* One Piece Construction * White painted steel * Available to fit 4', 5' and 6' wide picture windows. * Designed to withstand the pressure from heavy clay/soil and aggressive back filling. * Designed and tested in conjunction with a registered structural engineering firm. * Available in 24" and 36" projections and 24" to 84" heights - all one piece steel construction. * Deep corrugation - strength to meet virtually any application. * Constructed of heavy gauge galvanized steel for outstanding durability. * Superior strength provided from deep corrugation. * Galvanized finish for maximum light reflectivity and easy post-construction clean up. * Heavy 3/4" rolled top edge for extra strength and safety. * Flat, pre-punched flanges allow easy attachment to walls and frames.