Eli5 how do construction workers communicate the precise location of items to be moved , to the tower crane operator , is there a grid used to communicate position ?

Question

Eli5 how do construction workers communicate the precise location of items to be moved , to the tower crane operator , is there a grid used to communicate position ?

In: 3

Answer 1

Depends on what type of crane. There are hand signals for different types of cranes/boom trucks. Also there are radios to communicate the different maneuvers needed to position the hook and load where they need to be.