Requiem: stuck in sprinkler room

[Penumbra]

well, if you want there's an alternative to getting through there. Instead of going across thoes beams and doing that puzzle, you can jump down to the floor below and do a completly different puzzle, either way you end up at the same place.

There are 3 trap doors on the walls with crates in them, open all the trap door and put the crates directly under the 4 buttons.