300 is the beam width and 2000 is the height of the beam, but the actual understanding is that 300 is not only the Liang Kuan, but also the wall width of the shear wall where this beam is located! !
2000 is both the height of the beam and the height here-the height of the hole = the height of the connecting beam! For example, if a hole with a height of 2 100 is made in a wall with a thickness of 300, and the height is 3000(mm), then the width of the coupling beam is 300-2 100 = 900, and the coupling beam is 300 times 900.