Surveying Question:A differential leveling circuit starts at benchmark Concrete Benchmark (Elevation=232.051m) goes out to an unknown benchmark and then continues to a known control point (Elevation=227.975m). Two turning points are used with the measurements included in the attached table.Determine the elevation of the unknown benchmark Determine the order and class of the survey.For First order Class 1:Allowable Error= +/- 4(K)1/2Range of Constant= m less than/equal to 4For First Order Class 2:Allowable error= +/- 5(K)1/2Range of constant= m greater than/equal to 4, and m less than equal to 5 (between 4 and 5)For Second Order Class 1: Allowable error = +/- 6(K)1/2Range of Constant = m greater than/equal to 5, and m less than equal to 6 (between 5 and 6)For Second Order Class 2:Allowable error = +/- 8(K)1/2Range of Constant = m greater than/equal to 6, and m less than equal to 8 (between 6 and 8)For Third Order, Any Class:Allowable Error = +/-12(K)1/2Range of Constant = m greater than/equal to 8 and m less than/equal to 12 (between 8 and 12) StationBacksight (m) Foresight (m) Distance (m)Concrete B.M.TP12.0524.2013.2961791Unknown B.M.0.95224826.388Control Point1.5861346

Rise and Fall method has been used for the calculation of elevation of unknown benchmark,…

Answered: Station Backsight (m) Foresight (m)…

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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Surveying Question:

A differential leveling circuit starts at benchmark Concrete Benchmark (Elevation=232.051m) goes out to an unknown benchmark and then continues to a known control point (Elevation=227.975m). Two turning points are used with the measurements included in the attached table.

Determine the elevation of the unknown benchmark
Determine the order and class of the survey.

For First order Class 1:

Allowable Error= +/- 4(K)^1/2
Range of Constant= m less than/equal to 4

For First Order Class 2:

Allowable error= +/- 5(K)^1/2
Range of constant= m greater than/equal to 4, and m less than equal to 5 (between 4 and 5)

For Second Order Class 1:

Allowable error = +/- 6(K)^1/2
Range of Constant = m greater than/equal to 5, and m less than equal to 6 (between 5 and 6)

For Second Order Class 2:

Allowable error = +/- 8(K)^1/2
Range of Constant = m greater than/equal to 6, and m less than equal to 8 (between 6 and 8)

For Third Order, Any Class:

Allowable Error = +/-12(K)^1/2
Range of Constant = m greater than/equal to 8 and m less than/equal to 12 (between 8 and 12)

Station
Backsight (m) Foresight (m) Distance (m)
Concrete B.M.
TP1
2.052
4.201
3.296
1791
Unknown B.M.
0.952
2482
6.388
Control Point
1.586
1346

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