greasy vapors are a problem. Be alert to this fact,
however, gypsum board made in other countries may
contain asbestos which, of course, is unacceptable.
Drawings should indicate the following:
a. Location of acoustical systems. Arrangement of
acoustical units, panels, light fixtures, and
diffusers, other penetrations and exposed suspension
grids.
b. Location of systems required to have ceiling
attenuation class (CAC).
c. Location and details of system required to have
a fire resistive rating.
d. Location and details and material of fire stops
above suspended ceilings.
e. Location and details of access panels and
maximum spacing of suspension members for concealed
grid suspension systems.
f. Location of each different color and pattern
when more than one type acoustical unit is specified
for a project. Details of special or patterned
panels if necessary to describe adequately. If more
than one system is used, key to locations by using
symbols.
g. Where acoustical ceilings are provided in
conjunction with thermal insulation beneath vented
attic spaces, careful attention should be given to
furnishing the appropriate type ceiling tile,
adequate details on the contract drawings, and to
including appropriate sections in the
specifications. Details on the drawings will cover
such features as support of insulation at
flush-mounted light fixtures, conduit, acoustical
units, suspension system components, heating and
air-conditioning units, and other utilities.
Installation of insulation over the suspension
systems, light fixtures, and other ceiling
penetrations will be coordinated with Sections 06100
ROUGH CARPENTRY and 07214N BOARD AND BLOCK
INSULATION, and manufacturer's literature.
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1.1
REFERENCES
**************************************************************************
NOTE: Issue (date) of references included in
project specifications need not be more current than
provided by the latest guide specification. Use of
SpecsIntact automated reference checking is
recommended for projects based on older guide
specifications.
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SECTION 09510
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