Hi Nissa,
I would guess that someone somewhere has done the math, but it was not me :)
The best I have is to tell you that hempcrete is generally 1/8th or 1/7th the weight of
concrete. In all the use cases of hempcrete that I have seen, it is not being held up by the frame, it is being held up by the foundation, and simply surrounds the frame.
"The future is something which everyone reaches at the rate of sixty minutes an hour, whatever he does, whoever he is." C.S. Lewis
"When the whole world is running towards a cliff, he who is running in the opposite direction appears to have lost his mind." C.S. Lewis