shall have grounding provisions. The type of pole shaft material provided
shall not be mixed on any project. Grounding connection shall be provided
near the bottom of each metal pole and at each concrete pole anchor base.
Scratched, stained, chipped, or dented poles shall not be installed.
2.11.1
Aluminum Poles
Aluminum poles and brackets for [walkway] [_____] lighting shall have a
[uniform satin] [dark anodic bronze] [_____] finish to match fixtures and
shall not be painted. Manufacturer's standard provision shall be made for
protecting the finish during shipment and installation. Minimum protection
shall consist of spirally wrapping each pole shaft with protective paper
secured with tape, and shipping small parts in boxes.
a.
Shafts shall be round and of seamless construction. The wall
thickness shall be at least 4.8 mm 0.188 inch. Exterior surfaces
shall be free of protuberances, dents, cracks, and discoloration.
Material for shafts shall be 6063 aluminum alloy; after
fabrication, the alloy shall have a T6 temper. Tops of shafts
shall be fitted with a round or tapered cover. Bases shall be
anchor bolt mounted, made of cast aluminum alloy 356-T6, and shall
be machined to receive the lower end of shafts. Joints between
shafts and bases shall be welded. Bases shall be provided with
four holes, spaced 90 degrees apart, for anchorage.
b.
Hardware, except anchor bolts, shall be either 2024-T4 anodized
aluminum alloy or stainless steel.
2.11.2
Steel Poles
Steel poles shall be hot-dip galvanized in accordance with ASTM A 123/A 123M
and shall not be painted. Poles shall have tapered tubular members,
either round in cross-section or polygonal. Pole shafts shall be one
piece. Poles shall be welded construction with no bolts, rivets, or other
means of fastening except as specifically approved. Pole markings shall be
approximately 900 to 1270 mm 3 to 4 feet above grade and shall include
manufacturer, year of manufacture, top and bottom diameters, length, and a
loading tree. Attachment requirements shall be provided as indicated,
including grounding provisions. Climbing facilities are not required.
Bases shall be of the anchor bolt-mounted type.
2.11.3
Concrete Poles
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NOTE: In areas where freezing temperatures occur,
the minimum compressive strength given for concrete
in spun poles should be increased in line with the
usual concrete design for such temperatures.
**************************************************************************
Concrete poles shall be designed to withstand the loads specified in IEEE C2
multiplied by the appropriate overload capacity factors. Poles shall be
reinforced or prestressed, either cast or spun. Spun poles shall be
manufactured by a centrifugal spinning process with concrete pumped into a
polished round tapered metal mold. Concrete for spun poles shall have a
compressive strength of at least 34.5 MPa 5,000 psi at 28 days; steel wire
shall have an ultimate tensile strength of at least 827 MPa 120,000 psi;
and reinforcing bars shall have an ultimate tensile strength of at least
276 MPa 40,000 psi. After the high speed spinning action is completed, a
SECTION 16528A
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