2020 Volume 85 Issue 774 Pages 633-643
This research is aimed at promoting the use of regional materials for structural materials made of larch wood, which is low in use for building applications, and structural laminated wood made of Sakhalin fir wood, which is expected to increase in the amount of resources.
The purpose is to clarify the possibility of cost reduction.
As cost-cutting measures, it is conceivable to use biomass fuel (sawdust and chip) as a fuel for drying wood, and to expand the production scale by taking advantage of scale merit. On the other hand, when the production scale is expanded, a large amount of raw wood is required, so the range of raw wood collection is expanded, and it is assumed that the product price will be improved due to the increase in transportation costs.
Therefore, in this study, the price of the product was estimated based on the production scale of the larch structural material and Sakhalin fir glulam and the impact of fuel when drying wood. The product price of larch structural materials was reduced by approximately 18-28% by increasing the production scale from 10,000 m3 log consumption to 70,000 m3/year. In addition, by using biomass fuel, a reduction effect of about 11-16% was seen compared to factories of the same scale.
The production volume is 5,623 m3 square timber and 6,158 m3 flat square timber.
These structural materials correspond to about 700 houses.
The product price of Sakhalin fir Glulam has been reduced by about 44-52% by increasing the production scale from 3,000 m3 to 61,000 m3/year.
In addition, the use of biomass fuel resulted in a reduction of about 1 to 3% compared to factories of the same scale.
The production volume is 29,280 m3 square timber and 31,720 m3 flat square timber.
These structural materials correspond to about 3,660 houses.
As a result of the trial calculation, the possibility of reducing the product price due to the cost reduction effect was found.
It was clarified that if a certain level of demand could be secured, it would be possible to sell at a price that could compete with imported and laminated timber.
In the future, in order to realize the cost reduction measures described in this paper, it will be necessary to comprehensively consider the supply system and procurement range of raw wood commensurate with production, and labor saving of production due to difficulty in securing human resources.
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