The following data were obtained by stadia observation: vertical angle, +12°30'; upper stadia hair reading and lower stadia hair readings, 4.500 and 3.250 m, respectively. The rod reading was taken at 3.875 m above the stadia point at A and the height of instrument above the instrument station, B, is 1.620 m. The stadia interval factor is 99.5 and the instrument constant is O.381 m. Compute the difference in elevation between the two ground points. (Type your answer using 3 decimal places, numerical value only, no need to include the units).

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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With initial and final diagram 

The following data were
obtained by stadia
observation: vertical angle,
+12°30'; upper stadia hair
reading and lower stadia hair
readings, 4.500 and 3.250 m,
respectively. The rod reading
was taken at 3.875 m above
the stadia point at A and the
height of instrument above
the instrument station, B, is
1.620 m. The stadia interval
factor is 99.5 and the
instrument constant is O.381
m. Compute the difference in
elevation between the two
ground points. (Type your
answer using 3 decimal places,
numerical value only, no need
to include the units).
Transcribed Image Text:The following data were obtained by stadia observation: vertical angle, +12°30'; upper stadia hair reading and lower stadia hair readings, 4.500 and 3.250 m, respectively. The rod reading was taken at 3.875 m above the stadia point at A and the height of instrument above the instrument station, B, is 1.620 m. The stadia interval factor is 99.5 and the instrument constant is O.381 m. Compute the difference in elevation between the two ground points. (Type your answer using 3 decimal places, numerical value only, no need to include the units).
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