Aligning The Casing
Align the elevator casing first at an intermediate support, if
present, and proceed to the head unit, referring to fig.10 and fig.11
Next, suspend plumb lines from the head unit as shown in fig.10 to
ensure vertical alignment of elevator casings. Measure accuracy at
three points,(a), (b), (c) shown in fig.11 and adjust alignment until
allowable tolerance.