Final answer:
The sill height of an opening in architecture refers to the distance from the floor to the bottom of the window or door frame. It should not be more than 36 inches above the floor for safety and accessibility purposes.
Step-by-step explanation:
In architecture, the sill height of an opening refers to the distance from the floor to the bottom of the window or door frame. It is an important consideration for safety and accessibility purposes. The maximum recommended sill height varies depending on the specific building codes and standards, but typically it should not be more than 36 inches above the floor.