It is the backbone of many modern buildings and offer numerous advantages, such as high strength, flexibility of design and resistance to environmental factors. Spandrel beams, with brackets and other attachments at each end to connect them and have spandrel loads which act perpendicular to land lines. They support the load imposed by the building and external forces, making it possible to build applications with open floor plans or huge areas of window curtain wall system. Steel frames also go up in a snap, cutting down the construction period and attendant costs. Besides, steel is a renewable product whose material can be recycled. This contributes to a building's environmental performance.