On fairly level ground, two points A and B are marked a distance of Lm apart. In soft
ground, two pegs are used, on hard surfaces nails or paint may be used.
The level is set up midway between the points at C and carefully levelled. A levelling staff
is placed at A and B and staff readings S1 (at B) and S2 (at A) are taken.
Two peg test
Stage 1