6) Mark point a1 on wall A, in the middle of the forward vertical
beam.
7) Mark point b1 on wall B, in the middle of the side vertical
beam.
8) Mark the plumb dot position as x on the table. (see figure # 10).
תמונ
9) Rotate the laser clockwise so that the forward laser beam
passes through mark b1 on wall B. Verify that the
plumb dot is on mark x.
22
A
a1 X
Figure # 10
Figure # 10
B
X
X
b1