What are the maximum custom sizes for your entrance portals, and how do you prevent sagging?

Our steel and cast aluminum entrance doors support custom single-leaf heights up to 3000mm and widths up to 1200mm. To bear the immense load of heavy casings, we integrate inner reinforced structural steel frames coupled with 3D adjustable concealed hinges and heavy-duty anti-sagging bearing alignment pins to keep field settlement within 0.5mm.