15
5) Turn the laser 180° towards wall
B
, and mark on the wall
the center of the cross lines as
b1
(see figure 2).
6) Move the laser level towards wall
B
and position it
approximately 0.5 meter from wall
B
.
7) Mark on wall
B
the center of the cross lines as
b2
(see figure 3).
Figure # 2
Figure # 3
