crossarms] [38 inch span for 8 foot crossarms] [and] [60 inch span for 10
foot crossarms].
2.3.3
Armless Construction
Pole mounting brackets for line-post or pin insulators and eye bolts for
suspension insulators shall be as shown. Brackets shall be attached to
poles with a minimum of two bolts. Brackets may be either provided
integrally as part of an insulator or attached to an insulator with a
suitable stud. Bracket mounting surface shall be suitable for the shape of
the pole. Brackets for wood poles shall have wood gripping members.
Horizontal offset brackets shall have a 5-degree uplift angle. Pole top
brackets shall conform to IEEE C135.22, except for modifications necessary
to provide support for a line-post insulator. Brackets shall provide a
strength exceeding that of the required insulator strength, but in no case
less than a 12.5 kN 2800 pound cantilever strength.
2.4
HARDWARE
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NOTE: In hot humid marine atmospheres, galvanized
steel pole-line hardware may not be acceptable and
only hot-dip galvanized malleable or ductile iron
should be permitted. Local usage should be checked.
NAVFACENGCOM requires hot-dip galvanized hardware
only.
**************************************************************************
Hardware shall be hot-dip galvanized in accordance with ASTM A 153/A 153M.
**************************************************************************
NOTE: Do not use this paragraph for Navy projects.
The pole line construction criteria for the Navy,
including the listing of materials, is covered in
the pole plates.
**************************************************************************
[Zinc-coated hardware shall comply with IEEE C135.1, IEEE C135.2, NEMA
C135.4, ANSI C135.14 IEEE C135.22. Steel hardware shall comply with ASTM A
575 and ASTM A 576. Pole-line hardware shall be hot-dip galvanized
[steel.] [steel, except anchor rods of the copper-molten welded-to-steel
type with nonferrous corrosion-resistant fittings shall be used].
Washers
shall be installed under boltheads and nuts on wood surfaces and elsewhere
as required. Washers used on through-bolts and double-arming bolts shall
be approximately 57.2 mm square 2-1/4 inches square and 4.8 mm 3/16 inch
thick. The diameter of holes in washers shall be the correct standard size
for the bolt on which a washer is used. Washers for use under heads of
carriage-bolts shall be of the proper size to fit over square shanks of
bolts. Eye bolts, bolt eyes, eyenuts, strain-load plates, lag screws, guy
clamps, fasteners, hooks, shims, and clevises shall be used wherever
required to support and to protect poles, brackets, crossarms, guy wires,
and insulators.]
2.5
INSULATORS
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NOTE: Stipulate insulator class required for each
application. The following table suggests insulator
types from specific ANSI Standards for application
SECTION 16301N
Page 16
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