ABSTRACT
When the pegging out has been checked, profiles are set up clear of the trench runs and the positions of the ranging lines transferred to them. Fig 3 profiles consist of horizontal boards fixed to stout posts, the position of the wall and trench being marked on the boards by sawcuts. Profiles are placed at all corners and at the ends of the cross walls Fig 4. The positions of trenches and walls can be obtained from lines strained between them Fig 5.
