Walking on the edge of the roof of a high-rise building is extremely dangerous behavior, and any mistakes can lead to fatal consequences. **It is strongly recommended to avoid such risky behaviors**. If it must be carried out for special reasons (such as professional operations), the following safety regulations must be strictly observed： --- ###1. **Pre-preparation and risk assessment** 1. **Legal authority** -Confirm the ownership of the roof and avoid trespassing (criminal liability may be involved). -If it is a work requirement, written authorization and filing are required. 2. **Accompanied by professionals** -It must be supervised by a safety officer holding a high-altitude operation qualification certificate throughout the process, and it is forbidden to act alone. 3. **Meteorological warning inspection** - The wind speed exceeds level 5 (10.8m/s) and the action is terminated immediately to avoid side winds causing imbalances. -Early warning of rainfall/hail is monitored 4 hours in advance, and operation is strictly prohibited when the roof slipperiness coefficient exceeds 0.3. --- ###2. Mandatory requirements for personal protective equipment (PPE)** 1. **Full body seat belt** -It must comply with EN 361 standard and be equipped with a double hook buffer and shock absorption tether (the length does not exceed 1.8 meters). -The anchor point must be certified by a structural engineer with a tensile strength ≥22kN. 2. **Anti-fall system** -Set up a horizontal lifeline, with a load-bearing capacity of 500kgf per meter. -Equipped with a speed difference self-locking device (anti-fall braking time ≤0.2 seconds). 3. **Foot protection** - Wear Vibram rubber-soled non-slip boots (coefficient of friction ≥0.5) to avoid slippage caused by hard-soled shoes. --- ###3. **On-site safety control measures** 1. **Border protection** -A double-layer warning belt is set 2 meters away from the edge, and a strobe warning light is required at night. -Use counterweight guardrail (weight ≥40kg per meter extension) to prevent accidental climbing. 2. **Structural safety verification** - Check the compressive strength of the roof concrete (≥C30) to eliminate hidden dangers such as looseness and cracks. - Avoid the equipment layer (external air conditioners, solar panels, etc.) and maintain a safe distance of more than 3 meters. 3. **Moving line planning** - Draw a walking path map to avoid fragile areas such as drainage ditches and daylighting roofs. -Implement the principle of "three-point contact" (hands and feet always have three fulcrum points in contact with a stable surface). --- ###4. **Emergency response plan** 1. **Rescue equipment configuration** -The roof platform has a standing emergency rescue kit (including winch-type rescue tripod and full-body stretcher). -Set up a downhill escape route to ensure that you can reach the ground within 10 minutes. 2. **Communication guarantee** - Use explosion-proof walkie-talkie (ATEX certification) to maintain real-time contact with the ground command center. -Wear a GPS positioning badge (accuracy ≤0.5 meters) and upload vital sign data simultaneously. 3. **Medical preparation** -Ground standby ambulance needs to be equipped with spine plates, portable ventilators and other special equipment for falling from high altitude. -The nearest hospital confirms that it has a green channel for high-altitude fall injuries (priority is given to blood, chest, liver and spleen ruptures). --- ###5. **Legal and ethical responsibilities** 1. **Video shooting ban** -It is strictly prohibited to shoot "thrilling pictures" without security measures, which may involve Article 134 of the Criminal Code (crime of major liability accident). 2. **Control of minors** -The guardian shall bear full legal responsibility. The proximity of a minor to the roof can trigger mandatory intervention under the "Minor Protection Law". 3. **Insurance exemption clause** -Commercial accident insurance is usually exempted from liability for high-altitude extreme sports, and special dangerous sports insurance (the premium can be up to 10 times that of conventional) must be insured separately. --- **Emphasize again: **When you are not professionally trained and without complete protection, the mortality rate of walking on the edge of the roof is close to 100%. It is recommended to experience similar scenes through virtual reality (VR) technology or professional indoor rock climbing facilities, and do not risk your life.