Horizontal, rectangular platform with one load cell at each corner,

i.e. 4 independent load cells: A,B,C,D.

Off-platform-center, variable vertical load (z axis), stationary load-point position (x,y) located at all times within the platform's perimeter.

Note: likely each A,B,C,D load cell will be sensing a different vertical load.

Question: How to measure (the math for) the total A+B+C+D combined, z-axis, vertical loading?

I am assuming this is a simple case of adding up (arithmetic sum) all A+B+C+D vertical contributions/effects.

Welcome comments/corrections if this A+B+C+D assumption is wrong.

This seems to me straight forward, as this project is similar to a bathroom floor scale, with some expected amount of x,y,z vibrations (10Hz max), and wanting maximum readings per second possible (100reads/sec to 120 reads/sec).

Only z-axis data is important.

Thank you,

Dan