SSD100 construction site of material hoist Adopts 4 cable wire ropes for heavy tractor with a vertical mode of transportation equipment, equip with YJ windlass as traction devices. It fits in the use of low-rise building construction, with anti-broken rope, anti-summit (over summit device) and so on. The hoist has a wide range of security protection devices, their safety in line with the National Construction hoist safety standards. This product can be divided by the volume of capacity into two trolleys, three trolleys and many other models.