Conventional pre-cast concrete technology also plays a vital role to complement SNS BUILDING SYSTEMS. For example Prestressed Concrete Double Tees and Single Tees enabling clear spans of up to 25 meters to be achieved, precast concrete Foundation Systems, precast concrete Columns and Beams systems, all complemented by traditional precast concrete wall cladding technology to create a whole range of exposed aggregate architectural finishes much favoured in the Saudi Construction market, largely because of pleasing aesthetics and lack of long term maintenance requirement.