A tall concrete is an obstruction along a level route between points A and B. To proceed with the leveling work, an inverse method of leveling is executed at the vicinity of the obstruction where rod readings were taken with the rod held upside down as shown in the figure. From the observed data portrayed in the figure, determine the elevation of point B. Bottom of Rod Held Flushed with top of Wall Leveling Rod (Held upside down) Leveling Rod- -Leveling Rod (Hold upside down) 3.05 m 1.60 m Concrete Wall 4.92 m 3.68 m Tst Setup of Instr. Elov, 528.25m 2nd Setup of tnstr. а. 526.30 m b. 524.30 m с. 525.30 m d. 527.30 m e. not included on the list

A tall concrete is an obstruction along a level route between points A and B. To proceed with the leveling work, an inverse method of leveling is executed at the vicinity of the obstruction where rod readings were taken with the rod held upside down as shown in the figure. From the observed data portrayed in the figure, determine the elevation of point B. Bottom of Rod Held Flushed with top of Wall Leveling Rod (Held upside down) Leveling Rod- -Leveling Rod (Hold upside down) 3.05 m 1.60 m Concrete Wall 4.92 m 3.68 m Tst Setup of Instr. Elov, 528.25m 2nd Setup of tnstr. а. 526.30 m b. 524.30 m с. 525.30 m d. 527.30 m e. not included on the list

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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A horizontal collimation test is performed on an automatic level following the procedures described in Section 4.15.5. With the instrument setup at point 1, the rodreading at A was 3.886 ft, and to B it was 3.907 ft. After moving and leveling the instrument at point 2, the rod reading to A was 4.094 ft and to B was 4.107 ft. What isthe collimation error of the instrument and the corrected reading to A from point 2?
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