39 assembled thereto with vertical side edges of adjacent panels abutting one another at both faces of each the posts are square in tubular cross section with one diagonal of each parallel and the other diagonal perpendicular to the panel faces and fitting into complementary triangular recesses in the abutting panel edges fig2 c shows wall 10c similarly three posts 12a and four panels 20 34 are assembled in line with vertical side edges of adjacent panels abutting one another at both faces of each the posts are round in tubular cross section semicylindrical recesses in the abutting vertical panel edges accommodate the posts as the other shapes of notches received the diversely oriented square posts for consistency in representation the fence post of fig1 a is shown with the square post in one orientation in fig2 a and the exterior building wall utilizes a like post in diagonal orientation in fig2 b and the interior wall of fig1 c has a round post in fig2 c it will be understood that different shapes sizes and orientations of tubular posts may be used in any of the walls notwithstanding that structural considerations personal preference cost or availability may determine which wall contains which post succeeding views illustrate how panel vertical side edges and the ends of the horizontal panel reinforcing members are indented to accommodate a peripheral or circumferential one half of a particular post orientation arrangements and how the reinforcing members are preferably swaged and then are secured to the posts by fasteners 24 fig3 a shows in sectional plan a bottom end portion of panel 20 with upturned channel shaped reinforcing member 28 t shaped slit 27 in the channel bed bisects the end for slightly more than one half the width of a.