坪当り大工工数の史的考察 : 建築積算技術の史的発展 VII

抄録

A general idea of evaluating houses by standard labor per unit area (tsubo) was unified at any late on 1751 and had been inherited to the present day. From the beginning of Edo-era standard labor per unit area was already used as data of the estimated cost. In the data book on official construction of Osaka Castle, Edo Castle, etc. There were two kinds of standard labor per unit area : a) The esimated number of carpents per unit area (before construction) b) The practical number (after construction) Even today, this estimation technique is also used by all kinds of construction works. The sousce of the idea comes from the idea of the estimated number. The reason why the estimation technique by standard labor was so popular was related with social and economical background of the age. Standard labor was made possible to estimate the construction cost by the experience of building houses for a long time.