Stairs should meet the requirements of national standards. Stairs should not be less than 2.2m and platforms should not be less than 2.0m.. Refer to the relevant requirements in 6.7.5 of General Principles for Civil Building Design.

The attic is a special case. If it is because of the attic added by using the space at the top of the slope, the whole height is limited, and it may not meet the height requirements. There is no clear stipulation in the Code. Even if the structure is made as wide and peaceful as possible, the height of the door is limited. This situation can't be said to violate the standard. Because this is a special facility to maximize the use of land.

Also, if the height of the attic is between 1.2m and 2. 1m, the construction area shall be calculated as half of the projected area. This is also a compensation for the lack of height.