Table of Contents
Advertisement
5. Turn the laser 180° towards wall B and mark the centre of the cross beams as b1 on the
wall.
a1
6. Move the laser level towards wall B and position it approximately 0.5 m from wall B.
7. On wall B, mark the centre of the cross beams as b2.
A
a1
8. Turn the laser 180° towards wall A, and mark on the wall the centre of the cross beams
as a2.
A
a2
2 2
2 2
a1
a1
9. Measure the distances:
Δa= |a2-a1|
Δb= |b1-b2|
10. The difference |Δa – Δb| should be no more than 2 mm.
For sign-off review, sent 4 Aug 2023.
180°
19
b1
B
b2
b1
B
180°
b2
b1
19
9
Advertisement
Table of Contents
