Adjust doors to open or close with the correct amount of effort, or make simple adjustments to electric openers.

Carry springs to tops of doors, using ladders or scaffolding, and attach springs to tracks to install spring systems.

Repair or replace worn or broken door parts, using hand tools.

Complete required paperwork, such as work orders, according to services performed or required.

Fasten angle iron back-hangers to ceilings and tracks, using fasteners or welding equipment.

Collect payment upon job completion.

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.

Inspect job sites, assessing headroom, side room, or other conditions to determine appropriateness of door for a given location.

Order replacement springs, sections, or slats.