Measuring Height using Vertical Angle in Surveying

Measuring Height using Vertical Angle in Surveying

Equipment used to measure the height of an object using a vertical angle

Theodolite, Leveling Stop, Tape or Chain, Pegs, Plumb bob
Procedure to measure the height of an object using a vertical angle.( Using theodolite)*

1. Setup the instrument at station P.

2. Perform all temporary adjustments.

3. Bring the line of collimation horizontal (vertical angle reading is zero).

4. Sight the top of the object (A), and read the vertical angle α1.

5. Sight the bottom of the object B, and read the vertical angle α2.

6. Measure the Horizontal distance between the instrument station and the object (D).

7. Calculate the height of the object as follow



h1 = D tan α1

h2 = D tan α2

The object height = h1 + h2

This is the method to find the height of an object using a vertical angle by using a theodolite instrument.

:small_blue_diamond:Difference between stirrups and ties -

The 'U' or 'box' shaped reinforcement which is perpendicular to the main reinforcement in a beam is termed as STIRRUP.

The reinforcement which is perpendicular to the main reinforcement in a column is termed as TIE.

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