]][2.1.6
Impact Resistant Gypsum Board
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NOTE: Impact resistant gypsum board should be used
when abuse or vandalism of walls is anticipated and
gypsum board is the only wall material alternative
feasible. Consult manufacture for use restrictions
of impact resistant gypsum board on exterior walls.
This product requires a minimum of 20 gauge metal
framing as support, coordinate with section 09100,
"Metal Support Assemblies".
Some products rely on lexan backing for
penetration resistance. The impervious layer will
act as a vapor barrier which may not be desirable in
certain wall systems and climates.
None of the paper faced gypsum products have high
resistance to abrasion. Designer should consider
high strength veneer plaster on wall systems using
impact resistant gypsum wallboard, coordinate with
section 09215, "Veneer Plaster".
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1200 mm 48 inch wide, 15.9 mm 5/8 inch thick, tapered edges.
Reinforced gypsum panel with imbedded fiber mesh or lexan backing testing
in accordance with the following tests. Provide fasteners that meet
manufacturer requirements and specifications stated within this section.
Impact resistant gypsum board, when tested in accordance with ASTM E 84,
shall have [a flame spread rating of 25 or less and a smoke developed
rating of 50 or less for [_____]] [and] [a flame spread rating of 75 or
less and a smoke developed rating of 100 or less for [_____]].
2.1.6.1
Structural Failure Test
ASTM E 695 or ASTM D 2394 for structural failure (drop penetration). ASTM E
695using a 27.2 kg 60 lb sand filled leather bag, resisting no less than
407 N-m 300 ft. lb. cumulative impact energy before failure or ASTM D 2394
using 139.7 mm 5.5 inches hemispherical projectile resisting no less than
357 N-m 264 ft. lb. before failure. Test specimen stud spacing shall be
406 mm 16 inch or greater on center.
2.1.6.2
Indentation Test
ASTM D 5420 or ASTM D 1037 for indentation resistance. ASTM D 5420 using a .907
kg 32 oz weight with a 16 mm 5/8 inch hemispherical impacting head dropped
once 915 mm 3 feet creating not more than 3.5 mm 0.137 inch indentation or
ASTM D 1037 using no less than 213 kg 470 lb weight applied to the 11.13 mm
0.438 inch diameter ball to create not more than a 0.5 mm 0.0197 inch
indentation depth.
]2.1.7
Predecorated Gypsum Board
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NOTE: Predecorated gypsum board is available only in
1200 mm 48 inch wide panels. Interior finish
materials for exits, hospitals, individual rooms
with capacity for 5 or more persons must have a
flame spread rating of 25 or less and smoked
developed rating of 50 or less. Interior finish
SECTION 09250
Page 11
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