### **ITEM L-119 AIRPORT OBSTRUCTION LIGHTS** {#item-l-119-airport-obstruction-lights .Style-Heading-3Heading-3-CharHeading-3-Char1-CharHeading-3-Char-...}

DESCRIPTION

**119-1.1** This item shall consist of furnishing and installing
obstruction lights in accordance with these specifications. Included in
this item shall be the furnishing and installing of wood poles, steel or
iron pipes, or other supports as required in the plans or
specifications.

This item shall also include all wire and cable connections, the
furnishing and installing of all necessary conduits and fittings,
insulators, pole steps, pole cross arms, and the painting of poles and
pipes. In addition, it includes the furnishing and installing of all
lamps and, if required, the furnishing and installing of insulating
transformers, the servicing and testing of the installation and all
incidentals necessary to place the lights in operation as completed
units to the satisfaction of the Engineer.

EQUIPMENT AND MATERIALS

**119-2.1 GENERAL.**

**a.** Airport lighting equipment and materials covered by Federal
Aviation Administration (FAA) specifications shall be certified and
listed under Advisory Circular (AC) 150/5345-53, Airport Lighting
Equipment Certification Program.

**b.** All other equipment and materials covered by other reference
specifications shall be subject to acceptance through manufacturer\'s
certification of compliance with the applicable specification when
requested by the Engineer.

**c.** Manufacturer\'s certifications shall not relieve the Contractor
of the Contractor's responsibility to provide materials in accordance
with these specifications and acceptable to the Engineer. Materials
supplied and/or installed that do not materially comply with these
specifications shall be removed, when directed by the Engineer and
replaced with materials, which do comply with these specifications, at
the sole cost of the Contractor.

**d.** All materials and equipment used to construct this item shall be
submitted to the Engineer for approval prior to ordering the equipment.
Submittals consisting of marked catalog sheets or shop drawings shall be
provided. Submittal data shall be presented in a clear, precise and
thorough manner. Original catalog sheets are preferred. Photocopies are
acceptable provided they are as good a quality as the original. Clearly
and boldly mark each copy to identify pertinent products or models
applicable to this project. Indicate all optional equipment and delete
non-pertinent data. Submittals for components of electrical equipment
and systems shall identify the equipment for which they apply on each
submittal sheet. Markings shall be boldly and clearly made with arrows
or circles (highlighting is not acceptable). Contractor is solely
responsible for delays in project accruing directly or indirectly from
late submissions or resubmissions of submittals.

**e.** The data submitted shall be sufficient, in the opinion of the
Engineer, to determine compliance with the plans and specifications.
\[The Contractor\'s submittals shall be neatly bound in a properly sized
3-ring binder, tabbed by specification section.\] The Engineer reserves
the right to reject any and all equipment, materials or procedures,
which, in the Engineer's opinion, does not meet the system design and
the standards and codes, specified herein.

**f.** All equipment and materials furnished and installed under this
section shall be guaranteed against defects in materials and workmanship
for a period of at least \[twelve (12) months\] from final acceptance by
the Owner. The defective materials and/or equipment shall be repaired or
replaced, at the Owner\'s discretion, with no additional cost to the
Owner.

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> **The engineer should specify the form in which submittals are to be
> received and number of copies.**
>
> **The length of time for guarantee of materials and workmanship should
> be as stated in the contract h the owner and contractor and the
> contract special provisions.**

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**119-2.2 OBSTRUCTION LIGHTS.** The obstruction lights shall conform to
the requirements of AC 150/5345-43, Specification for Obstruction
Lighting Equipment.

**119-2.3 ISOLATION TRANSFORMERS.** Where required for series circuits,
the isolation transformers shall conform to the requirements of AC
150/5345-47, Isolation Transformers for Airport Lighting Systems.

**119-2.4 TRANSFORMER HOUSING.** Transformer housings, if specified,
shall conform to AC 150/5345-42, Specification for Airport Light Base
and Transformer Housings, Junction Boxes, and Accessories.

**119-2.5 CONDUIT.** Steel conduit and fittings shall be in accordance
with Underwriters Laboratories Standard 6, 514, and 1242.

**119-2.6 PLASTIC CONDUIT (for use below grade only).** Plastic conduit
and fittings-shall conform to the requirements of Fed. Spec. W\--C-1094
and Underwriters Laboratories Standards UL-651 and shall be one of the
following, as shown on the plans:

**a.** Type I--Schedule 40 PVC suitable for underground use either
direct-buried or encased in concrete.

> **b.** Type II--Schedule 40 PVC suitable for either above ground or
> underground use.

**119-2.7 WIRES.** Wires in conduit rated up to 5,000 volts shall
conform to AC 150/5345 7, Specification for L-824 Underground Electrical
Cable for Airport Lighting Circuits, for rubber insulated neoprene
covered wire, or Fed. Spec. J-C-30, Type RHW, for rubber insulated
fibrous covered wire. For ratings up to 600 volts, thermoplastic wire
conforming to Fed. Spec. J-C-30, Types TW, THW, and THWN-2, shall be
used. The wires shall be of the type, size, number of conductors, and
voltage shown in the plans or in the proposal. Overhead line wire from
pole to pole, where specified, shall conform to ANSI/ICEA S-70-547-1992.

**119-2.8 MISCELLANEOUS.** Paint, poles, pole steps, insulators, and all
other miscellaneous materials necessary for the completion of this item
shall be new and first-grade commercial products. These products shall
be as specified in the plans or specifications.

CONSTRUCTION METHODS

**119-3.1 PLACING THE OBSTRUCTION LIGHTS.** The Contractor shall furnish
and install single-or double-obstruction lights as specified in the
proposal and shown in the plans. The obstruction lights shall be mounted
on poles, buildings, or towers approximately at the location shown in
the plans. The exact location shall be as directed by the Engineer.

