The correct readings of rod which are necessary on the batter board tops to set them properly. 5.61 f t Given: Floor elevation 1069.31 f t Benchmark A = 1070.58 f t Sight A = 5.34 f t Concept Used: This is one more method of layout of buildings, is to stake two points on the building, one of them with the total station instrument, take a backsight on the other and stack all the remaining points from that setup using pre -calculated angles and distances. Calculation: Calculate the height of instrument by adding bench mark A and sight A : H I = 1070.58 + 5.34 H I = 1075.92 f t Calculate the elevation value for batter roads by using the formula: E b = F l o o r e l e v a t i o n + 1 f t E b = 1069.31 + 1 E b = 1070.31 f t Now, we must determine the rod reading value at the batter rods by: S b b = E b − H I S b b = 1070.31 − 1075.92 S b b = − 5.61 f t Conclusion: Therefore, the rod readings are necessary on the batter board tops to set them properly is 5.61 f t .

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Chapter 23, Problem 23.18P

To determine

The correct readings of rod which are necessary on the batter board tops to set them properly.

5.61ft

Given:

Floor elevation 1069.31ft

Benchmark A=1070.58ft

Sight A=5.34ft

Concept Used:

This is one more method of layout of buildings, is to stake two points on the building, one of them with the total station instrument, take a backsight on the other and stack all the remaining points from that setup using pre -calculated angles and distances.

Calculation:

Calculate the height of instrument by adding bench mark A and sight A :

HI=1070.58+5.34HI=1075.92ft

Calculate the elevation value for batter roads by using the formula:

Eb=Floor elevation+1 ftEb=1069.31+1Eb=1070.31ft

Now, we must determine the rod reading value at the batter rods by:

Sbb=Eb−HISbb=1070.31−1075.92Sbb=−5.61ft

Conclusion:

Therefore, the rod readings are necessary on the batter board tops to set them properly is 5.61ft .

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