A debris fence, above an upland field or above an isolated or uppermost terrace on a slope to prevent falling dirt, debris or rats from entering the terrace area.
Constructed of vertical posts, with arrow-grass canes, bilāu, laid horizontally, about 30 - 40 cm. high, and plugged tightly with grass tied on with vine, wa'al, spear grass, gūlun, or cane leaves.