details shown. Conduit elbows shall be provided for cable entrances into
pole interiors.
3.2.2.1
Cast-In-Place Foundations
Concrete foundations, sized as indicated, shall have anchor bolts
accurately set in foundations using templates supplied by the pole
manufacturer. Concrete work and grouting is specified in Section 03300A
CAST-IN-PLACE STRUCTURAL CONCRETE. After the concrete has cured, pole
anchor bases shall be set on foundations and leveled by shimming between
anchor bases and foundations or by setting anchor bases on leveling nuts
and grouting. Poles shall be set plumb. Anchor bolts shall be the
manufacturer's standard, and not less than necessary to meet the pole wind
loading specified herein and other design requirements.
3.2.2.2
Power-Installed Screw Foundations
Power-installed screw foundations may be used if they have the required
strength, mounting-bolt, and top plate dimensions. Screw foundations shall
be of at least 6.4 mm 1/4 inch thick structural steel conforming to ASTM A
36/A 36M and hot-dip galvanized in accordance with ASTM A 123/A 123M.
Conduit slots in screw foundation shafts and top plates shall be marked to
indicate orientation. Design calculations indicating adequate strength
shall be approved before installation of screw foundation is permitted.
Calculations shall be submitted in accordance with the detailed drawings.
3.3
CROSSARM MOUNTING
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NOTE: Normally flat braces will be specified for
2.4 m (8 foot) crossarms and angle braces for 3.1 m
(10 foot) crossarms to agree with REA construction.
An angle brace is also required on 2.4 m (8 foot)
arms where conductors have a breaking strength of
more than 20.0 kN (4500 pounds). Extreme loading
conditions may also warrant the extra cost of the
stronger angle brace under other circumstances.
Metal crossarm braces will reduce the effective BIL
rating of the pole. In high lightning areas specify
fiberglass braces.
Consult REA Bulletin 61-10, "Protection of Bald and
Golden Eagles from Powerlines." The requirement for
wooden crossarm braces should be verified for each
state and land area in accordance with the Bald
Eagle Protection Act of 1940, (16 U.S.C. 703 et
seq.) as amended; Endangered Species Act of 1973 (87
Stat. 1064); and Migratory Bird Treaty of 1918 (16
U.S.C 703 et. seq.) as amended. Potential
requirement sources are the Bureau of Land
Management, U.S. Department of the Interior, and
Federal, State, and Local Land Management or
Wildlife Conservation Agencies.
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Crossarms shall be bolted to poles with 15.9 mm 5/8 inch through-bolts with
square washers at each end. Bolts shall extend not less than 3 mm 1/8 inch
nor more than 50 mm 2 inches beyond nuts. On single crossarm construction,
SECTION 16370A
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