Three hills A, B, and Care at elevations 135m, 146m, and 154m respectively above sea level. Distance AB is 3.9km while distance BC is 3.1km. a) Find the effect of curvature and refraction between A and B. b) Determine the effect of curvature and refraction between A and B. c) What would be the height of tower to be constructed at hill Cso that the line of sight will clear hill B by 2.5mconsidering the effect of earth's curvature and refraction?

Three hills A, B, and Care at elevations 135m, 146m, and 154m respectively above sea level. Distance AB is 3.9km while distance BC is 3.1km. a) Find the effect of curvature and refraction between A and B. b) Determine the effect of curvature and refraction between A and B. c) What would be the height of tower to be constructed at hill Cso that the line of sight will clear hill B by 2.5mconsidering the effect of earth's curvature and refraction?

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

A BS of 5.43 ?? is taken on a level rod at a distance of 120 ??, and a FS of 8.76 ft is taken on the rod held 1,100 ?? away. a. What is the error caused by the Earth’s curvature and atmospheric refraction for the BS and FS? b. What are the correct BS and FS elevations?
Four hills A, B, C and D are in straight line. The elevations are A = 247 m, B = 236 m, C = 314 m D = 396 m respectively. The distances of B, C and D from A are 12 km, 45 km and 60km respectively. Considering the effect of curvature and refraction of the earth. (a) Compute the height of equal towers on A and D to sight over B and C with a 3 m clearance.(b) Compute the elevation of the line of sight at B with the installation of equal heights of tower at A and D.(c) Compute the height of tower at A with a clearance of 3 m at C so that D will be visible from A, if the height of tower at D is 2 m.
A levelling staff is held vertical at distance of 100 mm and 300 mm from the axis of a tacheometer and the staff intercept for the horizontal sight are 0.99 m and 3.00 m respectively. Find the constant of the instrument. The instrument set up at station A and the staff held vertical at point B. With the telescope inclined at a depression angle 10° to horizontal the reading on the staff are 2.670, 1.835, 1.0 m. Calculate the RC of B and its horizontal distance from A. (Given that HI = 1.42 m, and RL of A = 450.5 m)
Determine the horizontal distance from Bm1 to TP1 in meters Determine Elevation of TP1 in meters
Example To find difference in elevations between two points P and g situated on the opposite banks of river, reciprocal levelling was done and the following readings were noted. Instrument Station P Staff reading Q Remarks P 1.824 2.748 Q 0.928 1.606 R.L. of P = 120.25 m Find R.L. of Q. Also find the combined correction for curvature, refraction and collimation adjustment. distance between P and Q = 1010 m
Determine the value of angle Q.
Fundamentals of Surveying problem
pls answer asap
With the aid of three instrument positions and four staff positions explain the difference between the height of collimation and rise & fall method in engineering survey
1. Two point A and B are each distance 2000 from a third point C with an elevation of100m, from which the measure vertical angle to Ais +3°30' and to B 1°30'. What isthe difference in elevation between A and B considering the effect of the earth'scurvature and refraction?