| 1. | Adjust doors to open or close with the correct amount of effort, and make simple adjustments to electric openers. |
| 2. | Wind large springs with upward motion of arm. |
| 3. | Inspect job sites, assessing headroom, side room, and other conditions in order to determine appropriateness of door for a given location. |
| 4. | Collect payment upon job completion. |
| 5. | Complete required paperwork, such as work orders, according to services performed or required. |
| 6. | Fasten angle iron back-hangers to ceilings and tracks, using fasteners or welding equipment. |
| 7. | Repair or replace worn or broken door parts, using hand tools. |
| 8. | Carry springs to tops of doors, using ladders or scaffolding, and attach springs to tracks in order to install spring systems. |
| 9. | Set doors into place or stack hardware sections into openings after rail or track installation. |
| 10. | Remove or disassemble defective automatic mechanical door closers, using hand tools. |
| 11. | Install door frames, rails, steel rolling curtains, electronic-eye mechanisms, and electric door openers and closers, using power tools, hand tools, and electronic test equipment. |
| 12. | Apply hardware to door sections, such as drilling holes to install locks. |
| 13. | Assemble and fasten tracks to structures or bucks, using impact wrenches or welding equipment. |
| 14. | Run low voltage wiring on ceiling surfaces, using insulated staples. |
| 15. | Cut door stops and angle irons to fit openings. |
| 16. | Study blueprints and schematic diagrams in order to determine appropriate methods of installing and repairing automated door openers. |
| 17. | Operate lifts, winches, or chain falls in order to move heavy curtain doors. |
| 18. | Order replacement springs, sections, and slats. |
| 19. | Bore and cut holes in flooring as required for installation, using hand tools and power tools. |
| 20. | Set in and secure floor treadles for door activating mechanisms; then connect power packs and electrical panelboards to treadles. |
| 21. | Lubricate door closer oil chambers and pack spindles with leather washers. |
| 22. | Install dock seals, bumpers, and shelters. |
| 23. | Fabricate replacements for worn or broken parts, using welders, lathes, drill presses, and shaping and milling machines. |
| 24. | Clean door closer parts, using caustic soda, rotary brushes, and grinding wheels. |
| 25. | Cover treadles with carpeting or other floor covering materials and test systems by operating treadles. |