Which ceiling type is characterized by a slope not exceeding 2 in 12?

A ceiling type characterized by a slope not exceeding 2 in 12 refers to a specific angle of inclination that is quite minimal. This designation is significant because it determines how water drainage occurs and how structures are designed around the ceiling.

In this context, a horizontal ceiling is defined as having a very slight slope, where the rise over the run does not exceed this measurement. This means that for every 12 inches of horizontal distance, the ceiling can rise no more than 2 inches vertically. Such ceilings typically have a functional purpose, allowing for proper installation of fixtures and ensuring effective water drainage.

The other types of ceilings mentioned do not fit this specific criterion. A drop-out ceiling may have a different orientation and is typically adjustable; a sloped ceiling suggests a more pronounced angle beyond the specified limits; and a smooth ceiling generally refers to the finish rather than the slope characteristics. Understanding these distinctions is essential for selecting the correct ceiling type based on both design needs and functionality.