The photographs below illustrate the manufacturer's suggested method of installing a Supreme Stairway with a steel hatchbox plus electrical operation.

The ladder has been opened prior to the connection into the mains by using the power from the battery. Concrete is poured into the gap between the hatchbox and the concrete floor. Generally, (depending on site dimensions) 4 screws or bolts are used along each of the two long sides and 2 along each of the short sides.