Specification for Prefabricated Exterior Wall Panels of Houses
The specifications related to prefabricated exterior wall panels of houses mainly include the following:
1. Draft for Comments on Metal Tie Bars for Prefabricated Concrete Insulated Exterior Wall Panels This document is drafted by organizations such as China Academy of Building Research Co., Ltd. under the organization of the General Office of the Ministry of Housing and Urban-Rural Development. It mainly puts forward technical requirements for the metal tie bars used in prefabricated concrete insulated exterior wall panels. Metal tie bars are key components connecting the insulation layer and the concrete structure, and their performance directly affects the overall stability and durability of the exterior wall panels. The specification clarifies the material, mechanical properties, durability requirements, and test methods of the tie bars, and stipulates the technical standards for design, construction, and acceptance. Currently, this document is in the stage of soliciting comments, with the deadline for feedback being November 21, 2025, and it has not been officially released and implemented yet.
2. Technical Standard for the Application of Prefabricated Lightweight Concrete Exterior Wall Panels As a local standard in Guangdong Province (No. DBJ/T 15-266-2023), this standard was released on December 13, 2023, and implemented on June 1, 2024. Its core content covers the entire process of design, production, transportation, installation, and acceptance of prefabricated lightweight concrete exterior wall panels. The standard emphasizes the lightweight characteristics of the exterior wall panels (such as density and thickness requirements), stipulates material performance indicators (such as compressive strength and flexural bearing capacity), and puts forward detailed technical requirements for key parts such as connection joints and waterproof structures. In addition, the standard also clarifies the key points of quality control during the construction process, such as panel joint treatment and temporary support setting, to ensure the safety and applicability of the exterior wall panels.
3. Technical Specification for the Application of Prefabricated Concrete Sandwich Insulated Exterior Wall Panels This local standard in Beijing (No. DB11/T 2128-2023) was released on June 27, 2023, and implemented on October 1, 2023. This specification focuses on the application technology of prefabricated concrete sandwich insulated exterior wall panels, mainly regulating the structural design of the sandwich insulation layer (such as the type and thickness selection of insulation materials), the connection method between the inner and outer concrete panels (such as the layout spacing of tie bars), and the calculation method of thermal performance. The specification also puts forward specific requirements for the construction process, including the installation sequence of panel components, the treatment of connection joints, and protective measures for the insulation layer, and clarifies the acceptance standards, such as the detection methods for air tightness, water tightness, and wind pressure resistance, to ensure the building energy-saving effect and structural safety.
The above specifications provide technical bases for the design, production, construction, and acceptance of prefabricated exterior wall panels of houses from the perspectives of components, systems, and regional applications. The appropriate standard should be selected according to the project location and the type of exterior wall panels.
