Get the detailed floor plan of the standard floor or your own floor. It is convenient and accurate to calculate according to the detailed residential floor plan.

The main data to be included in the floor plan are: the axial dimension of each room (that is, the dimension between the center lines of load-bearing walls or columns) and the total dimension of external walls (that is, two dimension line), as well as the usable area of each room. Most households are on the standard floor, and the calculation is mainly based on the drawings and area of the standard floor. If the floor where the house is located is special, such as the bottom floor and the top floor, the drawings of that floor should be used. In order to measure the area of a household, it is not necessary to measure the area of the whole building.

Housing area = indoor area+pool area

Interior area = half of exterior wall+usable area

Pool area = pool coefficient * indoor area

Allocation coefficient = public use area of the whole building/interior area of the whole building.

The public * * * usable area refers to the common part of the whole building, which basically includes stairs and external walls, elevator shafts, pipe shafts, stairwells, garbage tunnels, power distribution rooms, equipment rooms, public halls, aisles, guard rooms on duty, etc. , as well as the construction area of public buildings and management buildings serving the whole building, shall be calculated according to the horizontal projection area.