Figure 17.—Sennit rafter designs (a-e, te puta o Te 'I'iri design): a, first course (ka'a ta'i) showing rafter (1) with sennit (2) tied with running noose (3) and making ascending spiral turns which are kept parallel. b, second course (te rua o te ka'a) in which sennit descends to starting place, turns crossing in midline in front (4) and at back (5). c, third course (te toru o te ka'a) in which spiral turns ascend in middle of space between ascending turns of first course. d, fourth course (te 'a o te ka'a) in which descending turn crosses third course in middle of front and back. This completes the design in single braid. e, puna toru (triple) form of te puta o Te 'I'iri design which carries on from single design in d, represented by middle braid (1) in all turns; technique a to d repeated, the second braid (2) kept below the first (1) throughout. On completion the form is a puna rua (double) but the triple form is continued by repeating a to d with the third braid (3) kept above the first braid (1) throughout. f, te rua o te Ikatuna in puna rua form: technique a to d is similar but spacing wider; second braid (2) kept below first (1).