1.What is the longest parabolic curve that can be used to connect two grades and at the same time provide at least 5 m of clearance under the bridge at its center line? 2.If the underside of the bridge is level and is 12 m wide, find the actual clearance at left edge of the bridge. 3. If the underside of the bridge is level and is 12m wide, find the actual clearance at right edge of the bridge.
1.What is the longest parabolic curve that can be used to connect two grades and at the same time provide at least 5 m of clearance under the bridge at its center line? 2.If the underside of the bridge is level and is 12 m wide, find the actual clearance at left edge of the bridge. 3. If the underside of the bridge is level and is 12m wide, find the actual clearance at right edge of the bridge.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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A -3% grade meets a +5% grade at a vertex (El. 146.24) directly under an over pass bridge whose underside is at elevation 152.74, and comes another road across the grades at right angles.
1.What is the longest parabolic curve that can be used to connect two grades and at the same time provide at least 5 m of clearance under the bridge at its center line?
2.If the underside of the bridge is level and is 12 m wide, find the actual clearance at left edge of the bridge.
3. If the underside of the bridge is level and is 12m wide, find the actual clearance at right edge of the bridge.
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