2012

For clearance clashes, the severity depends on how close one item invades the distance
required around the second. For example, an item coming within 3mm is more severe than
an item coming within 5mm of the other.
For duplicate clashes, the severity depends on how close one item is to the other. When the
distance between them is zero, it is more likely that this is duplicate geometry, where as
items that are further apart are more likely to be different objects and therefore have a lesser
severity.
tolerance Tolerance controls the severity of the clashes reported and the ability to filter
out negligible clashes, which can be assumed to be worked around on site. Tolerance is
used for
hard clash (page 838), clearance clash (page 838) and duplicate clash (page 838) types
of clash test. Any clash found that is within this tolerance will be reported, whereas clashes
outside of this tolerance will be ignored. So for Hard clashes, a clash with a severity (page
838) of between zero and the tolerance value will be ignored, whereas for Clearance clashes,
a clash with a severity of more than the tolerance value will be ignored as it is further away
than the distance required. Similarly, a Duplicate clash with a severity of more than the
tolerance value will be ignored as it is likely to be a separate, yet identical piece of geometry.
Glossary | 839