Investigation of the using condition of lumber for wooden house in Toyama prefecture [Japan]
1994
Nakatani, H.(Toyama-ken. Forestry and Forest Products Research Center, Imizu (Japan)) | Ohmori, M.
This paper deals with the using condition of lumber for wooden house in Toyama in order to consider the method of increase of demand for wood from Toyama and Siberia. We investigated volume, species, size and grade of lumber based on dimensions papers of 43 wooden houses by conventional construction system. The results are summarized as follows: 1) Wood volume per architectural area is 0.208 cubic m/square m. This value is larger than average value of similar survey on a national scale. This is probably because structural member size became empirically larger in snowy area. 2) The percentage of volume of structural members, members for finish and sub-members to all lumbers are respectively 70%, 13%, and 17%. And the percentage of beam member is 74% to structural members. 3) The percentage of volume of domestic wood, wood from North America, and wood from Siberia to all members are respectively 14%, 29%, and 55%. Wood from Siberia is utilized abundantly on wooden house in Toyama, especially Siberian larch and spruce form 79% of volume of sub-member and 52% of volume of structural member. Main species of domestic wood is sugi, and that is used for member of column.
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