These doors we’re installed in Duluth GA. The door is made of 25 gauge steel and they have windows and inserts. The arched inserts were chosen to play off the 45 degree corners (we call them dutch opening). The interior photo (sorry for quality) shows the back of the door which is also steel. This door is double reinforced with steel on front and back with the insulation incapsulated in the middle. Spring system is torsion springs (high cycle). You’ll notice a gap at the bottom of the door on the right. That is due to uneven concrete. We cannot fix the concrete but we can add a larger bottom seal to fill the gap.
Door: CHI 2283 W/ Windows and Inserts (Inserts give the design)