Quonsets have been covered in bags. Barrel vaults with decent spans have been bagged with strong permanent formwork. With temporary formwork, can't really vault much over 6', 8' with double bag wall to butress lateral thrust.
Or bag vertical walls and frame or ferrocement a vaulted roof
Spare the rod, spoil the child. Here, use this tiny ad named Rod:
montana community seeking 20 people who are gardeners or want to be gardeners
