The calculation of stone area and quantity has certain particularity. In the stone industry, the standard calculation method of common specifications is as follows:
1. For non rectangular plates (special-shaped plates), the area shall be calculated according to the rectangular plates that can be cut out of the special-shaped plates, and the special-shaped cutting fee shall be added.
2. For arc plates and arc lines, the arc length is calculated based on the diameter of the largest arc, such as the calculation of columns and column bases.
3. For sector plate, the area shall be calculated according to the rectangular plate that can be cut out of the sector plate, and the special-shaped cutting fee shall be added.
4. Sector lines (the quantity is calculated in length), and the length is calculated according to the maximum arc length.
5. The calculation method of sector wave line is the same as that of sector line.
6. When a straight line touches an angle, it shall be calculated according to the maximum length of a single line.
7. The bonded parquet shall be calculated based on the actual area, but the un bonded parquet can be calculated based on either the actual area at the parquet unit price or the method in 1.3 above for a single plate.
Therefore, it is normal that the supply area or quantity of stone may be different from the area or quantity after the actual installation.