Hi everyone, I wonder if you would be able to give me some assistance. In my current workplace I work in a shared 1960's office block building. This consists of a number of ajoining blocks with three floors. If I use one of the blocks as an exaple, it has three floors with a staircase at each end. On each floor there is a central walkway with offices on each side. Where the staircases are at each end there is a double set of fire doors that create a protected staircase. The offices on the left consit of a large open office where you can go in at the start of the corridoor and come out at the other end, but on the right hand side there are small individual office where you have to come out of the same door that you went in. My question is the office doors that open on to the central access route (main fire escape route on each floor) are not fire doors. I was always under the impression that doors that open onto escape routes such as the ones described above have to be fire doors, what is the correct answer? The way I see it is if there was a fire in one of the offices that open on to the escape route then it should be a minimum of 30mins fire protection.

In addition to the fire risk assessment, Building Regulations Approved Document B may provide the answer for you see: http://www.planningporta...br/BR_PDF_AD_B2_2013.pdf Section 3 talks about subdivision of corridors.