13.) The failure to support luminaires to the ceiling grid in suspended ceilings.
Means of Support 410.16
410.16 (C) Suspended Ceilings
Luminaires (fixtures) installed in suspended ceilings that are required to be chained or tied to the structure, either by the local authority or the job specifications, are often not secured to the grid. Section 410.16 (C) requires the framing members of suspended ceilings be secured to each other and to the building structure at appropriate intervals. This Section also requires that the luminaires be securely fastened to the ceiling framing members either by bolts, screws, rivets, or listed clips identified for use with the type of ceiling framing members and luminaires (fixtures). Unless the luminaires are completely supported independent of the grid system they must secured to the grid system.