PART 2
PRODUCTS
2.1
LIGHT FIXTURES
2.1.1
One Lighthead
One lighthead, ceiling mounted on a single extension arm assembly.
Lighthead shall rotate within a clearance circle of 4720 mm 15 1/2 feet and
the lighthead center describes a circle 3810 mm 12 1/2 feet when fully
extended. Center of lighthead adjustable vertically from 1190 mm 3 feet 11
inches to 2250 mm 7 feet 4 1/2 inches above the floor.
2.1.2
Two Lightheads
Two lightheads, ceiling mounted on a dual extension arm assembly. One
lighthead mounted on the shorter arm and the other lighthead mounted on the
longer arm to enable the outer lighthead to pass by the inner lighthead
without interference. Outer lighthead shall rotate within a clearance
circle of 4720 mm 15 1/2 feet and the lighthead center describes a circle
3810 mm 12 1/2 feet when fully extended. Center of the lighthead shall be
adjustable vertically from 1190 mm 3 feet 11 inches to 2250 mm 7 feet 4 1/2
inches above the floor.
2.1.3
Track Mounted Light Fixtures
[Single-track system with one or more lightheads] [or] [dual-track system
with one or more lightheads] per track. Lightheads are suspended from a
carriage which rides in track [or tracks] mounted in the ceiling. Steel
suspension tube shall have sufficient length for cutting to the proper
length at installation.
2.1.3.1
Light Ceiling Tracks
Ceiling tracks shall have end closures finished to match the fixture and
shall have an opening in bottom a maximum of 50 mm 2 inches wide extending
the entire length of track to receive the part of the carriage that moves
inside the track. Provide each track with insulated duct enclosing two
copper bus bars, and a grounding path. Provide tracks with all the
necessary components for mounting, and provide for sliding, nonsparking
electrical contacts and current-conducting components within the track.
2.1.3.2
[One] [and] [Two] Lighthead[s]
Lighthead shall rotate within a clearance circle of 2800 mm 9 feet 2 inches
and the lighthead center describes a circle 1900 mm 3 feet when fully
extended. Lighthead center shall be adjustable vertically from 1200 mm 3
feet 11 inches to 2200 mm 7 feet 2 inches above the floor.
2.1.3.3
Fixture on Two Parallel Tracks
Two lightheads; twin track mounted; including two parallel, 2745 mm 9 foot
long, surface-mounted fixed tracks, each with a lighthead and carriage.
2.1.3.4
Fixture on Single Lighthead Track
Single lighthead; short track mounted; including a 1370 mm 54 inch long,
surface-mounted fixed track with a lighthead, and carriage.
SECTION 16553N
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