22
5) Rotate the laser 90° counterclockwise so that the cross
beams pass through
c1
on the table, and the forward
laser beam passes through the marks
a1
and
b1
on the
walls
A
and
B
respectively.
6) Mark as
c3
the center of the side vertical beam on wall
C
,
at the same height as point
c2
. (see figure # 8 ).
c2
X
c1
X
X
a1
2.5m
2.5m
A
b1
X
B
C
Figure # 7
5m
# הנומת
7
