Recording and Working Out Reduced Levels are Crucial to Site Levelling Success.

How to Book Height of Collimation Levels

Always Start with the Date and Description of the Levelling Exercise Being Done.

How to Book Height of Collimation Levels

Write Down your Reduced Level for Datum A. Take Your 1st Staff Reading and note down in the 1st Back Sight Column.

How to Book Height of Collimation Levels

Note down the Staff Readings for the Intermediate Sights. And note down the last staff reading of this setup in the Fore Sight Column.

How to Book Height of Collimation Levels

After moving the Level and setting up again, read the staff and record in the Back Sight Column. The last staff reading on this setup will be recorded in the Fore Sight Column.

How to Book Height of Collimation Levels

After moving the Level and setting up again, read the staff and record in the Back Sight Column. Record any Intermidiate Staff Readings. The last staff reading on this setup will be recorded in the Fore Sight Column.

How to Book Height of Collimation Levels

Add your first reading to the Reduced Level of Datum A. Write this in the Collimation Column. Take away your next readings away from the Collimation Height and Write in the Reduced Level Column.

How to Book Height of Collimation Levels

Add the Back Sight Reading to the Reduced Level of point D and write in the Collimation Column.

Take away any Intermediate sight readings from the Collimation Level and write down in the Reduced Level Column. Take away the final Fore Sight reading from the Collimation Level and write down in the Reduced Level Column.