Abstract: A portable enclosure for temporary shelter purposes as a storage building or workshop at remote construction sites comprises a plurality of articulable frames mounted on a towable boom, which may be coupled to a towing tractor, and which has wheels at the other end so that it may be towed. Each of the frames has first to fourth frame members, with a first cylinder mounted between the boom and the first frame member to adjust the tilted disposition of that member with respect to the boom to vertical. The angle between the second and third members is adjusted by a second cylinder. The fourth member also assumes a vertical orientation. Thus, each of the first and fourth frame members of each frame is articulable to a substantially vertical orientation, and they are horizontally distanced one from the other so as to form a storage or workshop space between them.