a) agr sactar sats its ingusuhents in surveying.b) The readings (2.312, 1.185, -2.365, 0.195, 0.885, 1.345, 0.905) were takenwith a level. The instrument was shifted after the 4 reading. The negativereading was taken with the staff inverted from a point below a sunshade.Find the reduced levels of all the points if the first reading was to a BM ofassumed RL 100.00.

point back bearing fore bearing height of instrument elevation of point remark 100 BM…

Answered: The readings (2.312, 1.185, -2.365,…

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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Q#1: A profile levelling is carried out and consecutive readings were observed on staff rod along a chain line at common interval of 10 meter which are listed below in table. First reading is taken on bench mark of 105.615 meter reduce level. Station Points Chainage (m) Staff Readings (m) Remarks BS IS FS 1 00 3.005 BM 2 10 2.285 3 20 1.560 4 30 1.785 5 40 2.105 6 50 2.875 3.105 CP 1 X 53.35 3.465 7 60 3.955 8 70 3.120 9 80 3.015 10 90 2.580 11 100 1.955 CP 2 Determine the reduce levels of all points using both line of collimation and rise and fall method. (Present your answer in table form).
24) In a two peg test using a dumpy level, the following observations were taken ROD READING INSTRUMENT SET-UP AT C INSTRUMENT SET-UP AT D A 1.153 0.586 0.991 0.257 Point C is equidistant from A and B and D is 3m from A and 74m from B. a. With the level position at D, to what rod reading on B should line of sight be adjusted? b. What is the corresponding rod reading on A for a horizontal line of sight with instrument still at D?
a) In the process of taking a rod reading, one can eliminate parallax mathematically. Parallax is basically a systematic error. True False b) The page check in the field notes is a quality control measure to determine if the user satisfied 1st order class I leveling. True False C) The upper cross hair reading was 8.00 ft. The lower cross hair reading was 6.00 ft. The stadia constant was 100. The horizontal distance from the center of the level to the face of the level rod = 200.0 ft. True False
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 differential levelling circuit began on BM Mil and closed at BM Oak with the elevations indicated in the figure below. The plus sight and minus sight distances were kept approximately equal. Readings (in feet) are described below. Prepare, Check and adjust the notes. BM Mill Eleviz 2053.18 1.33 HI=2054.51 8.3 тр1 0,22 HI=2046.36 7.91 TP2 0.96 11.72 0.46 TP3 Mean sea level 8.71 BM Oak
Example Method of repetition was followed to measure the horizontal angle < ABC by a theodolite, and the field measurements were From To No. of Rep. F.L. F.R. A 00° 00' 00" 180° 00' 00" 18° 33' 10" 198° 33' 20" 18° 33' 15" | 198° 33' 25" B 37° 06' 30" 217° 06' 40" A 37° 06' 35" 217° 06' 37" C 55° 39' 52" 235° 39' 56" A 55° 39' 56" 2350 39' 54" B C 74 13' 08" 254° 13' 14" Find the precise value for the horizontal angle < ABC 2. B.
In a two-peg test using a dumpy level, the following observations were taken ROD READING INSTRUMENT SET-UP AT c INSTRUMENT SET-UP AT D A 1.153 0.586 0.991 0.257 Point C is equidistant from A and B and D is 3 m from A and 73 m from B. a. With the level position at D, to what rod reading on B should line of sight be adjusted? b. What is the corresponding rod reading on A for a horizontal line of sight with instrument still at D?
a) 0.700 The following readings were taken in sequence during a leveling job: Readings (m) 1.250 1.285 1.125 0.810 1.555 -1.400 1.235 0.665 1.905 Remarks BMI R.L. = 101.335 Peg A Peg B 2 Change Point CP2 Change Point CP2 BM2 R.L=103.879 -1.400 Change Point CP1 Change Point CP1 CGS 1905 Inverted staff reading taken to the underside of a bridge Peg C Prepare a standard form of booking for these readings and reduce them using the rise fall method applying all the necessary arithmetic checks and adjust the final Reduced Levels.
Example Method of repetition was followed to measure the horizontal angle < ABC by a theodolite, and the field measurements were From То No. of Rep. F.L. F.R. 00° 00' 00" 180° 00' 00" B 18° 33' 10"| 198° 33' 20" 189 33' 15" 198 33' 25" в C 37° 06' 30" 217° 06' 40" A 37° 06' 35" 217° 06'37" B 3 C 55° 39' 52" 235° 39' 56" 55° 39' 56" 235° 39' 54" B 74° 13' 08" 254° 13' 14" Find the precise value for the horizontal angle < ABC
Prob.59. The following readings were observed with a dumpy level 0.795, 1.535, 2.855, 3.125, 0.945, 0.635, 0.555, 0.230, 1.550, 0.995, 2.015 The instrument was shifted after 4th and 8th readings. The first reading was taken on a B.M. of RL 608.400. Write down the page of a level field book by making entries of above readings. Calculate R.L.s of the points. Find the difference of levels between the first and last points.
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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