# Civil Engineering - Surveying - Discussion

Discussion Forum : Surveying - Section 1 (Q.No. 2)

2.

If

*h*is the difference in level between end points separated by*l*, then the slope correction is . The second term may be neglected if the value of*h*in a 20 m distance is less thanDiscussion:

67 comments Page 1 of 7.
Vijay patel said:
1 decade ago

Second term neglect and l = 20.

So h2 = 2L.

h2 = 2*20.

h = 3.3m.

Near equal to 3m.

So h2 = 2L.

h2 = 2*20.

h = 3.3m.

Near equal to 3m.

NamrathaSai said:
1 decade ago

Would you please explain the calculations! Why are you taken that h2/2l=1?

Aman said:
1 decade ago

If we use any value lesser than 3 and not greater than 3, then answer for slope correction either using the complete formula given above or by eliminating the second term, we will get the same answer. Thus it means that the second term can be eliminated the right answer is 3 and distance kept as 20m.

VIVEK CHANDEL said:
10 years ago

For slopes of 10 percent or less, the correction to be applied to L for a difference d in elevation between tape ends, or for a horizontal offset d between tape ends, may be computed from,

Cs=(h^2)/(2L).

For a slope greater than 10 percent, Cs may be determined from,

Cs={(h^2)/(2L)}+{(h^4)/8(L^3)}.

Cs=(h^2)/(2L).

For a slope greater than 10 percent, Cs may be determined from,

Cs={(h^2)/(2L)}+{(h^4)/8(L^3)}.

Nanda said:
10 years ago

@Vijay patel.

h2 = 2*20

h square = 40.

How come h = 3.3?

h2 = 2*20

h square = 40.

How come h = 3.3?

Rashmi said:
10 years ago

How 3.30?

Ramu said:
10 years ago

Answer is 1

From answer verification, If we substitute 1/2 in second term then it will negligible compared to other.

From answer verification, If we substitute 1/2 in second term then it will negligible compared to other.

Siva said:
10 years ago

h2 = 40 root 40 = 6.32.

How can you get 3.3?

How can you get 3.3?

Raju said:
9 years ago

h square = 40.

Square root of 40 = 6.32 or 6.33.

How get it 3.3?

Square root of 40 = 6.32 or 6.33.

How get it 3.3?

AKSHAY VASHISHT said:
9 years ago

Second term is neglected for slope less than 10%.

Slope for given problem for:

C) (2/20)*100 = 10%.

D) (3/20)*100 = 15%.

So for h = 2 m or less it is neglected.

And for h = 3 m it will be taken into account.

Slope for given problem for:

C) (2/20)*100 = 10%.

D) (3/20)*100 = 15%.

So for h = 2 m or less it is neglected.

And for h = 3 m it will be taken into account.

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