EN 14637 2007 64 e stf BRITISH STANDARD BS EN 14637 2007 Building hardware — Electrically controlled hold open systems for fire/smoke door assemblies — Requirements, test methods, application and main[.]
BRITISH STANDARD Building hardware — Electrically controlled hold-open systems for fire/smoke door assemblies — Requirements, test methods, application and maintenance ICS 91.060.50; 91.190 12&23