Basic question...

Office corridor, MoE one end and at midway point, meaning there is a dead end of maybe 12 metres. Four or five offices along the dead end. The two remedies I understand however, do you extend the solution the full length of the corridor or just within the dead end area to the midway point MoE? So for example detection on all office along the full length of corridor or just offices in the dead end part of corridor?

Thanks,

If there is a cross corridor FD30s door across the corridor at the point the dead end starts then I would consider it meets the guidance.  Anywhere the corridor  has an alternate MoF escape and is within the travel distances then fire doors would not be required.