Warped beam

not gonna happen, live with it or plane it square, or rectangle,
good luck with ideas.
rj in az

+1, you are not going to permanently straighten it without serious heat and a strong press. And if it was already kiln dried, even that won't work. Regardless, getting it perfectly straight is unlikely. You will have to mill it into smaller dimensions to straighten it.

EDIT to add: And when you mill it, it is very likely to warp some more as you release some internal tension.

There's no such thing as unwarping wood.
Look at one of the ends do you see the center of the tree.

Have you tried yelling at it yet?

Thanks for the replies. Doesn't sound like it'll happen, but think I'll try a steam pressure washer and park my excavator on it.

I think it started straight and warped under the load. Not sure if that makes a difference.

Thanks again

Should be an interesting project. Post pics!!