Ironmongery (buildings), Panic bolts, Bolts (security), Emergency exits, Doors, Fire doors, Safety devices, Closing and check mechanisms, Fire safety in buildings, Means of escape from fire in buildings, Hazard prevention in buildings, Buildings open to the public, Crowd safety, Design, Dimensions, Projections, Performance, Corrosion resistance, Environment (working), Durability, Strength of materials, Anti-burglar measures, Fire resistance, Instructions for use, Classification systems, Grades (quality), Marking, Designations, Mass, Installation, Performance testing, Mechanical testing, Release mechanisms, Force, Corrosion tests, Endurance testing, Quality control, Type testing, Maintenance, Security, Conformity