How do I go north of Crawl Space North

Hint 1 of 7:

The wooden supports have something to do with it.

Hint 2 of 7:

The room is like a see-saw.

Hint 3 of 7:

Remove the beam in Crawl Space South.

Hint 4 of 7:

You need to add weight to one side to raise the opening.

Hint 5 of 7:

The piano will do it for you.

Hint 6 of 7:

Move it to the south wall.