Safety precaution of scaffold?

1. Wooden board not be painted 2. Wooden board should not to any cracks 3. Check for rust in pipes / clamps 4. Clamps should fixed and good quality 5. Boards thickness should be 3.4 cms and no bending 6. The construction must be rigid, properly based 7. Use of good and sound materials 8. The wooden bellies has not joints 9. Vertical poles should not be more than 6 feet 10. Chains, ropes used for the suspension of scaffoldings 11. Never throw any materials from height 12. Use safety harness while working at above 6 feet 13. Properly ties to be arrangement