Abstract: An improved hurricane shutter is disclosed. The shutter is of the type in which a plurality of interlocking corrugated panels are attached between a header above the opening and a sill below the opening. The corrugated panels extend beyond lateral edges of the opening, so that they cover the entire opening. The hurricane shutter is improved with a reinforcement bar extending substantially parallel to and midway in between the header and the sill of the opening. The bar is additionally attached to the wall structure next to the opening. A concomitant method for improving the strength of a hurricane shutter assembly is also disclosed.