using templates supplied by the structure manufacturer. When concrete has
cured, structure baseplates shall be leveled and grouted in place. Columns
shall then be set on baseplates, leveled on foundations, and secured with
holding nuts. Concrete work and grouting shall comply with the
requirements of Section 03300A CAST-IN-PLACE STRUCTURAL CONCRETE.
3.1.3.2
Concrete Pads
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NOTE: Do not allow rectangular holes in the
concrete pad if rodent intrusion is a problem.
Specify concrete pad reinforcing requirements.
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Concrete pads for pad-mounted electrical equipment shall be constructed as
indicated. Tops of concrete pads shall be level and shall project four
inches above finished [floor] [paving or grade] and sloped to drain.
Conduits for primary, secondary, and grounding conductors shall be set in
place prior to placing of concrete pads. Concrete work shall comply with
the requirements of Section 03300A CAST-IN-PLACE STRUCTURAL CONCRETE. If
the equipment primary compartment is not of sufficient height to allow the
installation of the medium-voltage terminators, load break elbows or
switches, the Contractor shall provide adequate space by providing a
rectangular hole in the concrete pad below the primary compartment and/or a
factory prefabricated steel adjustment ring around the entire perimeter of
the base of the equipment. Steel rings shall be factory manufactured to
fit the base of the equipment of which they support and shall be factory
painted to match the equipment enclosure. Steel base rings shall be
constructed using the same or greater thickness of steel as the equipment
being supported. Concrete pads to support pad mounted electrical equipment
shall be reinforced [with [_____] mm inch steel reinforcing rods at [_____]
mm inches, on center, each way] [_____]. Where grounding electrode
conductors are installed through concrete pads, PVC conduit sleeves shall
be installed through the concrete to provide physical protection. When the
installation is complete, the Contractor shall seal all conduit and other
entries into the equipment housing with an approved sealing compound.
Seals shall be of sufficient strength and durability to protect all
energized live parts of the equipment from rodents, insects, and foreign
matter.
3.1.4
Fencing
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NOTE: Designer will provide detail for fence
grounding.
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The station shall be enclosed by chain-link fence as shown. Fencing is
specified in Section 02821A FENCING and shall be grounded in accordance
with paragraph GROUNDING.
3.1.5
Surface Treatment
Horizontal spaces between concrete foundations or pads and fences shall be
excavated to minimum depth of [150] [_____] mm [six] [_____] inches below
finished gradelines, shall be graded to level surfaces, and filled with
well-compacted clean coarse gravel or crushed stone of 13 to 38 mm 1/2 to
1-1/2 inches in size up to finished gradelines.
SECTION 16311A
Page 69
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