Civil Engineering - Surveying - Discussion
Discussion Forum : Surveying - Section 2 (Q.No. 29)
29.
A back sight
Discussion:
3 comments Page 1 of 1.
ABHAY said:
10 years ago
Q1 RL 30.5 (factory floor)staff reading of floor 1.61 staff reading when staff is inverts with bottom touching tie beam of truss is 3.7 m find height of tie beam above floor,
Khan said:
5 years ago
What about the 3rd point please explain anyone ?
Ashik said:
3 years ago
@Khan.
Taken on an inverted staff is treated as negative.
Its known elevation is above. As like a shade with 2.10m in height. Then inverted staff is used to measure downwards from shade to the below point. So the reading is negative & the Value is subtracted.
Taken on an inverted staff is treated as negative.
Its known elevation is above. As like a shade with 2.10m in height. Then inverted staff is used to measure downwards from shade to the below point. So the reading is negative & the Value is subtracted.
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