3. In the figure below, a vertical angle of -14°30' is read to a target 1.75 m above point M. The measured inclined distance (S) is 644.15 m and the elevation of point K is 320.70 m above mean sea level. If the height of instrument at K is 1.27 m, the elevation of M, considering effects of the earth's curvature and atmospheric refraction, is? HORIZONTAL LINE HI = 1.27 m S= 644.15 m M RR = 1.75 m DATUM (MEAN SEA LEVEL) Elev K = 320.70 m DE -14°30

3. In the figure below, a vertical angle of -14°30' is read to a target 1.75 m above point M. The measured inclined distance (S) is 644.15 m and the elevation of point K is 320.70 m above mean sea level. If the height of instrument at K is 1.27 m, the elevation of M, considering effects of the earth's curvature and atmospheric refraction, is? HORIZONTAL LINE HI = 1.27 m S= 644.15 m M RR = 1.75 m DATUM (MEAN SEA LEVEL) Elev K = 320.70 m DE -14°30

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

Compute the combined effects of curvature and refraction on level sights of 20, 200, 400, 800, and 1600 ft.
TRIGONOMETRIC LEVELING. A vertical angle of -12°25’ is measured to the top of a water tank from an instrument set up on a hill 585.00 meters away from it. The telescope of the instrument is 1.45 m above the ground whose elevation is 462.73 m. Making due allowance for the earth’s curvature and atmospheric refraction, determine the elevation of the base of the water tank is the tank is 32.0 m high. with complete solution adn figure of the said problem
Based from the Figure, a vertical angle of +13°45’ is read to a target 1.23 m above point B. The measured inclined distance S is 823.29 m and the elevation of point A is 123.65 m above the datum. The height of the instrument at A is 1.35 m. Consider the effect of earth’s curvature and refraction. Determine the difference in elevation between A and B Determine the elevation of B
Point A is in between points B and C, the distances of B and C from B and C from point A are 1000m and 2000m respectively measured from point A. The angle of elevation of point B is 18°13' while that of C as Ø. The difference in the elevation of B and C is 44.4m. Considering the effects of curvature and refraction, what is the value of Ø? (Note: Assume that point C is higher) where: Earth's Curvature and Atmospheric Refraction Correction (Her): Her(m) = 0.067 K² K (km) = level distance Her K Vertical line Horizontal line Level line
For all the computed values with decimals, use four (4) digits after the decimal. An instrument is set-up at point M and vertical angles are observed at N (-21°15’) and O (+33°45’). The height of instrument from point M is 1.5865m. The horizontal distance of NM and NO are 353.2552m and 937.5565m respectively. If point O is at elevation 621.6453m, Determine the elevation of N neglecting the effects of curvature and refraction. Determine the elevation of N making due allowance for curvature and refraction.
What is the elevation of point A in the below figure, if you know that the elevation of point B is 86.53 m? (take in your account curvature and refraction error)
Determine the combined effect of curvature and refraction on level sights of 30, 50, 100, 250, 300, 500, 1000, and 2000 m.
A vertical angle of -14°30' is read to a target 1.75 m. above point M. The measured inclined distance (S) is 644.15 m. and the elevation of point K is 320.70 m. above mean sea level. If the height of instrument at K is 1.27 m., determine the elevation of M, considering the effects of the earth's curvature and atmospheric refraction.
Draw a free body diagram :Topic Trigonometric leveling A transit is set up at point B which is between A and B. The vertical angle observed towards A is known to be -20° and that of C is +12°. The horizontal distance between A and B is 642.80 m and that of B and C is 1032.40 m. The height of instrument is 1.5 m above B with A having an elevation of 146.32 m. Considering the effect of curvature and refraction correction. a) Compute the difference in elevation between A and B. b) Compute the difference in elevation between A and C. c) Compute the elevation of B.
Three hills A, B and C are at elevation 135m, 146m, and 154m respectively above sea level. Distance AB is 3.9 km while distance BC is 3.1km. Find the effect of curvature and refraction between A and B Determine the effect of curvature and refraction between A and B What would be the height of the tower to be constructed at hill C so that the line of sight will clear hill B by 2.5 m considering the effect of earths curvature and refraction?
Readings on a line of differential levels are taken to the nearest 2 mm. For what maximum distance can the Earth’s curvature and refraction be neglected?
Point A is in between points B and C. The distances of B and C from point A are 1000m and 2000m respectively. Measured from point A, the angle of elevation of point B is 18deg30’ while that of C is 8deg15’. Find the difference in elevation between B and C considering effects of curvature and refraction. a. 44.4 m b. 32.21 m c. 46.43 m d. 42.14 m