Include both older and newer steel buildings:Older ones are "a typical Japanese type of steel building construction was developed in the early 1960's in answer to steel shortages and the high cost of structural steel in Japan. Many of these buildings, designed and constructed without much regard for seismic considerations, suffered a considerable amount of a damage during this earthquake. The potential ductility of these buildings is severely limited as the cold-formed steel sections used for columns will typically develop local buckling prior to attainments of their plastic movement capacity." Newer ones are "as steel structures are frequently hidden behind fireproofing coatings are architectural finishes, it will take more time before the full extent of damage to steel b buildings is known. However, at the time of writing, some new steel buildings were known to have suffered important damage."