Let A be a point of elevation 130.48m above datum, and let B and C be points of unknown elevation. By means of an instrument set 1.22m above B, vertical angles are observed, that to A being -13°45' and that to C being +7°32'. If the horizontal distance AB is 547.20m and the horizontal distance BC is 923.95m, Determine the difference in elevation between A and B. Determine the difference in elevation between B and C. Determine the elevation of B making due allowance for earth's curvature and atmospheric refraction. Determine the elevation of C making due allowance for earth's curvature and atmospheric refraction.

Let A be a point of elevation 130.48m above datum, and let B and C be points of unknown elevation. By means of an instrument set 1.22m above B, vertical angles are observed, that to A being -13°45' and that to C being +7°32'. If the horizontal distance AB is 547.20m and the horizontal distance BC is 923.95m, Determine the difference in elevation between A and B. Determine the difference in elevation between B and C. Determine the elevation of B making due allowance for earth's curvature and atmospheric refraction. Determine the elevation of C making due allowance for earth's curvature and atmospheric refraction.

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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