Problem 5.6 A trigonometric leveling method was used to measure elevation between different stations. The transit is set at station B which is between stations A and C. The vertical angle observed towards station A is -13'36'52" while at station C is -10'15'19". The horizontal distance between A and B is 1899.72m and from B to C is 2532.41m. The height of instrument is 1.5m above B and the elevation of station A is 241.56m. Considering the effect of curvature and refraction correction, compute the elevation of each station and the difference in their elevation.

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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ANSWER KEY:
Elev Sta. B=  700.3994m
Elev Sta. C=243.2945m
∆hAB = 458.8394m
∆hBC = 457.1049m
∆hCA = 1.7345m

NOTE: these are the exact answers.

Problem 5.6
A trigonometric leveling method was used to measure elevation between different
stations. The transit is set at station B which is between stations A and C. The vertical
angle observed towards station A is -13 36'52" while at station C is -10°15'19". The
horizontal distance between A and B is 1899.72m and from B to C is 2532.41m. The
height of instrument is 1.5m above B and the elevation of station A is 241.56m.
Considering the effect of curvature and refraction correction, compute the elevation of
each station and the difference in their elevation.
Transcribed Image Text:Problem 5.6 A trigonometric leveling method was used to measure elevation between different stations. The transit is set at station B which is between stations A and C. The vertical angle observed towards station A is -13 36'52" while at station C is -10°15'19". The horizontal distance between A and B is 1899.72m and from B to C is 2532.41m. The height of instrument is 1.5m above B and the elevation of station A is 241.56m. Considering the effect of curvature and refraction correction, compute the elevation of each station and the difference in their elevation.
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