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– The difference d between point III and the center of the laser line at
the upper edge of the door opening results in the actual deviation of
the measuring tool from the vertical plane.
– Measure the height of the door opening.
The maximum permitted deviation dmax is calculated as follows:
dmax = double height of the door opening x 0.0118 in (0.3 mm/m)
Example: With a door opening height of 7 ft (2 m), the maximum per-
mitted deviation is
dmax = 2 x 7 ft x 0.0118 in = 0.0472 in (2 x 2 m x 0.3 mm/m = 1.2 mm).
Thus, the marks must not be more than 0.0472 in (1.2 mm) apart.
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6/8/18 7:14 AM
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