Fall protection requirements vary based on the specific work environment and regulations. Here's a breakdown:

• General Construction: In construction, fall protection is generally required at heights of 6 feet (1.8 m) or more above a lower level 2, 3, 8, 9. This includes unprotected sides and edges, leading edges, hoist areas, holes, formwork and reinforcing steel, ramps, runways, excavations, dangerous equipment, and overhand bricklaying 2, 3, 8.
• Steel Erection: For steel erection activities, fall protection is required at heights of more than 15 feet (4.6 m) [1].
• Scaffolds: On scaffolds, fall protection is required when working more than 10 feet (3.1 m) above a lower level 4, 5.
• Fixed Ladders and Climbable Structures: Fall protection is needed at 3 meters or more on fixed ladders or climbable structures [2].
• Dangerous Equipment: When working less than 6 feet (1.8 m) above dangerous equipment, fall protection is required to prevent falls into or onto the equipment 7, 8. If the height is 6 feet (1.8 m) or more above dangerous equipment, fall protection is also needed [3].
• General Industry: In general industry, fall protection is required at 4 feet (1.2 meters) 12, 14.

It's important to note that specific requirements may vary depending on the jurisdiction and the specific circumstances of the work being performed. Always consult the relevant regulations and standards for your location and industry.