Monkeyboard

The derrickman’s working platform. As pipe or tubing is run into or out of the hole, the derrickman must handle the top end of the pipe, which may be as high as 90 ft (27 m) in the derrick or mast. The monkeyboard provides a small platform to raise him or her to the proper height for handling the top of the pipe. See double board, fourble board, and thribble board.