The metal building is made up of metal tubing which includes trusses, bows, legs, nipples, sleeves, ridge caps, hat channels, purlins, L bracket, and the baserail. These buildings utilize 14 GA steel for tubing which is 2 1/2″ by 2 1/2″ thick. A thicker tubing material known as 12 GA is used which is 2 1/4″ by 2 1/4″ thick galvanized steel. The sheet material is 29 GA and some manufacturers offer 26 GA stronger gauge material.