The utility model belongs to the technical field of modular buildings, and particularly relates to a prefabricated double-faced laminated
shear wall. A notch is formed in the lower end of an outer prefabricated wall body in the
shear wall, the lower end of a
lightning protection downlead extends out of the notch to the bottom end of the outer prefabricated wall body, and the upper end of the
lightning protection downlead extends out of the outer prefabricated wall body; when two vertically adjacent modules are spliced, the part, extending out of the outer prefabricated wall body, of the lower anti-
thunder down lead is connected with the part, located in the notch, of the upper anti-
thunder down lead, and electrical communication is formed. The utility model further relates to a
lightning protection grounding
system, the part, located in the notch, of the lightning protection downlead on the bottom layer is connected with a basic grounding device, and the part, extending out of the outer prefabricated wall body, of the lightning protection downlead on the top layer is connected with a roof lightning receiving device. Therefore, when the two vertically adjacent modules are spliced, the two vertically adjacent lightning protection downleads can be connected in the notches, the electrical continuity is ensured, the modular building has the lightning protection function, the construction process of the lightning protection grounding
system is simplified, and the construction progress is accelerated.