This research is aimed to propose an effective using method of the non-utilized “Wara” (straw) that largely produced in human daily-life every year. As the direction of effective use, Wara with its characteristics (containing the felling of quality of material, functionally shape of intensity, natural material that taken advantage of environment, etc.) has been explored of its possibility as a structure component. Moreover, this research decided to use the “Warabo” (straw stick) material proposed by earlier study as the method. As the result of real product, in the dome by diameter of about 3m and about 1.75m height, transformation was not seen by work of drag of joint. It was verified that Warabo material (l=50cm, t=8cm) could sufficiently use as structure material by this experiment and work.
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