Monolithic Cabin-Model 15
Model 15 – Its diameter is 12 feet, length 14.3 and living area of 150 square feet. The Monolithic Cabin is an all-purpose unit!
Image from The Monolithic Cabin -- Transportable story

Model 15 – Its diameter is 12 feet, length 14.3 and living area of 150 square feet. The Monolithic Cabin is an all-purpose unit!