An instrument is set-up at point A and vertical angles are observed at B -21º15' and C +33º45'. The height of instrument from point A = 1.5865m. The horizontal distance of BA and BC are 350.2552m and 904.5565m respectively. If point C is at elevation 620.6453m; a. Determine the elevation of B neglecting the effects of the curvature and refraction. b. Determine the elevation of the B making due allowance for the curvature and refraction,

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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An instrument is set-up at point A and vertical angles are observed at B -21º15' and C +33º45'. The height of instrument from point A = 1.5865m. The horizontal distance of BA and BC are 350.2552m and 904.5565m respectively. If point C is at elevation 620.6453m;

a. Determine the elevation of B neglecting the effects of the curvature and refraction.

b. Determine the elevation of the B making due allowance for the curvature and refraction,

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