... ! Straight cross-section or Variable Cross-section! 5) Bracing: X or V or other type bracing made from angle, round pipe, etc 6 ... thick, YX28-205-820(820mm wide), Sandwich panel with EPS, ROCK WOOL, PU etc insulation thickness around 50mm~150mm, width 950mm or ... 960mm! 8)Accessories: Semi-transparent skylight belts, Ventilators, down pipe, outer gutter, etc 9)Surfrace: Paint or hot dip galvanize ...