Bed disassemble question.

[CSoliz]

I want to take the bed completely apart. I have taken all the wood out and took care of all the rusted nuts and bolts that held all the strips and wood in place. But before I take out the cutting wheel I want to make sure I am correct. would I be safe in assuming that I need to cut the welds at the rear of the bed that hold the cross piece to the bed sides?

Some pics:

I removed these bolts all ready:




Now, do I need to remove these welds?





Thanks for any help.