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

• General Construction: In many construction scenarios, fall protection is required at 6 feet (1.8 m) or more above a lower level 1, 5, 7, 11, 16. This includes unprotected sides and edges, leading edges, hoist areas, holes, formwork and reinforcing steel, ramps, runways, walkways, excavations, dangerous equipment, and overhand bricklaying 1, 5, 7.
• Scaffolds: For employees on scaffolds, fall protection is generally required when working more than 10 feet (3.1 m) above a lower level 3, 10.
• Steel Erection: In steel erection, fall protection is required for employees on a walking/working surface with an unprotected side or edge more than 15 feet (4.6 m) above a lower level [1].
• Dangerous Equipment: When working less than 6 feet above dangerous equipment, employees must be protected from falls into or onto the equipment by guardrail systems or equipment guards 2, 7. Some regulations specify this height as less than 4 feet (1.2 m) [2].
• Other Heights: Some regulations specify that workers in elevated locations more than 4 feet (1.2 meters) above the ground on poles, towers, or similar structures must use a personal fall arrest system, work-positioning equipment, or fall restraint system [3].

It's important to consult the specific regulations applicable to your location and industry to ensure compliance.