chaca
(n) A bridge. RSRS · runasimi.de Inca rope bridges were simple suspension bridges over canyons, gorges and rivers to provide access for the Tawantinsuyu. Bridges of this type were useful since the Inca people did not use wheeled transport — traffic was limited to pedestrians and livestock. The bridges were an integral part on the Inca road system [see, ñan] and are an example of Inca innovation in engineering. They were frequently used by ch’aski (see, below) runners delivering messages throughout the Inca Empire. The Incas used natural fibers found within the local vegetation to build bridges. These fibers were woven together creating a strong enough rope and were reinforced with wood creating a cable floor. Each side was then attached to a pair of stone anchors on each side of the canyon with massive cables of woven grass linking these two pylons together. Adding to this construction, two additional cables acted as guardrails. The cables which supported the foot-path were reinforced with plaited branches. This multi-structure system made these bridges strong enough to even carry the Spaniards while riding horses after they arrived. The design naturally sags in the middle. Part of the bridge’s strength and reliability came from the fact that each cable was replaced every year by local villagers as part of their mit’a public service or obligation. The repair of these bridges was dangerous, to the degree that those performing repairs often met death. The last remaining Inca rope bridge is the Q’eswachaka (see). WIKIWIKI · en.wikipedia.org (no www)