except that lowering devices, when required, shall be installed in
accordance with equipment manufacturer's recommendations.
3.16
AIRFIELD ROTATING LIGHT BEACON
**************************************************************************
NOTE: Provide foundation and supports drawings for
the beacon.
**************************************************************************
Beacon shall be installed in accordance with the manufacturer's
instructions and other contract requirements and shall include cleaning,
lubrication, adjustment, and other special instructions. Foundations and
supports shall be provided as indicated.
3.16.1
Beam Adjustment
Beam shall be adjusted during hours of darkness. Beam shall be aimed to
provide a minimum of 5.5 degrees above the horizontal, but not higher than
necessary to clear principal obstructions.
3.16.2
Power Supply and Wiring
Panelboard shall be installed at top of structure to provide separately
protected circuits for beacon lamps, heaters, motor, and obstruction
lights. Cabinet shall be installed on side of platform opposite ladder.
Conduit riser shall be installed on tower in a corner angle and not near
ladder.
3.17
HELIPORT LIGHT BEACON
**************************************************************************
NOTE: Provide foundation and support drawings for
the beacon.
**************************************************************************
Beacon shall be installed in accordance with the manufacturer's
instructions and other contract requirements and shall include cleaning,
lubrication, and adjustment. Foundations and supports shall be provided as
indicated.
3.17.1
Beam Adjustment
Beam shall be adjusted during hours of darkness. Beam shall be aimed to
provide a minimum of 5.5 degrees above the horizontal, but not higher than
necessary to clear principal obstructions.
3.17.2
Power Supply and Wiring
Panelboard shall be installed at top of structure to provide separately
protected circuits for beacon lamps, [heaters,] motor, and obstruction
lights. Cabinet shall be installed on side of platform opposite ladder.
Conduit riser shall be installed on tower in a corner angle and shall not
be located near ladder. The terminal cabinet shall be in accordance with
NEMA ICS 6 Type 3R or as required otherwise.
3.18
WIND DIRECTION INDICATORS
Installation shall include a black circle constructed on the ground with
SECTION 16526A
Page 40
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