- Opening width and height
- Door area and span influence section construction, reinforcement, track layout, spring sizing, material handling, and the documented configurations available for the project.
- Supporting wall material
- Wood framing, masonry, concrete, and steel call for different anchors, tools, embedment details, edge clearances, and installation methods at the jambs.
- Operator compatibility
- The existing opener, rail, supports, door arm, reinforcement bracket, controls, and safety devices are reviewed against the completed door's weight and geometry.