Non-composite impact-resistant structure

A structure resistant to penetration by wind-borne debris including

• spaced-apart parallel frame members;
• an inner sheath spanning the distance between said parallel frame members, said inner sheath comprising an inner cellular panel formed from
• a rectangular flat metal sheet secured to each of said frame members, in outboard relation thereto, and
• plural channels disposed outboard of said flat metal sheet and cooperating therewith to form plural parallel inner cells, said channels presenting coplanar inner crests spaced outboard from said flat metal sheet, coplanar inner valleys secured to said flat metal sheet, and inner webs connecting adjacent ones of said inner crests and said inner valleys;
• an outer sheath disposed outboard of said inner cellular panel and comprising
• corrugated panels having coplanar outer valleys extending transversely of and being secured to said inner crests, outer crests spaced outboard from said inner crests, and outer webs connecting adjacent ones of said outer crests and said outer valleys;
• marginal connecting means along the opposite longitudinal sides of said corrugated panels for securing one such panel side-by-side with another such panel;
• said corrugated panels cooperating with said inner sheath to provide passageways, each formed by (a) portions of said inner crests extending between adjacent outer valleys, and (b) the overlying outer crest and the adjoining outer webs;
• and
• plural reinforcing elements, one disposed within and extending through each of said passageways, and having a length substantially coextensive with the width of said inner cellular panel;
• whereby said reinforcing elements cooperate with said sheath and said outer sheath to provide a combined shear barrier and impact cushion which effectively absorbs the kinetic energy of impacting debris.