Our steel fire rated door is made strictly in US standard. All hardware has the stronger reinforcements.
For example,
hinge reinforcement : 10GA (3.5mm)
closer reinforcement: 12GA (2.5mm)
lock reinforcement : 16GA (1.5mm)
strike plate reinforcement: 16GA (1.5mm)
The top, bottom and side closures are fabricated from 16GA (1.5mm) thick channel shaped steel sections welded to the front and back door skins. Flush top channel :16GA (1.5mm).
