A
a1
X
0.5m
6) Turn the laser 180° towards wall B. Reposition the laser and
verify that the 2 vertical lines pass through a1 and c1.
7) Mark on wall B the center of the cross beams as b1
(see figure # 2).
A
180°
X
a1
X
0.5m
approximately 5m
C
c1
X
2m
Figure # 1
C
c1
2m
Figure # 2
B
B
b1
X
15
