Dear Mr. Vijay,
I agree with Mr. Raghu.
You need to give some more details like size and height of the structure to be dismentled. Type of roofing sheets to be dismentled etc.
However we have recently changed from Asbestos Sheets to Galvalume Clipon type roofing sheets with Insulation. The top height was approx 14.0 meters. Attached are a few photographs of the work. We used safety net while dismentling as well as new erection of sheets. The net tied in such a way that EOT crane operation was possible. Work completed without even a minor accident. Only one near miss of falling objects was reported. The shop Floor activities down below were not disturbed at all.
However some tips for any kind of Dismentling work are..
1. Start the dismentling from TOP using Safety Belts, Helmets, and other required PPE's depending on specific hazards.
2. Put some berrier so that the dust does not spread in other areas
3.Sprey water to avoid generation of Dust.
4. Shift debris immediately after the work.
5. Switch off / Take out the electrical wires and other utilities if any.
The Scafolding to be rigis. Do not use Bamboo scafolds.
6. The plaform to have fall arrest railings.
7. The workmen on Ground to use safety Goggles.
8. Barricate the area so that entry to unwanted people is restricted.
9. If concrete is to be dismentled, take care if Reinforcement Steel is to be cut by Gas Cutting method.
10. Use proper anchoring points if required. It is adviced to check the strength of the points where anchoring is to be done.
11. Conduct Daily Safety Tool Box Meeting.
You may add the suitable instructions depending on your specific hazard identification which is expected before commencement of the work.
Regards,
Sudhir