A crib should be disassembled to move, and reassembled exactly to its original specification, because it is a safety-rated product. Keeping the original hardware and instructions is essential.
Pro tip: Photograph the mattress-height setting before disassembly so you restore the correct level for your child age.
Watch out: Use only the crib original hardware and follow the manual exactly; a crib is a safety-rated product and improper reassembly is dangerous.