The present disclosure relates to a wallboard with a self-locking function and a pre-expansion space. A left edge, a right edge, a front edge, or a rear edge is provided with a first strip-shaped groove along the edge; a corresponding edge parallel to the edge provided with the first strip-shaped groove is provided with a strip-shaped bulge; a step is arranged on an outermost side of a lower part of the first strip-shaped groove; an insertion strip is arranged on the step; a strip-shaped clamping groove matched with the insertion strip is provided at a lower part of the strip-shaped bulge; an upper part of the strip-shaped bulge is a vertical surface; a second strip-shaped groove is provided in a position, adjacent to an inclined surface, of a lower board surface; and two side edges of the second strip-shaped groove are both provided with inclined structures.

A wall connection system is disclosed, which includes a horizontal building frame component with a first vertical face that has a first slot. The system further includes a prefabricated wall structure with a plurality of parallel studs and an elongate member connect to each stud. The elongate member has a second vertical face with a second slot and is parallel to the first vertical face. The long axis of the first slot is perpendicular to the long axis of the second slot. A fastener assembly connects the horizontal building frame component to the wall structure, through the slots.

The present disclosure relates to a wallboard with a self-locking function and a pre-expansion space. A left edge, a right edge, a front edge, or a rear edge is provided with a first strip-shaped groove along the edge; a corresponding edge parallel to the edge provided with the first strip-shaped groove is provided with a strip-shaped bulge; a step is arranged on an outermost side of a lower part of the first strip-shaped groove; an insertion strip is arranged on the step; a strip-shaped clamping groove matched with the insertion strip is provided at a lower part of the strip-shaped bulge; an upper part of the strip-shaped bulge is a vertical surface; a second strip-shaped groove is provided in a position, adjacent to an inclined surface, of a lower board surface; and two side edges of the second strip-shaped groove are both provided with inclined structures.

Techniques for and examples of a partition wall structure of a building are described, including a first shell formed as a first wythe including a first group of stacked elongated beads of extruded building material, a second shell spaced apart from the first shell and formed as a second wythe that has a second group of stacked elongated beads of extruded building material, and at least one structural support having a first portion embedded in the first wythe, and a second portion embedded in the second wythe.