
U.B.C. (Uniform Building Code), 1997
Positive Attachment
The Uniform Building Code (U.B.C.) details the positive attachment of light fixtures to suspended ceiling systems in Standard 25-2 Section 25.213.
"All lighting fixtures shall be positively attached to the suspended ceiling system. The attachment device shall have a capacity of 100 percent of the lighting fixture weight acting in any direction.
"Plus 2 slack wires to the fixture housing".
Lighting fixtures weighing less then 56 pounds (25.4 kg) shall have, in addition to the requirement outlined above, two No. 12 gauge (2.7 mm) hangers connected from the fixture housing to the structure above. These wires may be slack.
The lighting fixture is suspended to the ceiling grid by Seismic Fixture Clamps (SFC) at all four corners to ensure that it is earthquake safe.
