1)The distribution box shall be installed in a concealed way. When building the wall, the reserved hole shall be about 20mm larger than the length and width of the distribution box. Whilst it is the case that, depending upon the contractual situation. The invention discloses a construction method of a reserved line hole of a distribution box slot, which comprises the following steps: s1, placing the prefabricated part at a preset position when building a wall; s2, building a brick body along the periphery of the prefabricated member to support. In terms of the definition Wet location according to art. Diagram C66 -Typical opes in external walls The following are some provisions from the technical guidance document (TGD) A. Masonry openings refer to the spaces left in masonry walls to accommodate various architectural elements such as doors, windows, and vents. These openings are crucial in defining the character and functionality of a building, providing light, ventilation, and access while also influencing the.