4. A transit with a stadia interval factor of 100.8 was set up at C with elevation of 548 m. and the following stadia readings were observed at points A and B: HAIR READINGS VERTICAL POSITION OF ROD AZIMUTH UPPER MIDDLE LOWER ANGLE (а 1.33 m (b) 1.020 m 125 ° 36' 255 ° 40' 15° 35' - 8° 08' Rod held at A 1.175 m Rod held at B 1.972 1.854 1.736

4. A transit with a stadia interval factor of 100.8 was set up at C with elevation of 548 m. and the following stadia readings were observed at points A and B: HAIR READINGS VERTICAL POSITION OF ROD AZIMUTH UPPER MIDDLE LOWER ANGLE (а 1.33 m (b) 1.020 m 125 ° 36' 255 ° 40' 15° 35' - 8° 08' Rod held at A 1.175 m Rod held at B 1.972 1.854 1.736

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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A transit with a stadia interval factor of 100.8 was set up at C with elevation of 548 m. and the following stadia readings were observed at points A and B: VERTICAL ANGLE HAIR READINGS MIDDLE LOWER (b) POSITION OF ROD AZIMUTH UPPER (a) Rod held at A 125 ° 36' 15° 35' 1.33 m 1.175 m 1.020 m Rod held at B 255 ° 40' - 8 ° 08' 1.972 1.854 1.736 If the stadia constant is 0.381 m. determine the following: a. Elevation at points A and B if HI at C is 1.25 m. b. The distance of line AB c. Grade from point A to point B
A line of three wire differential levels goes from benchmark Gloria to benchmark Carey. The length of the line was determined to be 1487 m. The instrument had a stated compensator accuracy of ± 1.5 mm/km. The instrument-rod combination had an estimated reading error of ±0.2 mm per 40 m. Sight distances were consistently kept to approximately 50 ± 5 m. If the observed difference in the elevation in 23.4516m, what is the estimated error in the final elevation difference?
A Reciprocal leveling is observed across a wide river and the reciprocal level readings were takenbetween points A and B as follows. With instrument set up near A, the rod readings on A are 2.283 mand 2.285 m. The reciprocal level readings on the opposite side of the river at point B are 3.618, 3.619,3.621 and 3.622 m. With the instrument set up near B the rod readings on B are 4.478m and 4.476 m,and the rod readings on the on the opposite side of the river at point A, the rod readings are 3.143,3.140, 3.146 and 3.144.a.Compute the difference in elevation between A and B with the instrument set up near A.b.What is the true difference in elevation between A and B?c.If the elevation A is 300 m, what is the elevation of B?
Q3 /B/ The following tacheometric observations were made on the point D from station A, which has a height of 1.50 m above and reduced level 56.77m Staff position Staff reading(m) Vertical angle reading D 3.240, 3.047, 2.853 88°38'53" Calculate: (i) the reduced level of points D and the horizontal length of AD.
A reciprocal leveling is observed across a wide river and the reciprocal level readings were taken between points A and B as follows. With instrument set up near A, the rod readings on A are 2.283 m and 2.285 m. The reciprocal level readings on the opposite side of the river at point B are 3.618, 3.619, 3.621 and 3.622 m. With the instrument set up near B the rod readings on B are 4.478 m and 4.476 m, and the rod readings on the on the opposite side of the river at point A, the rod readings are 3.143, 3.140, 3.146 and 3.144. a) Compute the difference in elevation between A and B with the instrument set up near A. b) What is the true difference in elevation between A and B? c) If the elevation A is 300 m, what is the elevation of B?
A line of three-wire differential levels goes from benchmark Gloria to benchmark Carey. The length of the line was determined to be 2097 m. The instrument had a stated compensator accuracy of pm 1.4 mm/ km. The instrument–rod combination had an estimated reading error of 0.4 mm per 40 m. Sight distances were kept to approximately 50 5 m. If the observed difference in elevation is 15.601 m, what is the estimated error in the final elevation difference? If benchmark Gloria had a fixed elevation of 231.071 m and Carey had a fixed elevation of 246.660 m, did the job meet acceptable closure limits at a 95% level of confidence? Justify your answer statistically.
A reciprocal leveling is observed across a wide river and the reciprocal level readings were taken between points A and B as follows. With instrument set up near A, the rod readings are 3.411m and 3.414 m. The reciprocal level readings on the opposite side of the river at point B arev 4.281, 4.284, 4.283 and 4.285m. With the instrument set up near B the rod readings on the opposite side of the river at point A, the rod readings are 3.153, 3.150, 3.156 and 3.154. a. Compute the difference in elevation between A and B with the instrument setup near A. b. If the elevation A is 100m, what is the elevation at B?
A Tachometer is set up at an intermediate point on a survey line PQ and the following observations were made on a vertically held staff. Staff intercept 1.235 m 1.115 m Axial hair readings 2.445 m 1.335 m Staff station Vertical angle 15° 20 ' 50" 12° 40 ' 10 " i) Compute length of the line PQ. 2.5 ii) Compute R.L of Q, if R.L of P is 189.66 m 2.5
The following tacheometric observations were amde on two points P and Q from station A. Staff at Vertical Angle Staff Reading Upper Middle Lower P -5°12' 1.388 0.978 0.610 +27°35' 1.604 1.286 0.997 The height of the tacheometer at A above the ground was 1.55m. Determine the elevations of P and Q if the elevation of A is 75.5 m. The stadia constant k and c are respectively 100 and 0.0m. Show an illustration of your work.
A tachometric surveying was conducted to obtain some readings forinaccessible points, where it was found that the multiplying and additiveconstants are 98 and 0.1, respectively. The instrument was setup at point C and the readings listed in the table were taken while the staff was held vertically. Calculate the horizontal distance between BM and station D. Also, calculate the reduced level of station D. Figure 1 shows a schematic view of the site.
Distance between the two points Pand Q was required to be determined from tacheometer fitted with an anallactic lens (k = 100, C = 0). With the instrument at P and staff at Q, the observations made were a vertical angle of + 8°43' and staff intercept of 1.805 m held vertical. At a later stage, it was found that constants of the tacheometer were 100.5 and 0.7. What would be the percentage error in the computed distance PQ? %3D
Q.2 Reciprocal leveling was conducted across a wide river to determine the difference in level of points A and B, A situated on one bank of the river and B situated on the other .The following results on the staff held vertically at A and B from level station I and 2, respectively were obtain . The level station I was near to A and station 2 was near to B. Instrument at Staff reading on A 1.475 1.161 Staff reading on B 1.715 1.4 (1) If the reduce level of B is 71.18 m above the datum, what is the reduced level of A? (2) Assuming that the atmospheric conditions remain unchanged during the two sets of the observation, calculate (i) the combined curvature and refraction correction if the distance AB is 315 m, (ii) the collimation error?