Figure 25.—Lashing of intermediate purlins to rafters:

a, single lashing turns with principal and thatch rafters: 1, principal rafter; 2, intermediate purlin; 3, thatch rafters—the working hank is attached to the left principal rafter (1) with a running noose. Transverse turns are made around the purlin (2) on the left and right edges of the rafter followed by two single diagonal crossing turns and finished off with a circumferential turn between the rafter and the purlin. The purlin having been lashed to the principal rafter, the braid goes on to the right to deal with the thatch rafters successively by single turns around the purlin on the left side of the thatch rafters; b, the braid coming from the rafter on the left along the back of the purlin passes under the thatch rafter and crosses over downwards to the left; c, front of the purlin on which the braid passes upwards on the left side of the rafter to make a single transverse turn around the purlin; d, back of the purlin where the braid appearing over the upper edge of the purlin on the left, crosses diagonally over the back of the rafter downwards to the right; e, continuation of back view in which the braid from the right lower corner makes a circumferential turn between the purlin and the rafter and goes on to the right to continue the lashing with the next thatch rafter. A closer lashing may be made by making two single turns around the purlin with each thatch rafter (f, 4). Instead of making a circumferential turn after the lashing has reached the stage (d), the braid from the right lower corner makes a transverse turn around the purlin on the right side of the rafter as in (g). The circumferential turn is then made and the braid passes on to the right as in (h) which shows the back view. A variation of the two single turns is shown (f, 5). Instead of the first turn around the purlin being straight (c) the braid is curved inwards past the middle vertical line of the rafter as in (k). The curve is maintained by pressure of the left thumb against the purlin. The second transverse turn around the purlin is curved to cross the first, as in (m), when it effectively holds the first curve in position and will not slip itself as it rests against the rough surface of the sennit of the first curve.