2.1.1.2
Aluminum
Extruded aluminum components shall be type 6061-T6, 6062-T6, or 6063-T6,
and shall conform to ASTM B 221M ASTM B 221. Minimum tensile strength of
extruded aluminum components shall be 270 Mpa 39,000 psi, and the minimum
yield shall be 250 Mpa 36,500 psi. Cast aluminum alloy shall conform to
ASTM B 179, ASTM B 26/B 26M, and ASTM B 108.
2.1.1.3
Chain
Chain shall be a minimum size 4/0 and shall be corrosion resistant zinc
plated. Polyvinyl chloride coating shall be as specified.
2.1.1.4
Rope Cable
Rope cable shall be composed of strands of steel cable with a polypropylene
or Dacron synthetic covering that is UV stabilized. Cable ends shall be
capped to prevent fraying.
2.1.1.5
Hardware
Hardware shall be corrosion resistant and consist of the following:
aluminum, stainless steel, brass, zinc plated steel, zinc-chromate plated
steel, or galvanized steel, ASTM A 153/A 153M. When secure the hardware
shall require a tool to prevent unauthorized loosening and removal.
2.1.1.6
Rails, Loops, and Hand bars
Rails, loops, and hand bars shall consist of corrosion resistant aluminum,
powder-coated steel or galvanized steel. Polyvinyl chloride coating, if
provided, shall be as specified.
2.1.1.7
Anchors shall be in accordance with manufacturer's recommendations.
2.1.2
Wood
Wood components shall be exterior premium grade and free of knots. Wood
components obtained from managed forests shall be identified. Wood
components shall have factory-drilled holes. Components with extra holes
not filled by hardware or covered by other components will be rejected.
2.1.2.1
Wood Treatment
Wood components that are not naturally rot and insect resistant shall be
treated to resist rot and insect attack by using standard treatment
procedures. Any wood placed up to a maximum 150 mm 6 inches above, or any
portion below the top elevation of the protective surfacing, shall be
treated after fabrication. Creosote, pentachlorophenol, and tributyl tin
oxide are prohibited according to ASTM F 1487.
2.1.2.2
Plywood
Plywood shall be a minimum 19 mm 3/4 inch thick exterior premium grade, and
adhered with a waterproof glue that will not separate under conditions of
prolonged freezing temperatures, extreme heat, or excessive moisture. Face
layers shall be smooth, fine and tightly grained, free of knots, patches,
or surface irregularities. Exposed surface shall consist of a material
SECTION 02882
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