The country has strict requirements for the production of burglar-proof doors. According to the anti-damage time, the safety grades of burglar-proof doors are divided into four levels: A, B, C, and D. Level A is not less than 30 minutes, Level B is not less than 15 minutes, Level C is not less than 10 minutes, and Level D is not less than 6 minutes.
Security doors are available in two materials: steel and stainless steel. The steel thickness of the door frame should be at least 1.5mm, the door leaf steel thickness at least 0.8mm, and the door weight typically over 40kg.
