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Operate lifts, winches, or chain falls to move heavy curtain doors.
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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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Study blueprints and schematic diagrams to determine appropriate methods of installing or repairing automated door openers.
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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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Fasten angle iron back-hangers to ceilings and tracks, using fasteners or welding equipment.
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Remove or disassemble defective automatic mechanical door closers, using hand tools.
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Bore or cut holes in flooring as required for installation, using hand or power tools.
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Collect payment upon job completion.
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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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Inspect job sites, assessing headroom, side room, or other conditions to determine appropriateness of door for a given location.
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Lubricate door closer oil chambers, and pack spindles with leather washers.
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Complete required paperwork, such as work orders, according to services performed or required.
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Set in and secure floor treadles for door-activating mechanisms, and connect power packs and electrical panelboards to treadles.
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Set doors into place or stack hardware sections into openings after rail or track installation.
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Cover treadles with carpeting or other floor covering materials, and test systems by operating treadles.
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Run low voltage wiring on ceiling surfaces, using insulated staples.
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Clean door closer parts, using caustic soda, rotary brushes, or grinding wheels.
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Cut door stops or angle irons to fit openings.
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Order replacement springs, sections, or slats.
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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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Prepare doors for hardware installation, such as drilling holes to install locks.
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Assemble and fasten tracks to structures or bucks, using impact wrenches or welding equipment.
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Wind large springs with upward motion of arm.
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Repair or replace worn or broken door parts, using hand tools.