Roof banding material.
Usually of rattan, sometimes of vine, āoy. On a traditional house, baluy, and pile hut, inappal, the banding material ties two arrow-grass wattle rafters, tuldug, on either side of each roof-ridge rafter, dūgu, tightly towards each other near the bottom, center, and near the top of the roof ridge. This butts the arrow-grass cane purlins, ībat, tied to the cane rafters, on one side into the cane purlins on an adjacent side at each of the four roof ridges to make a tight ridge line. Roof banding material also ties three or four cane purlins at the center of each roof side to an inside rafter of a traditional house or pile hut, and at several places of the rafters, adpang, of other roof types.