CENTERED
POINT
CONTACT
OFFSET
CONTINUOUS
CONTACT
(Fig 2.4 Examples of Different Positions of Penetrating Items)
As penetrating items are often located
off-center within an opening, it is import-
ant that the minimum annular space for
the installed penetration is not less than
the minimum annular space required by
the tested system, and that the maximum
annular space for the installed penetration
is not larger than the maximum annular
space allowed by the tested system. Fig-
ure 2.6 illustrates how the minimum and
maximum annular spaces are determined
in an installed penetration. The size of the
annular space is not the only issue that
the listing will address. Each system will
specify whether the penetrant needs to be
centered, maybe offset, may have a point
contact or may have continuous contact.
MINIMUM
ANNULAR
SPACE
MAXIMUM
(Fig 2.5 Measuring Minimum and
Maximum Annular Space Around
Penetrating Item)