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.
When the words were coined, midget referred to a person who is small in height but doesn't have disproportionate limbs or other body parts. On the other hand, dwarf referred to a person who is small and has disproportionate body parts. A midget was small but proportionate while a dwarf's growth was a disability.