First, jump to grab the metal bar on the left.

Jump up to grab the valves above and move to the right until you grab the ladder (if you hang from the very right side of the bar, jumping up causes Lara to directly grab the ladder).

Climb to the top of the ladder and move to the right to grab the valves. Climb dioagonally upwards and to the right and jump straight up to grab the next set of valves above.

Move to the left, grab the ladder and climb to the top.

Wait for the metallic boxes to fall from the ceiling and move to the left to grab the valves. Jump up to grab the metal bar, then the next one above.

Finally, jump to grab the last metal bar and traverse to the left and around the corner; pull up.