Take a left, walk straight, and take a right. Take a left and wait in the hallway.
Walk down the hall with the construction equipment. Take a right at the end of the hall. In teh hall take a left. Stop in the hall before you pass the vent on the left.
Walk into the unfinished hallway next to the staircase. Walk passed the construction materials and around the corner into the next hallway. Turn left into the hallway and walk towards he open door ahead.