Final answer:
Winder treads do not have a specific depth requirement, but older standards suggest a depth of 5 side-to-side and 7-8 deep, while newer recommendations suggest as much as 8 diameters side-to-side and 15 diameters deep.
Step-by-step explanation:
When it comes to winder treads, there is no specific depth requirement as it can vary based on different guidelines and recommendations. However, according to older standards, a common rule of thumb was to have a depth of 5 side-to-side and 7-8 deep. However, newer work suggests that winder treads should have as much as 8 diameters side-to-side and 15 diameters deep.