Wooden hut structure. A wooden hut structure formed the basis for modern prefab steel building today. Because the arc design of the wooden hut structure meant that the walls were curved, where they met the floor, it was difficult to place furniture and machines against the walls of wooden hut structure. The structure of the wooden structure was later altered to cabin walls are at 90 degrees, the wasted space of the original design curved wall eliminated. An added bonus of the new design of the wooden hut that the structure was disassembled components of the structure into more pieces and was not so heavy. And the curved arch framework introduced here is still used by many of today's portable steel building manufacturers. See all the selections of log cabin structure.