canoe is usually fitted with long paddles and a sail made of canvas. It is said that is used to sail along the coasts of northern Borneo or even to travel across the sea, for example, to Singapore. Besides that, the Ibans make various blades called (small blade for intricate handworks), , and . Seligi is a spear made of a natural strong and sharp material like aping palm. Some Iban are in blacksmithing although steel is bought through contact with the outside world. Although silversmithing originates from the , some Iban became skilled in this trade and made silverware for body ornaments. The Iban buy brass ware such as (gong), (snare) and (tray) and (small box) from other people because they do not have brass-smithing skills. The Iban make their own to split the areca nut and to grind the split pieces of the areca nut. They also make (finger-held blade) to harvest ripened paddy stalks and (hand-held blade) to weed. Longhouse The traditional Iban live in longhouses (rumah panjang or rumah panjai). The architecture of a longhouse along the longitude (length) is designed to imitate a standing tree with a trunk (symbolized by the central tiang pemun being erected first) in the middle point of the longhouse with a branch on the left and right hand size. The tree log or trunk used in the construction must be correctly jointed from their base to the tip. This sequence of base-tip is repeated along the left and right branches. At each joint, the trunk will be cut on the lower side at its base and on the upper side at its tip. So this sequence of lower-upper cut will be repeated at subsequent trunks until the end. On the side view of a longhouse, the architecture also imitates the standing tree design i.e. each central post of each family room has left and right branches. Therefore, each part of the longhouse must be maintained if the longhouse is to remain healthy like a natural tree living healthily. The layout of a traditional longhouse of the Iban Dayak could be described as follows: A central wall runs along the length of the building approximately down the longitudinal axis of the building. The space along one side of the wall serves as a corridor running the length of the building while the other side is blocked from public view by the