Please note: This value is editable in the 'Height above HRL' box in the 'Create Backtie' window, and will display the backtie height above HRL, not from Top of Foundation. See image below.
A number that has a value of 0 or greater, expressed in metres.
Default Setting: 6.1m
Changing properties: If you wish to change the option of this property, your Project Settings Administrator must request a project settings change.