plate member has a first hinge portion along the first edge thereof. The first hinge portion includes a first open-sided channel which opens to a pocket defined by hook. Each plate member also has a second hinge portion along the second edge thereof. The second hinge portion also defines an open-sided channel and a hook.