When specifying hardware for fire door assemblies, selecting a mortice lock is not merely a matter of function or aesthetics—it is a critical decision impacting the assembly's compliance and life safety performance. This leads to two fundamental questions: First, "Are mortice locks fire rated?" – A
EN1906 Grade 4 lever handle, category of use: high frequency of use on doors which are subject to frequent violent usage, e.g. football stadiums, offshore installations (oil rigs), etc.
