Drop down from the opening above the burning pool. Then climb onto the ledge near the broken ladder. Stand on the curved piece of debris and jump straight up to grab the twisted length of pipe overhead. Shimmy along the pipe to cross the pool. At the end, let go to land on the bent end of the catwalk.
Cross the catwalk, climb onto the fat pipe and walk across it to the opening you made. Drop into the room beyond.
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