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

The Security Armor Door supports a maximum single-leaf size of 4,000 mm high × 1,800 mm wide (157.48 × 70.86 in). The Stainless Steel Door and Galvanized Steel Door each support up to 3,000 mm high × 1,080 mm wide (118.11 × 42.52 in). 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.