Reinforced concrete pipe / concrete offer, the steel tensile strength is very high, generally more than 200MPa, it is usually people with reinforced concrete and other stiffening material to work with them, take them by the tension of reinforced concrete to bear stress part. Reinforced concrete pipe / concrete offer when the applied load P, the upper beam compression, the lower tension. At this point configuration in the bottom of the steel beams bear the tension, while the upper shaded area shows the concrete under pressure. In some small cross-section components, in addition withstand tension, the steel can also be used under pressure, which usually occurs among the pillars. Reinforced concrete pipe / cross-section of reinforced concrete offer made according to project needs different shapes and sizes.