1. A backsight of 3.055 m is taken on a point 75 m from a level station and a foresight of 1.258 m from the same station. Determine the difference in elevation between the two points, taking into account the effects of the earth's curvature and atmospheric refraction.

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Chapter2: Loads On Structures
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1. A backsight of 3.055 m is taken on a point 75 m from a level station and a foresight of 1.258 m from
the same station. Determine the difference in elevation between the two points, taking into account
the effects of the earth's curvature and atmospheric refraction.
2. Complete the differential leveling notes below and perform the customary arithmetic check.
STA
BS
HI
FS
ELEVATION
BM 10
2.085
137.450 m
TPI
2.015
0.982
TP2
!.864
1.428
TP3
0.579
1.527
BMII
0.423
2.423
ТР4
1.446
1.807
ТР5
1.778
1.725
TP6
2.05 !
2.339
TP7
2.920
1.005
BM 12
3.186
2.358
TP8
2.805
0.995
TP9
0.774
1.206
BM 13
0.603
Transcribed Image Text:1. A backsight of 3.055 m is taken on a point 75 m from a level station and a foresight of 1.258 m from the same station. Determine the difference in elevation between the two points, taking into account the effects of the earth's curvature and atmospheric refraction. 2. Complete the differential leveling notes below and perform the customary arithmetic check. STA BS HI FS ELEVATION BM 10 2.085 137.450 m TPI 2.015 0.982 TP2 !.864 1.428 TP3 0.579 1.527 BMII 0.423 2.423 ТР4 1.446 1.807 ТР5 1.778 1.725 TP6 2.05 ! 2.339 TP7 2.920 1.005 BM 12 3.186 2.358 TP8 2.805 0.995 TP9 0.774 1.206 BM 13 0.603
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