What age for a top bunk?
Beds with a base higher than 600 mm are marked as not suitable for children under six. That is a warning, not a statement that six is old enough. Follow the maker if they set a higher age.
Topic
Safety
The under-six warning, mattress depth, guard rails, and what BS EN 747-1:2024 actually covers.
Bunk bed mattress depth and guard rails
A thick mattress lifts the child up the guard rail. The frame is marked with a maximum mattress thickness. A trade summary of BS EN 747-1:2024 says the mattress top should stay at least 160 mm below the top of the barrier.
BS EN 747: what parents need from the bunk bed standard
BS EN 747-1:2024 is the safety, strength and durability standard for bunks and high beds whose base is 600 mm or more above the floor. A listing that says “safe” is not the same as a test report for that model.