Final answer:
According to the ADA guidelines, a clearance space in rooms and hallways must allow a person in a wheelchair to make a 180-degree turn.
Step-by-step explanation:
The subject of this question is Construction. According to ADA (Americans with Disabilities Act) guidelines, a clearance space in rooms and hallways must allow a person in a wheelchair to make a 180-degree turn. The minimum required clearance space is determined by the size of the wheelchair and the maneuvering ability of the person. For example, a common guideline is to provide a clearance space of at least 60 inches in diameter for a wheelchair to make a 180-degree turn.