Loosen the clamp head with a tightening crank by turning the handle counter-clockwise until it no longer turns.
Press the clamp-head release tab on the opposite clamp head and slide it away from the wood to disengage the entire pipe clamp.
Fit the clamp head with the tightening crank back onto the wood by centering the stock on the clamp.
Press the clamp release tab on the opposite clamp head and slide it to the wood until touching. Position the stock of the wood in the center of the clamp.
Inspect the final positioning of the pipe clamp. The pipe should run parallel to the clamped wood. Use a level if necessary.
Turn the tightening crack handle clockwise as tight as you can with only one hand.