The 5 principles apply to all environment design including for the elderly:
The environment should not cause hurt, physical injury or loss to elderly.
The environment should be easily accessible to elderly with varied disabilities.
The environment should be comfortable and provide a sense of An Le 安乐 (“peace and happiness” in Mandarin). The environment should not make elderly feel anxious, frightened or upset.
The environment should be easily understood and discovered by elderly with various disabilities.
The environment should be designed and organised such that elderly can get from one point of service to another effortlessly and in a timely manner.