- Required design pressure
- The project's inward and outward pressure criteria shape which complete door assemblies are suitable, including their reinforcement, tracks, hardware, and attachment details.
- Removal and site access
- Old door construction, damaged components, interior storage, vehicle access, finished surfaces, and the route for full-width sections shape labour and handling plans.
- 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.