In the Operations and Checkout Building is lowered toward a stand on the floor it will be moved to a horizontal position.

In the Operations and Checkout Building, the Joint Airlock Module is lowered toward a stand on the floor where it will be moved to a horizontal position. Then it will be lifted into the payload canister for transfer to the Space Station Processing Facility. There it will continue to undergo preflight processing for the STS-104 mission scheduled for launch aboard Space Shuttle Atlantis May 17, 2001. The Joint Airlock Module is the gateway from which crew members aboard the International Space Station will enter and exit the 470-ton orbiting research facility