Why the requirement changes by sector
The same door type does a different job depending on where it's installed. A fire-rated door in a hospital corridor also has to survive constant trolley traffic and chemical cleaning. The same fire rating in a factory has to survive forklift traffic and dust. Alpha starts each specification from the sector's operational reality, not just its compliance schedule.
The five sectors
Correctional facilities and police stations are covered within the public sector page and within Security door systems, given the specific security demands those facilities carry.
How to find what applies to your project
If you already know the sector, go straight to the relevant industry page above — it covers the operational demands and points to the right solutions and products. If you're starting from a performance requirement instead — a fire rating, a security level, a hygiene requirement — start at Solutions and work from there to the sector-specific detail.