Such as: 7-story unit-style residential buildings, any one of the building area of the unit are greater than 500 square meters, set up a closed staircase, the door does not lead to the stairs, the closed staircase door whether to set fire-proof door?
5.3.11 is to explain the situation can not be set to close the staircase, but if set, then it should comply with the provisions of 7.4.2, so do not consider, if it is closed staircase so that is willing to set B-level fire door of.
but if the contrary, must be set up closed staircase case, then see 7.4.2 in Article 2, closed staircase doors and windows set regulations, it must B Fire doors and windows.
You should be structured Article 5.3.11 of the first two, but you ignore the words, "when the door or leading to the evacuation walkway, staircase between the doors, windows for the B fire doors, windows , Can not set the closed staircase. " This specification has been very clear,
