Typical
Details of Concrete Poles
Pole
Top Tenon: (Detail 'h')
Tenons
are mounted on specially designed inserts to provide the structural capacity for
the specific job. Typical tenon size is 2 7/8" OD x 3", other sizes
available upon request. For luminaire's or support arms mounted directly on top
of the pole, the wiring exits the top of the pole and through the tenon raceway.
Inserts:
(Detail 'd2')
Inserts
can be cast directly into the concrete pole when required for threading bolts,
banner arms, or other attachments. All inserts are hot dipped galvanized for maximum
corrosion protection. Inserts are generally available with 1/4", 3/8",
1/2", 5/8", 3/4", or 1" NC threads.
Above
Grade Aperture: (Detail 'e')
Through
the centrifugal casting process, our spun concrete poles have a hollow raceway
ideal for wire installation. Access apertures are formed directly in the concrete.
A variety of sizes are available (detail'e'). One end of the hole is sloped to
provide clear access and the other is rounded to protect the insulation of the
wire during installation.
If side mount
arm is required a 1 1/2" x 3" wiring aperture is cast into the pole.
The aperture is located 90° counter clockwise from the hand hole and typically
12-18 inches from the top of the pole. One aperture is provided in a standard
pole. Two 3/4" formed through holes (d1) are provided to mount the fixture
arm. (5/8", 11/16", and 1" through holes are also available) A
second aperture can be installed for a twin arm arrangement if specifically stated
on order. On top a plastic cap is a supplied standard. A Decorative Fin Cap may
be substituted if desired.
Manufacturers
ID Tag: (Detail 'g')
ID Tags
can be installed at various locations. Information on the ID Tag includes Manufacturers
Name, height, class, weight, date of manufacture and pole number.
Hand
Hole Frame and Cover: (Detail 'c')
Access
to wiring inside the pole is provided through a hand hole on all concrete poles.
The hand hole is typically located so that a worker facing the hand hole is also
facing oncoming traffic. It is normally located 12-18 inches above finished grade.
Alternate hand hole locations can be accommodated if specifically stated on order.
Poles are shipped with the hand hole cover attached with tamper proof screws for
public safety.
Grounding:
(Detail 'c')
Sky Cast
concrete poles are supplied with a 1/4" diameter continuous steel grounding
rod running the length of the pole. The hand hole frames are electrically connected
to this rod. A copper ground wire at the hand hole connects the pole and its components
to the installation grounding system. For this option, use the letter "G"
in the product code. Arrangements can be made for all other equipment mounted
on the pole (eg. transformers) to be connected to this grounding rod with the
use of cast in grounding lugs. Please supply details of these requirements at
the time of order.
Below
Grade Apertures: (Detail 'f')
Below grade
wiring apertures are typically placed 15" - 21" below grade to allow
access for underground cables
