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10. A 6% grade meets a -4% grade at a vertex whose directly under an overpass bridge whose underside is at elevation 152. 74 m. and carries another road across the grades at right angles. a. The length of the curve on the side of the back tangent is 70 m., while on the right side of the forward tangent is 100 m. long. Compute the vertical clearance from centreline of the bridge to the vertical curve if the elevation at PC is 142 m. b. If the underside of the bridge is level and is 10 m. wide, Find the actual clearance on the left and right edge of the bridge.

10. A 6% grade meets a -4% grade at a vertex whose directly under an overpass bridge whose underside is at elevation 152. 74 m. and carries another road across the grades at right angles. a. The length of the curve on the side of the back tangent is 70 m., while on the right side of the forward tangent is 100 m. long. Compute the vertical clearance from centreline of the bridge to the vertical curve if the elevation at PC is 142 m. b. If the underside of the bridge is level and is 10 m. wide, Find the actual clearance on the left and right edge of the bridge.

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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PROBLEM SET ON VERTICAL CURVES

SYMMETRICAL OR UNSYMMETRICAL PARABOLIC CURVE

10. A 6% grade meets a -4% grade at a vertex whose directly under an overpass bridge whose underside is at elevation 152. 74 m. and carries another road across the grades at right angles. a. The length of the curve on the side of the back tangent is 70 m., while on the right side of the forward tangent is 100 m. long. Compute the vertical clearance from centreline of the bridge to the vertical curve if the elevation at PC is 142 m. b. If the underside of the bridge is level and is 10 m. wide, Find the actual clearance on the left and right edge of the bridge.
Transcribed Image Text:10. A 6% grade meets a -4% grade at a vertex whose directly under an overpass bridge whose underside is at elevation 152. 74 m. and carries another road across the grades at right angles. a. The length of the curve on the side of the back tangent is 70 m., while on the right side of the forward tangent is 100 m. long. Compute the vertical clearance from centreline of the bridge to the vertical curve if the elevation at PC is 142 m. b. If the underside of the bridge is level and is 10 m. wide, Find the actual clearance on the left and right edge of the bridge.
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