Designed from historical record. 4" thick solid exotic timber. Hand hewn, tenon joined, solid full length timber (no fake laminates, scarf joints or glued-up parts) - full structural jamb with state of the art commercial standard seals. Solid hand forged wrought iron (no castings or hollow metals). Hand patina finished (no powder coating or faux paint finishes). Tempered thermal glass engineered to twice hurricane code world wide. Virtually maintenance free and guaranteed forever.