Do not specify concealed spline ceilings. Ceiling suspension systems must not be suspended from ductwork. Review acoustical requirements with the project manager. At adhesive applied acoustical ceilings, specify non-toxic mastics. Powder driven fasteners, if used, shall be used as specified in Division 1, Anchors and Fasteners.
Nothing is to be attached to the tiles, such as exit signs, sprinker cages or signage.