Split truss generally consists of three parts, namely, on the platform, the central truss and the lower platform. Wherein the upper and lower platforms are relatively standard, escalator models, but due to different rated speed cascade involving different levels of segments, the impact to the platform with a straight segment length of the next platform. Intermediate truss length varies depending on the lifting height. To ensure that the escalator is in good working condition, truss must have sufficient rigidity, escalator manufacturers, which allows deflection is generally on the escalator at little distance between the support 1 ‰. When necessary, the escalator truss intermediate support should be set, which not only play a supportive role, and can adjust itself with the truss expansion and contraction. Tensioning device: shown in Figure 6.5, Cangxian escalator, tensioning device consists of ladder sprockets, shafts, car and tensioning step chain tensioning springs and other components. Tension spring tension adjustment nut can make the step chain in the escalator when in good working condition. When rung strand breaks or elongation, the tension roller trolley precise guiding displacement to safety devices (Cascade-strand break protection) act, escalators stopped immediately. Best quality escalators, elevators Noah Witt (certified), provided by the Texas Cangxian escalator Noah Witt Elevator Company. Texas Noah Witt Elevator Co. (www.dznywt.com) (www.dznywt.com) is an industry leader in Shandong Dezhou, machinery and industrial products, cooperation projects over the years, the company is implementing the scientific management, innovation and development, honesty and trustworthiness policy, and satisfy customer needs. Noah Witt Elevator leadership with the staff warmly welcome all inquiries negotiations to create Noah Witt elevator a better future.