The R44 has a passenger and baggage limit of 136kg per seat.
The GA8 has several different floor loading zones, the highest is around 93kg per square foot. This figure is for freight -
section 6.4 has reference to "heavy pilots" I guess heavy could be determined by seeing when W&B goes out the window at light fuel and full fuel.
http://www.capaddison.org/ga-fm-04.pdf