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Projects of NA 031-02-06-01 AK

DIN 14677-1 2023-11-27 Maintenance of electrically controlled hold-open systems for fire and smoke door assemblies as well as for electrically controlled hold-open systems for fire barriers in the course of ground-bound conveying systems - Part 1: Maintenance measures More  Comment 
DIN 14677-2 2023-11-27 Maintenance of electrically controlled hold-open systems for fire and smoke door assemblies as well as for electrically controlled hold-open systems for fire barriers in the course of ground-bound conveying systems - Part 2: Requirements to the professionals More  Comment 

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