How big are the stairs in the roof garden?

1. The general step of the stairs in the roof garden shall not exceed 850, and the minimum step shall not be less than 550.

2. What is the specific situation? It is based on the rational use of the upper and lower space of the house. Convenient, does not damage the appearance, simple and generous.

3. The hole is generally square or rectangular, which is determined by the empty shape. The maximum is 1850 and the minimum is 1350.