DUCT FOR FORESTS, CAPABLE OF PREVENTING AN ACCIDENT DUE TO WATER OR SOIL IN A HEAVY RAIN

摘要

PURPOSE: A duct for forests is provided to prevent the breakdown of a duct body due to water pressure and soil pressure by forming a triangular duct body.;CONSTITUTION: A duct(1) for forests has a triangular shape and is comprised of first to third sides(2-4). An angle between the first and second sides is 100 to 110 degrees. An angle between the second and third sides is 50 to 60 degrees. The angel between the first and third sides is 20 to 30 degrees.;COPYRIGHT KIPO 2011