other patterns; otherwise, specify all patterns as
Contractor's options. Ascertain that a specific
pattern required is commercially available in the
type unit specified since some type units are
available only in certain patterns. Specialized
patterns must be described in detail within the
bracketed blank space.
Acoustical units will be limited generally to Types
III and IV. Metal-faced units (Types V, VI, VII,
and VIII), and fabric faced overlay (Type XI),
because of the higher cost factor, will not normally
be considered.
Composition units with paint finish are lowest in
cost and available in widest variety of patterns.
Types III and IV are available in three forms: Form
1 (nodulated, cast, or molded) is appropriate for
high quality areas such as conference rooms, and
officers dining facilities. It is more costly than
forms 2 (water-felted) and 3 (dry-felted).
Type I - Cellulose composition with standard
washable painted finish
Type II - Cellulose composition with plastic
membrane-faced overlay
Type III - Mineral composition with standard
washable painted finish
Type IV - Mineral composition with plastic
membrane-faced overlay
Type V - Steel facings with mineral composition
absorbent backing
Type VI - Stainless steel with mineral composition
absorbent backing
Type VII - Aluminum with mineral composition
absorbent backing
Type VIII - Cellulose composition with scrubbable
pigmented or clear finish
Type IX - Mineral composition with scrubbable
pigmented or clear finish
Type X - Mineral composition with plastic/aluminum
membrane
Type III or IV units should be used except when any
of the following conditions exist, one of the types
listed below should be specified:
High Humidity - Aluminum or stainless steel pans
with mineral wool pads. Humidity resistant mineral
composition units.
SECTION 09510
Page 11
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