设计规划哥伦比亚河斜拉桥建在地震区,是美国同类型建筑的第二座桥。桥长763米,该桥于1971年开始规划。规定:主跨水平净空为107米,竖直净空不小于17米;每端引道应有最小坡度,以保证司机的安全;基本造价和养护费用应最省;主要结构必须具备足够的强度和耐久性。 Design and Planning The Columbia River Cable-Stayed Bridge was built in the earthquake zone and is the second bridge of its kind in the United States. The bridge is 763 meters long and the bridge began its planning in 1971. Provisions: the main span horizontal clearance of 107 meters, the vertical clearance of not less than 17 meters; each way should have the smallest gradient, in order to ensure the safety of drivers; basic cost and conservation costs should be the most; the main structure must have sufficient strength and Durability.