I have seen a 15 Storey building where there are 2 exits located in the central core. To access the main principle staircase (which passes through the lift lobby) you pass the alternative fire escape which is on your right, through a FD30s, pass the lift lobby and through another FD30s to the principle staircase.
The alternative escape stairs, as mentioned is located just before on the right, through a FD30s. Both lead out to separate parts of the building.
From levels 1 and 2 there are 2 more alternative escape routes at either end of the property.
Thing is, the electrical riser is located on the door opposite the 2 fire doors which lead to their respective stairs.
Property was built in 1960's and is multi tenanted of approx 800. Obviously if the central core develops a fire, the floor where the fire develops is in trouble. Ensuring the x 2 stairs have a high standard of compartmentation is an obvious requirement.
My question is, what doughnut designed such a thing??