Wood square known as the steel sleepers advantages: 1. material saving, group die soon: The Materials Science and Engineering, Southwest Jiaotong University conducted a test, I produced steel sleepers strength is the traditional wood Fang (5 * 10cm) 3 times, (10 * 10cm) 1.5 times the ordinary wood Fang conventional support spacing is 150-200mm, steel sleepers to reach 300-400mm, can save an amount of about 30% -50%, while when the set of die much faster than the traditional wood Fang. 2. save working materials: wood Fang universal rack pipe support spacing is 600-800mm, steel sleepers can reach 1000-1200mm. When steel sleepers, used frame tube, fasteners, can also save some backwater. 3. Construction of concrete forming beautiful, smooth: Because steel sleepers strength than ordinary wood Fang strength concrete when subjected to pressure, no distortion, so after forming the concrete to build a more standard geometry, higher flatness and luminosity. 4. Can be used repeatedly, saving wood and forest protection: steel sleepers can be reused continuously for more than 15 years. 5. The financial pressure is small: In case of shortage of funds, and use of non-disposable financial pressure, but borne by the rental units.