This specification is applicable to the structural design of the following masonry structures of building works. Under special conditions or with special requirements, the design shall be carried out according to special provisions. 1 Brick masonry, including fired ordinary brick, fired perforated brick, autoclaved lime sand brick, autoclaved fly ash brick, unreinforced and reinforced masonry; 2 Block masonry, including concrete, lightweight aggregate concrete block, unreinforced and reinforced masonry; 3 stone