Most damage happens between the truck and the kitchen, not after.
Support it along its length
A slab is strong in compression and weak in the middle. Two people carrying a slab by its ends is how it snaps.
On site
- Carry it upright where you can.
- Never rest it flat on an uneven surface.
- Cut the openings before you move it into place.
A slab that is handled well arrives with its edges intact, which is the part nobody can repair.