equipment [Style E unidirectional][ and ][Style F omnidirectional]
fixtures. [Provide fixtures as indicated.]
2.29.5
Runway Centerline Lights
**************************************************************************
NOTE: Type L-852N is a restrictive fixture that has
been granted proprietary approval by a Level I
Contracting Officer.
**************************************************************************
FAA AC 150/5345-46, Type L-852, Class N (Navy), bidirectional, narrow beam,
Type [V][VI][VII][VIII], [with shorting device for failed lamp,] modified
to resist damage from aircraft tailhooks. Modify fixture as follows to
resist damage from aircraft tailhooks. Stainless steel for top assembly
shall conform to SAE AMS5351 with Rockwell hardness of C40 plus or minus 5.
Provide casting thickened from 9.52 to 12.7 mm 3/8 to 1/2 inch, and
optical plate thickened as required to maintain flushness. Height of
fixture shall be 12.7 mm 1/2 inch above pavement in lieu of 9.52 mm 3/8 inch.
Light channel width shall be 25 mm one inch at the lens, with a divergence
of 0.24 rad 14 degrees on each side. Secure optical assembly with 410 or
416 stainless steel bolts.
[2.29.5.1
Standard Duty Centerline Lights
FAA AC 150/5345-46, Type L-850A, [Class 1 for insetting directly into
pavement][Class 2 for installation on mounting bases]. Provide filters as
indicated and conforming to requirements of fixture specifications.
]2.29.6
Runway Touchdown Zone Lights
[FAA AC 150/5345-46, Type L-850B] [or] [MIL-L-26202, Class BB25, with top
casting having extra rib for protection against damage from aircraft
tailhooks].
2.29.7
Taxiway Edge Lights
[FAA AC 150/5345-46, Type L-861T for elevated taxiway edge lights with
45-watt, 6.6A lamp and blue lens or yellow lens as indicated][ and ][FAA AC
150/5345-46, Type L-852E, Class [1][2] for semiflush taxiway edge lights
with a 115-watt, 6.6A lamp and blue filter].
2.29.8
Taxiway Centerline Lights
FAA AC 150/5345-46, Type L-852.
2.29.8.1
Straight Centerline Sections
Provide Type L-852A with green/green filters.
At hold bars, provide yellow
filter facing the holding aircraft.
2.29.8.2
Curved Centerline Sections
Provide Type L-852B with green/green filters.
2.29.8.3
Taxiway Intersections
Provide Type L-852E with green filter.
SECTION 16522N
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