Essentially, the FAA publishes a "demonstrated crosswind" limit...
It appears in your AFM, or your AOM.
For the 747 Classic - 30 Kts.
xxx
Then there is a "company policy limit" which may appear in the GOM.
PanAm's for the 747 was - 30 kts... no surprise there.
No words about gusts, in the AFM, AOM or GOM.
My opinion, consider limiting yourself to gusts not exceeding steady wind limits.
xxx
If you fly an airplane with a AFM or AOM "demonstrated limit" of 30 Kts -
And land with wind "35G45" direct crosswind, you are now a
test pilot
That is the good wisdom of a friend formerly FAA inspector.
I dont think the insurance (nor your chief pilot) will appreciate any damage.
And FAA inspectors might call it "reckless" operation of an aircraft.
xxx
Remember, little boy and little girls...
Swept wing airplanes, is not only the bank angle (and outer engine pods).
Nose up touchdown attitude of swept wings make bank+attitude limits more critical.
xxx
When I landed in bad x-winds, I could have qualified for Navy pilot wings.
Happy contrails