A temporary benchmark has been established at the soffit of a chejja on a window opening, and its known elevation is 102.405 m above mean sea level. The backsight used to establish the height of the instrument is by an inverted staff reading of 1.80m. A foresight reading with the same staff, held normally, is 1.215m on a recently constructed plinth. The elevation of the plinth is

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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Q.55
A temporary benchmark has been
established at the soffit of a chejja
on a window opening, and its known
elevation is 102.405 m above mean sea
level. The backsight used to establish
the height of the instrument is by an
inverted staff reading of 1.80m. A
foresight reading with the same staff,
held normally, is 1.215m on a recently
constructed plinth. The elevation of the
plinth is
Transcribed Image Text:Q.55 A temporary benchmark has been established at the soffit of a chejja on a window opening, and its known elevation is 102.405 m above mean sea level. The backsight used to establish the height of the instrument is by an inverted staff reading of 1.80m. A foresight reading with the same staff, held normally, is 1.215m on a recently constructed plinth. The elevation of the plinth is
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