Rotate the operating direction signs to match how they are marked in the layout plan.

   For spans under 10 m only: Attach operating direction signs for the crane and trolley under the middle of the main girder.

   Only for spans greater than 10 m: Attach operating direction signs for the crane and trolley to the left and right, in each case 2.5 m away from the end carriage and end of the main girder.