747 has tilt sensors in each truck plus the nose gear air/ground. Once you're on the ground and deploy ground spoilers, everything is going to come up, you're not worried about the crosswind.
Maybe you're not worried, but as a 747 Captain,
I am worried!
There is still significant control authority available after ground spoiler popup in the 747, including ALL the aileron and rudder travel. Heavy crosswinds CAN pick up a wing after landing, so the handling pilot MUST fly the airplane until below 80 KIAS.