Week 11

The below image shows a simple L-Shaped building which needs setting out for construction. Using the table below, calculate the necessary data required to go into the field and set out the building. Once you have the necessary data, proceed to the field and set out the building. Ensure that you complete all necessary checks once completed.

Equipment Required

Process

1) Set up the theodolite where you have enough set out the building, without interrupting other groups.

2) Place a ranging rod approximately 20m away from the theodolite in the direction we want our 0 Horizonal angle to be.

3) Sight to the centre of the ranging rod and set the horizontal angle to 0.

4) Point the instrument to the angle of point A from the table above and turn on the horizontal locks.

5) Measure from the centre of the optical plummet (on the ground directly below the theodolite) out in the direction the scope is facing to the distance of point A.

6) The person on the instrument should then look through the scope and guide the person on the tape to the correct angle.

7) Once both parties are happy with the positioning the peg is hammered into the ground.

8) Repeat steps 4-7 for building points B to F.

Checks:

1) Run the tape around the outside of the pegs, and the shape of the building should be clear.

2) Measure the lengths of each side to check against the drawing.

3) Calculate the hypotonus’s and measure from positions A C and D F.

Helpful tips

Use hand signals to communicate where to place the pegs for the building. The theodolite user should put their hand out in the direction they wish the peg to be moved and use:

- Pinching fingers to indicate small movements

- Open plans to indicate large moments

Results Table

Practical Video Guide