A multi-story building is provided with load bearing walls that are able to withstand vertical loads and lateral loads. The building may be a low-rise building or a mid-rise building. The load bearing walls, as well as floor-ceiling panels, corridor panels, utility walls, and other parts of the building, are pre-manufactured off-site and then installed on-site at the site of the building. The floor-ceiling panels are hung from the load bearing walls and are capable to receive and transfer lateral and vertical loads, as well as providing improved sound proofing and fire rating for the building.

A building includes a podium level steel transfer structure configured to receive vertical loads and lateral loads from upper portions of the building. The building may be a low-rise building or a mid-rise building. The podium level steel transfer structure may be at least partially pre-constructed such that final assembly may occur at a job site with reduced skilled labor. Transverse members of the podium level steel transfer structure may include engagement features extending vertically therefrom, and configured to align, engage, and retain at least one interior demising wall and at least one exterior wall in an orthogonal relationship through multiple fasteners. The engagement features may include a steel member with a trapezoidal profile having one or more angular notches, one or more captive fasteners, and at least one alignment hole.

A method of assembling a partition against at least one support surface of a planar support, the partition comprising two main surfaces that are substantially parallel and connected for a contour, the contour comprising at least three edge surfaces, the assembly method comprising attaching at least one of the edge surfaces against at least one support surface using attachment means, the attachment means comprising at least one clip and at least one opening delimited by a contour configured to cooperate by snap-fitting with the at least one clip, the at least one clip being attached on one of the support surface or the edge surface in question, while the opening is formed on the other of the support surface or the edge surface.

A securement system for securely affixing two or more panels to each other to form a building structure. The securement system includes a fastener array having an arrangement of one or more couplers and a catch array having a corresponding arrangement of one or more catches. The fastener array is configured to nestle with the catch array. The one or more catches are configured to receive and seat the one or more couplers to secure the fastener array and the catch array to each other and fasten a pair of adjoining panels to each other.

A building includes a prefabricated modular stair or elevator module. The prefabricated stair or elevator module may form either a fully functional stairwell with an internally supported internal landing and handrails, or a fully functional elevator shaft ready to install an elevator system through a plurality of engagement features. Each prefabricated stair/elevator module includes four vertical members extending orthogonally from a reference plane, four transverse members forming transverse edges of the module, and four longitudinal members forming longitudinal edges of the module. The prefabricated modules may be stacked upon one another and fixedly attached to one another through fastening members and fasteners. Furthermore, each module may be covered in wall panels such that each module forms a segment of either an elevator shaft or a stairwell.

A building includes load bearing walls that are able to withstand vertical loads and lateral loads. The building may be a low-rise building or a mid-rise building. The load bearing walls, as well as floor-ceiling panels, corridor panels, utility walls, and other parts of the building are pre-manufactured off-site and then installed on-site at the site of the building. The floor-ceiling panels are hung from the load bearing walls, utility walls are hung from the load bearing walls, and corridor panels are hung from the utility walls.