Ford F-150 2021 Supplemental Owner's Manual page 69

Load Carrying
The above calculations also
assume that the loads are
positioned in your vehicle in a
manner that does not overload
the front or the rear gross axle
weight rating specified for your
vehicle on the Safety Compliance
Certification label.
66
F-150 (TFD) Canada/United States of America, enUSA, Edition date: 202008, First-Printing