US Patent 10519647 Shipping container expansion insert

An expansion insert for converting an ISO shipping container into a housing unit is provided, the insert having a compacted form reversibly convertible to a expanded form. The insert has a frame assembly torsionally hinged to a roof assembly and a floor assembly. Two pivot walls and a sidewall are also built into the insert. The insert may be compacted for shipping, expanded after insertion into an ISO container, and compacted again on the ISO container.