2.2.7
Hardware
Hardware, anchors or fasteners shall be corrosion resistant stainless steel
or galvanized steel to anchor the surfacing system securely, in accordance
with manufacturer's instructions. Hardware shall provide or be recessed to
provide a flat surface and shall be covered by the required depth of
protective surfacing.
2.2.8
Binder
Binder for synthetic surfacing shall be nontoxic, weather-resistant,
ultraviolet stable, non-hardening, and retaining impact-attenuating
performance. It shall be 100 percent solids containing polyurethane,
methylene diphenel isocyanate (MDI), or as recommended by the manufacturer.
A maximum 2 percent of toluene diphenel isocyanate (TDI) shall be used.
Weight of polyurethane shall be between a minimum 1.02 kg/L 8.5 lbs/gal and
a maximum 1.14 kg/L 9.5 lbs/gal. Coloring pigments shall be inorganic
oxides.
2.2.9
Adhesive
Adhesive shall be a two component polyurethane providing extremely high
impact resistant bond and shall be installed as recommended by the
manufacturer. The adhesive shall be non-toxic, resistant to ultraviolet
light, and safe for children.
2.2.10
Containment Curbs
Containment curbs include the following: treated wood, concrete, recycled
plastic, or recycled plastic molded as lumber. Containment curbs shall
provide a smooth and hazard-free transition from the protective surfacing
to the adjacent surface. Curbs shall be free of sharp vertical edges,
protruding elements and trip hazards. Curbs shall be as recommended by the
manufacturer. All edges should be provided with a minimum 13 mm 1/2 inch
radius.
2.2.11
Transition Edge
The transition edge shall be designed to maintain the protective surfacing
performance, support the surfacing between changes of material, and shall
be concrete in accordance with paragraph CONCRETE CURB. The face of the
edge to the subgrade shall be covered with the impact attenuating surface
and meet the requirements of paragraph CHILD SAFETY.
2.2.12
Combination System
Combination systems shall consist of combined protective surfacing
materials specified. Each component is a part of a manufactured surfacing
system. Wear surface shall be of the materials specified.
2.3
LOOSE-FILL SURFACING
Loose-fill surfacing installed in the use zone shall consist of sand,
gravel or wood by-products.
2.3.1
Sand
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SECTION 02791
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