Figure 232.—Raised ribs of side piece with hook:

a, inner surface of middle piece of lower tier showing completed flanges of lower edge (1), upper edge (2), and the ends (3, 4), also 4 raised ribs evenly spaced, 2 (5) inclining to the left like the end edge (3), and 2 to the right (6) like the end edge (4). The ribs are level with the raised flanges, are sloped on either side, and the intervening parts cut down to the plank thickness—the ribs are 1 foot 7 inches apart. b, On the left tatao section (fig. 224, a, 6), the fa'alave hook is made. A short horizontal rib (1) 7.5 inches long is made from the middle of a transverse raised rib (2) and the end under cut to form a hook.