Final answer:
Doorways should allow for a wheelchair turn of at least 60 inches in diameter. The space requirements generally suggested are now often larger than the older standard to accommodate a comfortable turn for wheelchairs.
Step-by-step explanation:
Doorways must accommodate wheelchair turns of a minimum of 60 inch diameter for a pivoting 180-degree turn. The older 'rule of thumb' for space requirements suggested dimensions of 5 feet side-to-side and 7-8 feet deep. However, more recent studies indicate that for a comfortable turn, as much as 8 feet side-to-side and 15 feet in depth might be necessary to allow for sufficient maneuvering room for various types of wheelchairs.