The readings obtained from a two-peg test carried out on an automatic level with a staff placed on two pegs A and B 50 m apart are: With the level midway between A and B Staff reading at A = 1.283 m %3D Staff reading at B = 0.860 m %3D • With the level positioned 5 m from peg B on line AB extended Staff reading at A = 1.612 m 1.219 m Staff reading at B = %3D Calculate the collimation error of the level per 50 m sighting distance and the hori- zontal reading that should be observed on the staff at A with the level in position 5 m from B.

The readings obtained from a two-peg test carried out on an automatic level with a staff placed on two pegs A and B 50 m apart are: With the level midway between A and B Staff reading at A = 1.283 m %3D Staff reading at B = 0.860 m %3D • With the level positioned 5 m from peg B on line AB extended Staff reading at A = 1.612 m 1.219 m Staff reading at B = %3D Calculate the collimation error of the level per 50 m sighting distance and the hori- zontal reading that should be observed on the staff at A with the level in position 5 m from B.

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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Concept explainers

Methods of Surveying

Surveying is the practice to determine the relative three-dimensional positions of various points on the earth’s surface. This is done by computing the vertical and horizontal distances, angles between the points, collecting the observations, and plotting them on a map of any appropriate scale. Accuracy can be achieved by using the latest instruments like a theodolite, tachometer, etc. Leveling is a subdivision of surveying where the objective is to locate the elevation of objects considering a datum level.

Question

The readings obtained from a two-peg test carried out on an automatic level with a
staff placed on two pegs A and B 50 m apart are:
• With the level midway between A and B
Staff reading at A = 1.283 m
%3D
Staff reading at B = 0.860 m
With the level positioned 5 m from peg B on line AB extended
Staff reading at B = 1.219 m
%3D
Staff reading at A = 1.612 m
%3D
%3D
zontal reading that should be observed on the staff at A with the level in position 5 m
from B.
Calculate the collimation error of the level per 50 m sighting distance and the hori-

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