I want to what is height of instrument and Rise & fall method of levelling? What is the method to calculate reduced level.
Here, I will be discussing the concrete tile roofing materials. concrete tile: The concrete tile consists of nearly 70% sand, 20% cement, nearly 9% water & only 1%pigment plus some additive. The manufacturing method of concrete tile: Extrusion Wet pressing Core molding & vibration molding. TRead more
Here, I will be discussing the concrete tile roofing materials.
concrete tile:
The concrete tile consists of nearly 70% sand, 20% cement, nearly 9% water & only 1%pigment plus some additive.
The manufacturing method of concrete tile:
- Extrusion
- Wet pressing
- Core molding & vibration molding.
Thank You.
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nikeetasharma
Height of Instrument : It is the method which deals with the obtaining of RL of the line of collimation by adding BS reading of a known RL point. Thus, RL of the line of collimation is called the Height of Instrument. It is always measured from the benchmark. Hence the benchmark is the point on theRead more
It is the method which deals with the obtaining of RL of the line of collimation by adding BS reading of a known RL point. Thus, RL of the line of collimation is called the Height of Instrument. It is always measured from the benchmark. Hence the benchmark is the point on the sea derived from mean sea level.
– method to calculate RL;
height of collimation (H of C) = reduced level(R.L.) + backsight (B.S.)
reduced level (R.L.) = height of collimation (H of C) – foresight (F.S.)
reduced level (R.L.) = height of collimation (H of C) – intermediate sight (I.S.)
It is the method which gives the difference of elevation between consecutive points by comparing each point after the first that immediately preceding it. Rise and fall are indicated by the difference in staff reading. After that RL is found by adding the rise to or subtracting the fall from the reduced level of the preceding point.
– method to calculate RL;
fall (F) = foresight (F.S.) – backsight (B.S.)
fall (F) = intermediate sight (I.S.) – backsight (B.S.)
rise (R) = backsight (B.S.) – foresight (F.S.)
reduced level (R.L.) = precede reduced level + rise (R)
reduced level (R.L.) = precede reduce level – fall (F)
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