When Dismantling be unity of command, echoing up and down, motor coordination, when untie the knot with another person-related, you should notify the other party, may fall.
When tearing down the frame to unified command, up and down echo, action coordination, when untie the buckle related to another person, should first notify the other party, in order to prevent the fall.
When the scaffold is dismantled, unified command, up and down response and action coordination shall be carried out. When the knot related to another person is untied, the other party shall be informed first to prevent falling.