Defines the default value of the Top of Foundation (ToF) above or below HRL (High Rail Level).
For example, if the HRL of the associated structure is 30 metres, and the foundation height is 0.5 metres, this means the default Top of Foundation, displayed in the 'ToF' box below, would be 30.5 metres.
Alternatively, if the HRL is 30 metres and the foundation height is -0.5 metres, the Top of Foundation value displayed would be 29.5 metres.
Options:
Any number expressed in metres.
Default Setting: 0.0 metres (i.e. equal to HRL)
Changing properties: If you wish to change the option of this property, your Project Settings Administrator must request a project settings change.