Lighter spreader Under the premise of ensuring the rigidity and strength of the spreader, the structure adopts the single cylinder design of pull rod to optimize its self-weight to 6.8 tons, 1.2-2 tons less than the same type of spreader in the industry, 5% energy saving for heavy-duty operation and 18% energy saving for no-load operation. It will become the lightest heavy-duty container spreader in the world, which be entitled as China national innovation patent. Lighter Deadweight The overall weight of the ZHRS4531S is 61.5 tons, which is 8.3-10.5 tons less than the international conventional Reach Stacker, and the heavy-duty Reach Stacker ZHRS4540S -5&ZHRS4545 deadweight is 75 tons and 78tons respectively, which is equivalent to the industry conventional RS4531 Reach Stacker, but averagely 9-12 tons lighter than the competitors' equivalent model. Which could reduce the weariness to tires and double the usage lifespan of yard ground.