Del777il

Thanks Tom I appreciate the response. In the case where the natural vented smoke shaft continues to the basement lobby, is a vent at the head of the basement stairs also required as would normally be provided for upper floors as per para 2.26 ADB ? I cannot see how this could be feasabily provided.

What does it mean when ADB reccimends that in a single staircase building the staircase should not carry down to the basement rather terminate at Ground level and separate staircase follow down to the basement. Does it mean the basement staircase should be accessed from outside the building or can it be accessed from a door at ground level within the main staircase. Thank you.