 ARCHITECTURAL
SPECIFICATIONS FOR VIROC CEMENT BONDED PARTICLE BOARD
Revised 10121/02
- GENERAL: The work under this
section is subject to the provisions of
the Contract Documents which in any way affect the
work herein specified.
- SCOPE OF WORK
- Furnish and Install all
interior and exterior wall mounted VIROC cement
bonded particleboard as indicated on the drawings
or as herein specified
- Coordinate this section
with interfacing and adjourning work for proper
sequencing of installation.
- WORK IN OTHER SECTIONS
- Steel Studs
- CRC horizontal bracing
- Wood Studs and horizontal
bracing
- Wall Insulation
- Gypsum wallboard
- Exterior and Interior finishing
and finishes
- MATERIALS
- All Interior and Exterior
wall mounted VIROC panels shall be supplied by
Allied Building Products Corp. and shall be installed
in accordance with the current Viroc printed instructions.
- VIROC Wall Panels
- Panels to be of U.S.
(nominal) (metric mm) 5/16" (8mm), 3/8" (10mm),
1/2" (12mm), 5/8" (16mm), 3/4" (19mm), 7/8"
(22mm), 1" (25mm), 1 1/8" (28mm), 1 1/4" (32mm),
and 1 5/8" (40mm) thickness in 4' x 8' and
4' x 10' sizes as indicated on drawings. (Sizes
less than indicated lengths and widths are
available on special order.)
- Panels are standard
production square edged. Tapered edges, ship
laps, tongue and grooves are available on
special order.
- Panels shall have the
minimum physical properties (in dry conditions):
- 0 Flame Spread and
Smoke Development (per ASTM E- 84)
- 1 hr. - 2 1/2hr.
Fire Resistance (per ASTM E- 119)
- I 1/2hr. Horizontal
Floor Fire Resistance (per ASTM E-I 19)
- Modulus of Elasticity
- 711,000 PSI (per ASTM C- 120)
- Shear Strength -
2,250 PSI (per ASTM D-732)
- Tensile Strength
- 793 PSI (Parallel), 99.8 PSI (Perpendicular)
(per ASTM D-209)
- Compressive Strength
- 6,860 PSI (per ASTM C- 170)
- Coefficient of Linear
Expansion - 1.07 in/in/deg C as per (per
ASTM D-696)
- Water vapor transmission
| g/hr/m2 |
.78 |
| Grains
/hr-ft2 |
1.119 |
| Permeance,
US Perms |
2.698 |
| Permeability |
1.241 |
- Thermal Conductivity
"R" Value 0.36 (per ASTM C-156)
- Impact Resistance
0.46 ft / lbs / inch of Notch (per ASTM
D-256)
- Sound Transmission
STC Rating 31 at 1/2" thick (per ASTM
E-90)
- Panels shall meet all
of the evaluation standards as set forth in
BOCA Research Report 94-61
- The proper panel thickness
for the design load, deflection limit, and
framing spacing shall be selected from the
manufacture's loading tables.
- VIROC panels are water
vapor permeable and will adapt to the ambient
humidity level. For application of surface
treatments which are not vapor permeable,
the reverse side and edges of VIROC panels
must be sealed with non-vapor permeable sealer.
- Panels shall consist
of circa 19% wood particles by weight encapsulated
in cement. Panels are to be free of asbestos,
formaldehyde and hazardous volatiles. Wood
particles are to be mineralized into a state
where the board is resistant to attack from
chemicals, weather, fire, insects and biological
agents.
- Mechanical Attachment:
VIROC can be nailed, screwed, or fastened with
clips. The panels should be pre-drilled whenever
conditions of use require clearance on installation.
In any event, whether the panels are nailed, screwed,
or fastened with clips by the means of electric
or pneumatic equipment, it is important to comply
with manufacturer's instructions.
- Fasteners:
- Countersunk screws designed
for particle boards or gypsum boards, in stainless
steel or galvanized, preferably self tapping
screws with central tip adapted to the type
of substrate.
- Diameter: 2.2 to
3.1mm
- Length: 3 to 3.5
times the panel thickness
- Surface Treatments
- Synthetic stucco systems
- VIROC is compatible
with many acrylic systems. Consult particular
manufacturers for approved application
details.
- Paints:
- VIROC has a smooth
surface ready for paint decoration.
- Insure that the
surface is dust free before painting
- VIROC has a pH ranging
from I I - 13. Use alkali resistant primers
when applicable.
- SAMPLES AND SUBMITTALS
- Submit two 6" x 6" pieces
of VIROC panels in thickness selected.
- Submit two copies of specifications,
installation instructions and general
recornmendations of the manufacturer.
- TESTS: Meet minimum mechanical
and physical properties, as herein
specified, tested by independent laboratories with
corroborating support documentation.
- FIRE RESISTANCE: VIROC is rated
for 0 flame spread and 0 smoke
developments under ASTM E-84. It is also non-combustible
in accordance with ASTM E-136. Consult Manufacturer
for specific fire rated assemblies as required.
- MANUFACTURING TOLERANCES
- Length / Width + - 5mm
- Squareness + - 2.5mm on
a panel width
- Straightness of Edges 6.5mm
/ meter
- Thickness + - 0.7mm up to
10mm thickness
+ - 1.0mm for thickness of 12 to 16mm
+ - 1.5mm for thickness of 19mm or greater
- DELIVERY AND STORAGE
- VIROC panels are normally
delivered to site in wrapped units with edge protection
to facilitate forklift handling. When transporting
loose panels by truck, they must be laid flat
and fully protected against edge damage and covered
with a waterproof protection. When hand carrying
single panels, they must be carried on the edge.
- Deliver, store, and handle
materials to prevent breakage, warpage, or damage
by water.
- Acclimatize materials by
storing on site not less than two days prior to
installation.
- Material should be stored
on leveled dunnage not exceeding 32" on centers,
elevated above the ground, and covered top and
sides to prevent water damage.
- Panels should be stored
flat and not on edges.
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