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.

Vertical angle to Q = 5°30'Vertical angle to R = 1°08'Cross-hair readings at Q ⇒ 2.105, 2.47 and…

Answered: A tacheometer was set up at station P…

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 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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