Expandable House/Foldable House Expandable box-type modular house, which includes a box module, foldable roof module; claimed box module features a box-type steel structure frame, a base plate set to the steel structure frame, a primary hill wall, a next hill wall Found on either side from the steel structure frame https://mobile-container-house83715.blogspothub.com/30730265/fascination-about-environment-easy-install-portable-office-folding-container-house