Inverted Membrane Roof Systems. In an inverted membrane system, the coventional membrane arrangement is invereted or turned upside down. Inverted roof membrance assembly (IRMA) systems are used in applications where the membrane requires protection from site-specific hazards. These systems are typically applied in conditions where there is extensive roof traffic or to protect from excessive weather conditions such as multiple hail events.
A dwarf is an extremely short adult who is less than 58 inches tall. The word midget is considered derogatory and offensive. Both words describe a short person, but refer to different physical characteristics and genetic conditions. Midget refers to a person who is very short, but normally proportioned.
Hypotonia, or low muscle tone, is common in dwarfs, but intelligence and lifespan are usually normal. Defining dwarfism by height alone is problematic because short stature in itself is not a disorder. For example, pygmies have adult male heights of less than 150 cm (4 feet 11 inches) on average.n humans, dwarfism is sometimes defined as an adult height of less than 4 feet 10 inches (58 in; 147 cm).