In order to determine the elevation of top Q of a signal on a hill, observations were made from two stations P and R. The stations P, R and signal Q were on the same plane. If the angles of elevation of the top Q of the signal measured at P and R were 25° 35' and 15° 5' respectively, determine the elevation of the foot of the signal if the height of the signal above its base was 4 m. The staff readings upon the bench mark (RL 105.42) were respectively 2.755 and 3.855 m when the instrument was at P and at R. The distance between P and R was 120 m.

In order to determine the elevation of top Q of a signal on a hill, observations were made from two stations P and R. The stations P, R and signal Q were on the same plane. If the angles of elevation of the top Q of the signal measured at P and R were 25° 35' and 15° 5' respectively, determine the elevation of the foot of the signal if the height of the signal above its base was 4 m. The staff readings upon the bench mark (RL 105.42) were respectively 2.755 and 3.855 m when the instrument was at P and at R. The distance between P and R was 120 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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6. There is a signaling tower on the top of a hill. In order to determine the elevation of the tower top Q, observations were made from two stations P and R. Points P, Q and R lie in the same plane. If angles of elevation of the top point Q from P and R are respectively 24° 30' and 14° 37'. Determine the elevation of foot of tower of signal tower height is 4 m. The staff readings on BM of RL 100 m are 2.085 m and 3.455 m respectively from instrument located at P and R. Distance between P and R is 125 m.
When performing a leveling process for the longitudinal section of a road, the following readings were recorded: The first reading was taken on the leveling number (B.M1), whose Tevel is (60 meters), while the rest of the points were taken on the section points (00+0. 0+50 + 00+ 1... . (While working, lift the device after the fourth, seventh, and tenth reading. Arrange the readings in a table, then complete the table and verify the correctness of the calculations. Draw the segmént and establish a slope line inclined by 0.4% - and its level at the beginning of the project is 60 meters. Find the burial depth in each station. " Reading sequence 1 2 3 4 5 6 7 8 9 10 11 12 13 Reading the ruler 1.35 1.72 1.98 2.05 2.17 2.76 2.98 0.67 1.78 2.48 |2.88 3.10 3.39|
Two pegs A and B are driven in the ground at a distance of abour 120 m. A dumpy level is set up at station Q exactly mid-way between pegs A and B. The staff readings on peg A and B were found to be 3.513 m and 3.149 m. The instrument was then moved and set up at a point P beyond peg A, in line BA produced at a distance of 20 m from A. The staff readings on pegs A and B were 1.763 m and 0.847 m respectively. What is the true difference in elevation between the two points? With the level in the same position at P what rod readings on B should the line of sight is adjusted. Check these reading against the true difference in elevation previously SOLVE THE FOLLOWING PROBLEMS: Problem Sketch Solution Answer
Two pegs A and B are driven in the ground at a distance of abour 120 m. A dumpy level is set up at station Q exactly mid-way between pegs A and B. The staff readings on peg A and B were found to be 3.513 m and 3.149 m. The instrument was then moved and set up at a point P beyond peg A, in line BA produced at a distance of 20 m from A. The staff readings on pegs A and B were 1.763 m and 0.847 m respectively. What is the true difference in elevation between the two points? With the level in the same position at P what rod readings on B should the line of sight is adjusted. Check these reading against the true difference in elevation previously determined. a. Sketch b. Solution C. Answer
A tacheometer was set up at station P and observations were made to two stations Q and R. The vertical angles to Q and R were 5°30’ and 1°08’ The cross-hair readings at Q were 2.105, 2.47 and 2.835 and those at R were 2.215, 2.56 and 2.905. The staff were held vertical in both cases. The instrument constants were 100 and 0.3. The reading from P to a BM of RL 285.35m was 2.255. The horizontal angle QPR measured was 58°30’. Find the distance QR, the gradient from Q to R and the RLs of Q and R.
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Question: 1 To determine the elevation of station A, the following observation were taken, the rod held vertically. The instrument fitted with Anallatic lens and value of constant was 100. Inst. Station Height of instrument Staff Station Vertical angle Staff Reading Remarks O 1.440 B.M - 5o40’ 1.332 1.896 2.460 R.L of BM = 158.205 m B 1.440 C.P +8o 20’ 0.780 1.263 1.746 A 1.380 C.P -6o 24’ 1.158 1.617 2.076 subject: Engneering surveyin 1