Abstract
If every room is of the same size and also square shape, the length of partition wall, L_p will be represented by eq (1) : [numerical formula] where N : the number of rooms A : building area L_o : the length of perimeter wall And if we repersent L_p by eq. (2) : [numerical formula] the coefficient (1-α) will be zero when every room is same sized and also square shaped. In this paper we demonstrate that the coefficient α is neary equall to zero in the usual house plan.