Glass selection: glass thickness determined by calculation, and should not be less than 5mm.  Safety glass (tempered glass or laminated glass) must be used for mosquito net in aluminium window in the following parts of the building:  

(a) windows on the 7th floor and above;  

(b) window glass with an area of more than 1.5㎡;  

(c) The bottom edge of the glass from the final decoration surface is less than 500mm French window;  

(d) sloping roofs with a horizontal Angle of less than 75° and sloping windows more than 3m from interior floor;  

(e) framed glass doors with glass area greater than 0.5㎡;  

(f) Frameless glass doors shall be made of tempered glass of a thickness not less than 10mm.