Descend the steps from the balcony to the workshop floor and search the bodies and lockboxes for items and money. Move south to the Cafeteria in search of additional items and another Audio Diary (in the kitchen). Keep your eyes open for other fuel cylinders and use Telekinesis to hurl them at the Splicers that appear.
A Splicer with a lead pipe has jammed the Deployment Bay Door located at the west end of the workshop. Head into the leaking restroom on the south side of the workshop and use Telekinesis through the broken wall to pull the pipe out of the gears. Continue through the other half of Workshop 6B to the door leading to the Switching Hub.
