1. For the figure shown, a vertical angle of - 14°30' is taken to a target 1.75 m above point 3. The measured sloping distance s is 644.15 m and the elevation of point A is 320.70 m above nean sea level. Determine the elevation of B if he height of instrument at A is 1.27 m and considering the effect of the earth's curvature and refraction. Leveling Rod

Structural Analysis
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Author:KASSIMALI, Aslam.
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Chapter2: Loads On Structures
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TRIGONOMETRIC LEVELING
=-14'30
1. For the figure shown, a vertical angle of
- 14°30' is taken to a target 1.75 m above point
B. The measured sloping distance s is 644.15 m
and the elevation of point A is 320.70 m above
mean sea level. Determine the elevation of B if
HI = 127 m
the height of instrument at A is 1.27 m and
considering the effect of the earth's curvature
and refraction.
s 644.15 m
DE
Leveling Rod
RR = 1.75 m
Elev A = 320.70 m
Elev 8 =?
Reference Datum
(Mean Sea leve)
Transcribed Image Text:TRIGONOMETRIC LEVELING =-14'30 1. For the figure shown, a vertical angle of - 14°30' is taken to a target 1.75 m above point B. The measured sloping distance s is 644.15 m and the elevation of point A is 320.70 m above mean sea level. Determine the elevation of B if HI = 127 m the height of instrument at A is 1.27 m and considering the effect of the earth's curvature and refraction. s 644.15 m DE Leveling Rod RR = 1.75 m Elev A = 320.70 m Elev 8 =? Reference Datum (Mean Sea leve)
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