Abstract
This paper is concered with the considerations used in the variations of the architectural structural scale in the seventeenth century and eighteenth century. The traditional Japanese structural scale is expressed generally by a basic span and its multiple in the structure's front face. Also, in "KIWARI", almost all the structural dimentions are a proportion of the basic span and a certain coefficient. However, in the "KIWARISHO", the traditional Japanese architectural textbook, we can find adequate consideration for the composition especially in the "SHOUMEI", one of the above-mentioned texbooks. As a consideration in the variation of the structural scale, the proportional coefficient of the height or the roof size is lower for a larger structure, or higher for a smaller one.
