3.1.10.4 Parapets

 3.1.10.4 Parapets

1) Except as permitted by Sentences (2) and 3.1.10.3.(2), a firewall shall extend above the roof surface to form a parapet not less than

a) 150 mm high for a firewall required to have a fire-resistance rating not less than 2h

b) 900 mm high for a firewall required to have a fire-resistance rating not less than 4h

2) A firewall that separates 2 buildings with roofs at different elevations need not extend above the upper roof surface to form a parapet, provided the difference in elevation between the roofs is more than 3m.

Question:

What will you be looking for to determine if a building is separated by a firewall?

Please leave your answer by comments.