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