External escapes

[Seetek]

I am trying to locate the specific guidance for situations where external staircases are situated approximately 1.8m away from the building. The facades and exit doors are unprotected. Occupants at each level have to pass along a (1.8m) link section between exit door and stair. Which guidance allows this scenario? I can't see it in any CLG FRA guides, BS9999 or AD B. The guidance assumes the stair is attached directly to the building with the entire stair requiring protection below it. (This stair is also >9m with no weather protection.) In a fire occupants may need to travel along these unprotected links within the smoke plume. It is debatable whether the stair at 1.8m away from the building would be safe from smoke also with no protection to the facade. Any thoughts?

[Seetek]

OK as I received a resounding silence to my post, I guess I never worded it in a great manner. I was hoping someone might have seen a scenario where an external stair is as described. The facade is curtain-wall glazing - non-FR. Thoughts?

[AnthonyB]

It's been listed in fire safety guidance back since fire certificate days - but unfortunately lots of stuff slips through the net, both back then and now.

[Seetek]

Thanks Anthony, for coming back to me. I am aware of all the guidance back to the 'blue' book and 'red' book etc. Today with all the guidance available, I am at a loss how this has not been picked up. There are 4 such externals on my client's building and more than 10 such buildings on the site hence my reach out on here. I have asked then client to try and source the original strategy.