It may be possible to argue that the supply and demand for non-industrial building using still frame construction to be increasing in recent years in some parts of the world. The most cost effective approach appears to be to do them in layers that seat on top of each others. This in turns create substantial voids for walls, floors and roofs if compared with traditionally build or reinforced frame constructed building. As a result it can be argued that the ratios of building volume or gross floor area for steel frame buildings to be less efficient than those of buildings using traditional or reinforced frame construction. Are you aware of any research that explore this issues? Thanks!