1.2.2.2
Radiant Heat
The system shall be tested in accordance with NFPA 268 on both the minimum
and maximum thickness of insulation intended for use with no ignition
during the 20-minute period.
1.2.2.3
Impact Resistance
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NOTE: Select impact resistance for Class PB EIFS
based on exposure of wall to potential impact
hazard. Higher impact resistance may be limited to
lower portion (e.g. on first floor only) of wall:
Standard impact resistance:
3 to 6 J;
Medium impact resistance:
6 to 10 J;
High impact resistance:
10 to 17 J; and
Ultra high impact resistance:
Over 17 J.
Standard impact resistance:
25 to 49 inch-lbs;
Medium impact resistance:
50 to 89 inch-lbs;
High impact resistance:
90 to 150 inch-lbs;
Ultra high impact resistance:
Over 150 inch-lbs.
Select lowest impact resistance for wall areas not
accessible to public, (e.g. tower structures, air
shafts). Select medium impact resistance for areas
with limited access to public. Select high impact
resistance for areas with general access to public,
(e.g. first floor walls). Select ultra high impact
resistance in locations with constant access.
The thickness and hardness of Class PM EIFS lamina
make these systems inherently more resistant than
Class PB EIFS to impact failures (defined as
penetration of the lamina) from a small or pointed
object, as simulated by the probe-type indenture
used in the EIMA test method 101.86. Class PM EIFS
are more prone to impact failures (cracking and/or
crushing of lamina) from heavy, blunt objects. ASTM
E 695 is a test method designed to test the whole
wall assembly (including the substrate structural
supports) and not specifically the impact resistance
of Class PM EIFS. However, until a test method to
measure the impact resistance for Class PM EIFS is
developed, if ever, ASTM E 695 provides some means
of qualifying minimum performance for impact
resistance of Class PM EIFS.
For Class PB EIFS, use paragraph a. Class PB Systems
and delete paragraph b. Impact Mass. For Class PM
EIFS, use paragraph b. Impact Mass and delete
paragraph a. Class PB Systems. If selection of
class is Contractor's option, retain both paragraphs
and edit accordingly.
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SECTION 07240
Page 11
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