Abstract
As a part of the present investigation has already been reported in the former information, there are a number of unclarified points regarding use of the Y-type lumbers of the excavations in Sakuramachi-Site (Oyabe City, Toyama). On the assumption that the Y-type lumbers can be used as sledges, in the present report describe on a conclusion reached by comparing simpler experiments regarding tribology of the Y-type lumbers with the results of calculation.
