Although the floor void is deemed not to be a hidden void by virtue of the grilles placed within it we still divide the void up into the various air zones by means of fire barrier. The barrier is Rockwool RW4/80 100mm thick totally aluminium foil encapsulated rigid section rockwool, or if permitted by the district surveyor air segregation baffle described below is used. The barrier is placed along the lines of the stringers.
Although the floor void is deemed not to be a hidden void by virtue of the grilles placed within it
Although the floor void is deemed not to be a hidden void by virtue of the grilles placed within it |