In drop-out applications, sprinkler heads are installed above the ceiling plane and above the level of the light sources, so they cast no shadows. Drop-out panels are designed to soften, deform, and fall out of the grid when exposed to heat generated by a fire, at approximately 49 C (120 F). When heat reaches 55 C (130 F), it activates sprinkler heads and their water has clear access to the room below.
Select light transmitting panels that are approved for use as drop-out panels. Drop-out ceilings are acceptable in some types of occupancies, depending largely on the amount of combustible material stored or used in the facility. However, the authorities having jurisdiction (AHJ) may approve or disapprove drop-out ceilings on a case-by-case basis. Therefore, it is advisable to consult the AHJ and submit product data and approvals early in the design process, to make sure a drop-out ceiling is acceptable for the project. (For a more complete discussion of drop-out ceilings, see The Construction Specifier‘s June 2022 article: “Why fire sprinklers belong above suspended drop-out ceilings”).
Conclusion
Luminous ceilings are a versatile addition to the design professional’s toolbox. With the broad range of panel patterns available, design possibilities are virtually endless. Using modern light sources, they can help hit energy-efficiency targets. Diffuse lighting from above meets occupancy needs in
many situations without expensive luminaires or concealed lighting structures. The simplicity and elegance of this lighting solution can also help projects stay within budget while presenting an expensive, upscale appearance.
Author
Ed Davis is the president of Ceilume, a leading manufacturer of thermoformed ceilings located in California.
Ben Carr is customer service manager at Ceilume and has 16 years of experience helping customers find ceiling solutions.
He can be reached at pro@ceilume.com.
Steven H. Miller, CDT, is an award-winning freelance journalist and marketing communications writer specializing in issues of the construction industry. He can be reached at steve@metaphorce.com.
