It is a self-reading graduated wooden rod having rectangular cross section. The lower end of the rod is shod with metal to protect it from wear and usually point of zero measurement from which the graduations are numbered. Staff are either solid (having single piece of 3 meter height) (Figure 11.5) or folding staff (of 4 meter height into two or three pieces) (Figure 11.6). The least count of a leveling staff is 5 mm.
Figure 11.5 Single Piece 3 m staff |
Figure 11.6 Folded 4 m staff |