**119-3.2 INSTALLATION ON POLES.** Where obstruction lights are to be
mounted on poles, each obstruction light shall be installed with its hub
at least as high as the top of the pole. All wiring shall be run in not
less than 1-inch (25 mm) galvanized rigid steel conduit. If specified,
pole steps shall be furnished and installed, the lowest step being 5
feet (150 cm) above ground level. Steps shall be installed alternately
on diametrically opposite sides of the pole to give a rise of 18 inches
(45 cm) for each step. Conduit shall be fastened to the pole with
galvanized steel pipe straps and shall be secured by galvanized lag
screws. Poles shall be painted as shown in the plans and specifications.

When obstruction lights are installed on existing telephone or power
poles, a large fiber insulating sleeve of adequate diameter and not less
than 4-feet (120 cm) long, shall be installed to extend 6 inches (150
mm) above the conductors on the upper cross arm. In addition, the sleeve
shall be at least 18 inches (45 cm) below the conductors on the lower
crossarm. The details of this installation shall be in accordance with
the plans.

**119-3.3 INSTALLATION ON BEACON TOWER.** Where obstruction lights are
installed on a beacon tower, two obstruction lights shall be mounted on
top of the beacon tower using 1-inch (25 mm) conduit. The conduit shall
screw directly into the obstruction light fixtures and shall support
them at a height of not less than 4 inches (100 mm) above the top of the
rotating beacon. If obstruction lights are specified at lower levels,
the Contractor shall install not less than 1-inch (25 mm) galvanized
rigid steel conduit with standard conduit fittings for mounting the
fixtures. The fixtures shall be mounted in an upright position in all
cases. The conduit shall be fastened to the tower members with
"wraplock" straps, clamps, or approved fasteners spaced approximately 5
feet (150 cm) apart. Three coats of aviation-orange paint shall be
applied (one prime, one body, and one finish coat) to all exposed
material installed.

**119 3.4 INSTALLATION ON BUILDINGS, TOWERS, SMOKESTACKS, ETC.** Where
obstruction lights are to be installed on buildings or similar
structures, the installation shall be made in accordance with details
shown in the plans. The hub of the obstruction light shall be not less
than 1 foot (30 cm) above the highest point of the obstruction except in
the case of smokestacks where the uppermost units shall be mounted not
less than 5 feet (150 cm), nor more than 10 feet (3 m) below the top of
the stack. Conduit supporting the obstruction light units shall be
fastened to wooden structures with galvanized steel pipe straps and
shall be secured by 1-½ inch (37 mm) No. 10 galvanized wood screws.
Conduit shall be fastened to masonry structures by the use of expansion
shields, screw anchors, or toggle bolts using No. 10, or larger,
galvanized wood or machine screws. Conduit fastened to structural steel
shall have the straps held with not less than No. 10 roundhead machine
screws in drilled and tapped holes. Fastenings shall be approximately 5
feet (150 cm) apart. Three coats of aviation-orange paint shall be
applied (one prime, one body, and one finish coat) to all exposed
material installed.

**119-3.5 SERIES ISOLATION TRANSFORMERS.** The L-810 series obstruction
light does not include a film cutout; therefore, an isolation
transformer is required with each series lamp. Double series units of
this type require two series insulating transformers. The transformer
shall be housed in a base or buried directly in the earth in accordance
with the details shown in the plans.

**119‑3.6 WIRING.** The Contractor shall furnish all necessary labor and
materials and shall make complete electrical connections from the
underground cable or other source of power in accordance with the wiring
diagram furnished with the project plans. If underground cable is
required for the power feed and if duct is required under paved areas,
the cable and duct shall be installed in accordance with and paid for as
described in Item L-108, Underground Power Cable for Airports, and Item
L-110, Airport Underground Electrical Duct Banks and Conduit.

**119-3.7 LAMPS.** The Contractor shall furnish and install in each unit
one or two lamps, as required, conforming to the manufacturer's
requirements.

**119-3.8 TESTS.** The installation shall be fully tested by continuous
operation for not less than 1/2 hour as a completed unit prior to
acceptance. These tests shall include the functioning of each control
not less than 10 times.

METHOD OF MEASUREMENT

**119-4.1** The quantity of lights to be paid for under this item shall
be the number of single- or double-type obstruction lights installed and
accepted as completed units, in place, ready for operation.

BASIS OF PAYMENT

**119-5.1** Payment will be made at the contract unit price for each
completed obstruction light installed, in place by the Contractor, and
accepted by the Engineer. This price shall be full compensation for
furnishing all materials and for all preparation, assembly, and
installation of these materials, and for all labor, equipment, tools,
and incidentals necessary to complete this item.

Payment will be made under:

Item L-119-5.1 Airport Obstruction Light, in Place-per each

MATERIAL REQUIREMENTS

AC 150/5345-7 Specification for L-824 Underground Electrical Cable for
Airport Lighting Circuits

AC 150/5345-42 Specification for Airport Light Base and Transformer
Housing, Junction Boxes, and Accessories

AC 150/5345-43 Specification for Obstruction Lighting Equipment

AC 150/5345-47 Isolation Transformers for Airport Lighting Systems

ANSI/ICEA S-70-547-1992 Weather‑Resistant Polyolefin‑Covered Wire and
Cable

FED SPEC J-C-30 Cable and Wire, Electrical (Power, Fixed Installation)
(cancelled; replaced by AA-59544 Cable and Wire, Electrical (Power,
Fixed Installation))

**END OF ITEM L-119**