A drop down veranda is a schizophrenic wall needing to be a floor. Each carries different structural loads and serves different purposes. Thus a drop down veranda is over spec for both jobs. Ours was built primarily as a floor to take the weight of many people at a party. As such it was built like one. Unlike the rest of the building the DDV frame is made from seasoned softwood to reduce weight. This is insulated in the conventional way and then boarded out. The exterior cladding is green western red cedar. I have calculated that the whole thing would be in the region of 500kg so Rob made his lifting mechanism capable of lifting this load. The majority of the weight is actually in the cladding, which will season, and loose weight over the first two years. With more time, a larger budget, or a desire to use more modern or high tech materials a lighter structure could be made. Also if such a thing is just for personal use by one or two people of course the internal structural work could be less substantial.