16
8) Without turning the laser level, move the laser level towards
wall
B
and position it approximately 0.5 meter from wall
B
.
9) Verify that the vertical line passes through
a1
and
b1
.
10) On wall
B
, mark the center of the cross beams as
b2
(see figure# 3).
11) Turn the laser 180°. Reposition the laser and verify that the
2 vertical lines pass through
b2
and
a1
.
12) On wall
A
, mark the center of the cross beams as
a2
(see figure # 4).
A
B
Figure # 3
C
a1
0.5m
X
2m
b1
X
b2
X
