A transit is set up at a point B which is between A and C. The vertical angle observed towards A is known to be -20° and that of Cis +12'. The horizontal distance between A and B is 642.80m and that of B and C is 1032.40m. The height of instrument is 1.5m above B with A having an elevation of 146m. Considering the effect of curvature and refraction correction. A. Compute the difference in elevation in meter between A and C.

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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A transit is set up at a point B which is between A and C. The vertical angle observed towards A is known
to be -20° and that of Cis +12'. The horizontal distance between A and B is 642.80m and that of B and C
is 1032.40m. The height of instrument is 1.5m above B with A having an elevation of 146m. Considering
the effect of curvature and refraction correction.
A. Compute the difference in elevation in meter between A and C.
Transcribed Image Text:A transit is set up at a point B which is between A and C. The vertical angle observed towards A is known to be -20° and that of Cis +12'. The horizontal distance between A and B is 642.80m and that of B and C is 1032.40m. The height of instrument is 1.5m above B with A having an elevation of 146m. Considering the effect of curvature and refraction correction. A. Compute the difference in elevation in meter between A and C.
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