The K-span project is a new world and system of the metal ceilings ( of an arch shape( that are characterized by its speed installation and low cost. They are indispensable nowadays for they are used in - Establishing camps for armies & training. - Establishing hangars and sunshades for planes. - Using this system in covering large areas of stores, passages and swimming halls and sports halls. - Establishing car parks and stations, governmental bodies, ministries and houses. - Covering squares & places of gathering for school students. - Establishing houses for emergency lodging in emergency cases. - many other activities.