Standard weights and a/c capacity

[Pilot DAR]

In Canada,

This: https://www.tc.gc.ca/en/services/avi...c-700-022.html

is an official reference.

The strength of seats an seatbelts varies with the certification basis of the aircraft (vintage). 170 pound occupant weight is a common starting point. Newer aircraft have higher design load/capacity requirements, and test methods.