Abstract
In Hokkaido, building construction in winter tends to be still kept at a distance. One of the reasons is that winter construction requires additional costs for winter cares. In the meantime, year-round construction activity is necessary to keep the building industry sound. Winter construction is thus unavoidable. One of problems to be solved to promote winter construction is to establish the adequate estimation method of additional costs. The estimation method is indispensable not only to estimate construction costs, but also to evaluate the economic efficiency of year-round construction.In this paper, an estimation system of additional costs of winter building construction is proposed.
