photo.jpg

Any fire originating or extending to this area will spread rapidly. Failure of the 4x4 support posts is likely to result in collapse of the entire mass of concrete above. If the fire doesn't cause this failure, there is still the danger of the posts being dislodged by firefighters operating hose str...

Any fire originating or extending to this area will spread rapidly. Failure of the 4x4 support posts is likely to result in collapse of the entire mass of concrete above. If the fire doesn't cause this failure, there is still the danger of the posts being dislodged by firefighters operating hose streams or during overhaul. The weight of this mass of concrete and formwork collapsing onto the floor below could overload it, causing the floor below to collapse in turn onto the one below it, setting