What does the span S mean? On the electric block
It is one of the contents of the crane safety inspection to keep the running track of the electric hoist and the track of the trolley.
Electric hoist up the car to run the distance between the center line of the orbit, the ground rail arm crane running the distance between the center lines of the orbit are referred to as a track
The span of an electric block? It refers to the horizontal distance between the center line of the bridge type electric gourd.
