Zero Fuel Weight plus Total Fuel Load is used to determine which two weights?

The total of Zero Fuel Weight (ZFW) plus the Total Fuel Load is utilized to determine the Ramp Weight and the Takeoff Weight of an aircraft.

Zero Fuel Weight represents the weight of the aircraft without any usable fuel, including passengers, cargo, and other necessary items onboard. When you add the Total Fuel Load, which is the weight of the fuel that will be consumed during the flight, you get the Ramp Weight. This weight is critical because it reflects the entire mass of the aircraft at the ramp, just before it begins to taxi.

As the aircraft then takes off, the Ramp Weight evolves into the Takeoff Weight, which is the weight at the point of departure. Takeoff Weight accounts for any fuel that might have been consumed during taxiing, along with the loads in the aircraft.

The other weight options presented, such as Taxi Weight, refers specifically to the weight of the aircraft before it starts its takeoff roll, which does not separate into the distinct categories of Takeoff and Landing. Hence, focusing on Ramp and Takeoff Weight is essential for understanding operational limits and performance criteria before leaving the ramp for takeoff.