Article 6.2.2 of Code for Design of Library Buildings (JGJ 38-2015) stipulates that the maximum allowable building area of fire protection zones for basic stacks, special stacks, dense stacks and open stacks without automatic fire extinguishing system should not be greater than1500m2; ; Multi-storey buildings with building height less than 24m should not be greater than1200m2; ; Buildings with a height exceeding 24m should not be greater than1000m2; ; The basement or semi-basement should not be greater than 300m2.