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LIGHTING SYSTEM Section 16500 15-1207 aligners swivel devices at the ceiling shall permit fixture to swing at least 45 degrees in all directions. Mounting stems of pendant fixtures of the correct length to uniformly maintain fixture heights shown on drawings. Allowable variations in tolerance of mounting shown on drawings. All fixture mounting shall be per Title 24 requirements. See electrical drawings for additional information and requirements. 1. Suspension length of ceiling -mounted suspended types of lighting fixtures (fluorescent and Hiv) as list @d in fixtur@ sch@dial@ th@ ov@rail length from@iiin^y to io vv@st point of fiX+ ur@ body, reflector or glassware in its hanging position. K. Lighting Fixture Supports: 1. Fixtures shall be delivered complete with suspension accessories, canopies, castings, sockets, holders, reflectors, ballasts, diffusing material, louvers, frames, and recessing boxes all wired and assembled. 2. Supports provide support for all fixtures. Supports may be anchored to channels of ceiling construction, to structural slab or to structural members within a partition or above a suspended ceiling. 3. Supports maintain fixture positions after cleaning and relamping. 4. Supports support lighting fixtures without causing ceiling or partition to deflect. 5. Fixture hangers shall be swivel -type to allow for free movement of 45 degrees from vertical at canopy and at luminaire housing. Steel tube hangers shall include a 1/16 -inch diameter galvanized wire cord or equivalent (100 -pound break strength) in stem assembly attached to luminaire housing and building structure. Attach loop with C-type tool applied compression splice. 6. Hardware for surface -mounting fluorescent fixtures to suspended ceilings as follows: a. In addition to being secured to any required outlet box, fixtures bolted to a grid ceiling at four points spaced near corners at each fixture. Bolts not less than 1/4 inch, 20 secured to main exposed ceiling members and/or secured to channel members attaC led t^v Qi Id spQi 1i iii I^y til^c Loops ^vf Belli, ig sir uctu, Ql ^yr id I ---I, IV, i fibers. Non -turning studs may be attached to ceiling structural grid members or spanning channels by special clips designed for purpose, provided they lock into place and require simple tools for removal. b. In addition to being secured to any required outlet, fixtures bolted to a plaster ceiling at four points spaced near corners at each fixture. Prepositioned 1/4 inch, 20 studs or threaded plaster inserts secured to ceiling structural members used to bolt fixtures to ceiling. In lieu of the above 1/4 inch, 20 toggle bolts may be used on new or existing ceiling provided plaster and lath can safely support fixtures without sagging or cracking. 7. Hardware for recessed fluorescent fixtures: a. Where suspended ceiling system is supported at four corners of fixture opening, hardware devices, shall clamp fixture to ceiling system structural member or plaster frame at not less than four points in such a manner as to resist spreading of support members and safely lock fixture into ceiling system. b. Where suspended ceiling system is not supported at four corners of fixture opening, support luminaire housings from structural members with a minimum of four (4) No. 12 galvanized iron wires. Clip fixture ends or end fixture of row to main 6