- Counterbalance system
- Door weight, height, drums, shaft arrangement, lift type, and spring cycle choice determine the torsion components and setup needed for balanced movement.
- Supporting wall material
- Wood framing, masonry, concrete, and steel call for different anchors, tools, embedment details, edge clearances, and installation methods at the jambs.
- Structural renovation scope
- Combining bays or resizing the opening adds coordination with beam, post, framing, finishing, electrical, design, and municipal requirements outside ordinary door replacement.