2.1.2
Units for Concealed-Grid System [A] [_____]
Type: [III (non-asbestos mineral fiber with painted finish)] [IV
(non-asbestos mineral fiber with membrane-faced overlay)] [IX (mineral
fiber with scrubbable finish)].
Minimum NRC: [0.50] [_____] when tested on mounting Type B or Type E-400
of ASTM E 795.
Pattern:
[A] [B] [C] [D] [E] [F] [G] [I] [J] [K] [_____].
Nominal size:
[300 by 300] [_____] mm. [12 by 12] [_____] inches.
Edge detail:
[beveled] [square].
Joint detail:
[kerfed and rabbeted] [tongue and grooved].
Finish:
Factory-applied [standard finish] [color finish].
Minimum LR coefficient:
[LR-1, 0.75 or greater] [_____].
Minimum CAC:
[40] [_____].
Flame Spread:
Class A, 25 or less.
2.1.3
Metal Pans [A] [_____]
Type: [V, steel] [VI, ASTM A 167 stainless steel] [VII, aluminum]
perforated pans with acoustical, non-asbestos, insulation backing.
Minimum NRC: [0.75] [_____] in open office areas; [0.60] [_____] in
conference rooms, executive offices, teleconferencing rooms, and other
rooms as designated; [0.50] [_____] in all other rooms and areas when
tested on mounting Type E-400 of ASTM E 795.
Pattern:
[A] [C] [I] [_____].
Nominal size:
[600 by 600] [_____] mm. [24 by 24] [_____] inches.
Edge detail:
Manufacturer's standard.
Joint detail:
[Beveled] [_____].
Finish:
Factory-applied standard finish.
Pads: [Completely enclosed, of material and thickness required for
acoustical and fire test ratings] [_____].
Minimum LR coefficient:
[LR-1, 0.75 or greater] [_____].
Flame Spread:
Class A, 25 or less.
2.1.4
Impact/Abrasion Resistant Units
a.
Type: Non-asbestos mineral composition with a hardened mineral
surface and factory applied white paint finish. Surface shall be
resistant to impact and abrasion.
b.
Class:
A, flame spread 25 or less.
SECTION 09510
Page 14
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