Product Sheet
SILCA GRATE
1.0 EVALUATION SCOPE
Compliance with the following codes:
*2015 and 2012 International Building Code (IBC)
*2015 and 2012 Itnernational Residential Code
(IRC)
Properties evaluated:
*Structural
*Durability
*Surface-burning characteristics
2.0 USES
The Silca Grate is used to span between floor
framing members to support flooring materials for
exterior decks, balconies, porches and stair treads
of Type V-B (IBC) construction and structures
constructed in accordance with the IRC.
3.0 DESCRIPTION
3.1 General:
Silca Grate is an injection molded plastic panel
with a honeycomb structure, nominal dimensions
of 16 x 18 inches, equaling 2 square feet for the
deck panel. Stair treads are cut in the field from the
panel and have nominal dimensions of 16 inches
by 11 inches (406 mm x 279 mm). The panels have
holes for screws that are used to attach the panels
to deck joists and stair stringers.
3.2 Durability:
The evaluation of Silca Grate durability when
subjected to temperature effects, ultraviolet (UV)
resistance and freeze-thaw resistance is addressed
in this report.
3.3 Surface-burning characteristics:
When tested in accordance with ASTM E84, Silca
Grate has a flame-spread indnex of no greater than
200.
4.0 DESIGN AND INSTALLATION:
4.1 General:
Installation of the Silca Grate panel and stair tread
must comply with this report, the manufacturer’s
published installation instructions and the
applicable code. The manufacturer’s published
installation instructions must be available on the
jobsite at all times during installation.
4.2 Design:
The Silca Grate panels, when used to span
between floor framing, have a maximum span
capacity of 16 inches.
The Silca Grate when used as stair treads, are
satisfactory to resist the code-prescribed concen-
trated load of 300 lbf (1.34 kN) when installed at a
maximum center-to-center spacing of the
supporting construction.
4.3 Installation:
The Silca Grate panels, when used to span
between floor framing or stair treads, are installed
on 2 x wood members spaced according to Tables
1 or 2 using #9, corrosion resistant wood screws, 3
inches long (76 mm), located in each of the screw
holes of the panel.
Floor coverings are not supplied by Silca System.
Floor coverings may consist of natural stone or
manufactured pavers and are installed over the
Silce Grate panels.
5.0 CONDITIONS OF USE
The Silca Grate described in this report complies
with, or is a suitable alternative to what is specified
in, those codes listed in Section 1.0 of this report,
subject to the following conditions:
5.1 Intallation must comply with this report, the
manufacturer’s published instructions and the
applicable code. When there is a a conflict
between this report and the manufacturer’s
published installation instructions, this report
governs.
5.2 This product is for exterior deck, balconies,
porches and stair treads of Type V-B (IBC)
construction and structures constructed in
accordance with the IRC.
5.3 Only those fasteners described in this report
have been evaluated for the installation of the Silca
Grate panels. The compatability of the fasteners
with the supporting construction, including
checmically treated wood, is outside the scope of
this report.