Figure 23.—Lashing of thatch rafter ('aso) to purlins. The 'aso touches the large rounded purlin in the middle line of its long axis, so that "above" and "below" the purlin applies to the parts that touch and not the upper and lower edges of the purlin seen in the figure:

1, purlin; 2, 'aso: a, the braid (3) from the principal rafter lashing on the left (fig. 20) is brought across on the outer surface of the purlin (1) to pass beneath the 'aso (2), and above the purlin contact to the right of the 'aso over which it is crossed diagonally downwards to appear on the inner surface of the purlin to the left of the 'aso. b, The braid makes a transverse vertical turn over the inner" surface of the purlin; c, crosses over the back of the 'aso diagonally downwards to the right; d, and appears on the under side of the purlin and makes a vertical turn upwards on the right of the 'aso; e, at the back, it again crosses the 'aso diagonally downwards but to the left; f, appearing on the purlin to the left of the 'aso, the braid makes a vertical turn upwards to the outer side of the first turn (b); g, it crosses the 'aso diagonally downwards to the right; h, appearing on the purlin, the braid makes a second vertical turn upwards to the outer side of the previous turn on the right. This completes the set of two vertical pairs of turns on the inner surface of the purlin k, The lashing is finished off with a circumferential turn (4) round the lashings between the 'aso and the purlin and the braid (5) passes on to the next 'aso to repeat the technique described. m, A section through the purlin (1) shows the circumferential turn (4) passing between the purlin and the 'aso (2).