ADVANTAGES.
— Steel roof structures do not need complicated formwork, these not only save time but also money. The use of precast concrete prefabricated units can overcome these problems but it lead to other problem, such as heavy dead weight, difficult to transport.
— Steel roof structures give architects greater freedom of design and can lead to lower cost by prefabrication and standardization of component parts. Their use simplifies and speeds up erection on site.
— They are light in weight but high in strength.
— Complexity of design calculation
— Higher maintenance cost than concrete roof because corrosion is possible.
— Prefabricated steel elements are large in size and difficult for transport.
