- DOOR LEAF
- Cold-rolled steel 1.5–2 mm, a one-piece bent construction with no welded seams around the perimeter. Vertical and horizontal stiffeners hold the geometry and prevent the leaf from being forced.
- INFILL
- Non-combustible mineral board and vibration-damping layers. They damp sound and stop the metal ringing on impact and closing.
- FRAME
- Bent steel section. The frame is anchored into the opening around the entire perimeter, after which it works together with the wall. It can be installed flush with the wall for concealed fitting.
- SEAL LINES
- Two or three seal lines, including a magnetic seal and an automatic drop seal that lowers when the door closes. The door keeps out smells, draughts and noise from the landing.
- LOCKS
- Two independent locks of different types, usually a lever lock and a cylinder lock. Both are high-security, with armoured escutcheons and anti-drill protection.
- DECORATIVE FACINGS
- 10–20 mm panels of moisture-resistant MDF or solid timber. Finishes: veneer, lacquer, metal, glass. The outer facing matches the building lobby, the inner one mirrors the interior doors and wall panelling.