Rev. April 2003
GC Products, Inc. GFRG* -
Glass Fiber Reinforced
Gypsum
(For Interior Applications)
1.0 General
1.1
Scope:
Furnish all materials,
labor, equipment and related
services necessary to supply
and erect GCP GFRG* units as
indicated in the contract
documents and in compliance
with local codes.
1.2
Related Sections:
1.
Section 03490 – Glass Fiber
Reinforced Concrete
2.
Section 04720 – Cast Stone
3.
Section 05500 – Metal
Fabrications
4.
Section 06100 – Rough
Carpentry
5.
Section 06610 – Glass Fiber
Reinforced Plastic
Fabrications
6.
Section 09900 – Paints and
Coatings
1.3
Responsibility:
The gypsum drywall
contractor shall install and
tape the work under this
section and will be
responsible for coordinating
the installation with gypsum
drywall work and other
trades.
1.4
Manufacturers:
GC Products, Inc.
1045 West National Dr.,
Suite 7
Sacramento, CA 95834-1930
P.
916.263.9892 F.
916.263.989
www.gypcemproducts.com
1.5
Samples and Submittals:
1.
Submit under provisions of
Section 01300.
2.
Product Data: Manufacturer’s
data sheets on each product
to be used, including
dimensions, finishes,
storage and handling
requirements and
recommendations, and
installation
recommendations.
3.
Shop Drawings: Provide
drawings showing dimensions,
joint details.
4.
Samples: Two samples,
minimum size 6 inches (150
mm) square, representing
actual product, color and
patterns.
1.6
Substitutions:
1.
Not permitted
2. Request for
substitutions will be
considered in accordance
with provisions of Section
01600
2.0
Products
2.1 Materials:
A. GCP GFRG* units
shall be prefabricated with
high-density gypsum,
reinforced with continuous
random filament glass fiber
mat and structural
reinforcing as required.
1.
Glass Content: 5 to 6
percent by weight
2.
Density: 103 to 112 pcf
3.
Shell Thickness: 1/8 to 3/16
inch (3 to 5 mm) nominal
4.
Flammability: Flame Spread
Index of 0
Smoke Development Index of 0
5.
Flexural Strength: 300-4000
PSI
6.
Compressive Strength: 7600
PSI
7.
Hardness (Barcol) 50
8.
Impact Resistance 8.0
ft.-lb./in.2
2.2
Tolerances (Fabrication):
Dimensional – all
directions
+/-
1/8”
Thickness – skin
+ 1/16”/-0
Thickness – total unit
+/- 1/8”
Warpage or bowing
+/- 1/16” per
ft.
Draft Angle: 3 degrees,
minimum, on returns,
setbacks, revels, and
grooves.
3.0
Execution
3.1
Examination:
1. Do not begin
installation until
substrates have been
properly constructed; verify
that substrates are plumb
and true.
2.
If substrate preparation is
responsibility of another
installer, notify architect
of unsatisfactory conditions
before proceeding.
3.
Check field dimensions
before beginning
installation.
3.2
Preparation:
1.
Clean surface thoroughly
prior to installation.
2. Prepare surfaces
using methods recommended by
the manufacturer for
achieving the best result
for the substrate under
project conditions.
3. Install
supplementary and permanent
supports as required for
proper installation.
3.3
Installation:
1. Install in
accordance with applicable
code and manufacturer’s
recommendations, plumb and
true to line, shim where
necessary.
2.
Coordinate work with related
gypsum wallboard work.
3.
Join pieces with cemented
butt joints except at
control and expansion
joints.
4.
Provide expansion joints
where moving joints in
substrate occur.
5.
Finish joints as specified
for adjacent gypsum board
work in Section 09260.
6.
Finish joints and surfaces
as required for Level 5 in
ASTM C 840.
3.4 Protection:
1.
Protect installed products
until completion of project.
2. Touch-up, repair or
replace damaged products before
substantial completion.
