House Renovation: Elevator Installation in Prefabricated Slab Buildings

Challenges exist in retrofitting elevators in old prefabricated slab brick-concrete buildings, but it is feasible with scientific design, construction, and reinforcement.

Structural Safety Hazards Require Attention

Prefabricated slab brick-concrete buildings inherently suffer from poor integrity and earthquake resistance. The prefabricated slabs are simply placed on the walls like puzzle pieces, lacking firm connections between them. In the event of an earthquake, the staircase walls are prone to collapse, and the prefabricated slabs are likely to fall off. When installing an elevator, especially with a half-floor access plan, walls and beams need to be chiseled and removed, further compromising the structural integrity. For example, removing the original window sill walls or even part of the ring beams in the staircase can weaken its stability. Moreover, the integration of new and old structures is challenging. The elevator shaft, when subjected to wind and seismic forces, is prone to deformation. If rigidly connected to the main body of the old building, it can increase the burden on the old structure. Although regulations require the installation of seismic joints, perfect implementation is difficult in actual construction. Additionally, fire safety hazards may arise, turning the staircase into a "dark room" that hinders evacuation during fires.

Scientific Design and Construction Are Key

Generally, with scientific design, construction, and targeted reinforcement measures, elevator installation will not significantly impact the structural safety of existing residential buildings. The design plan should clearly specify the modified parts and contents, ensuring that the additional loads comply with the original building's design standards and do not reduce its structural safety performance.

Standardized Procedures Ensure Safety

To ensure the safety of the entire elevator installation process, applicants should entrust qualified design, construction, and supervision units with the relevant tasks. Ground surveys and structural safety assessments of the building may be necessary. Elevator installation must comply with the "Special Equipment Safety Law" and relevant standards and safety technical specifications. Manufacturing and installation units must also possess the corresponding qualifications. After installation, the elevator must meet strict review conditions before being handed over to homeowners for use.