Developed countries began innovating and researching building walls as early as the 1940s and 1950s. They transitioned from using small materials like sintered standard bricks to large wall components, and then advanced to lightweight composite panels—moving toward prefabricated building walls. With the rise of construction industrialization, developed nations worldwide have come to view factory prefabrication and assembly of building components as key symbols of modernization in the construction industry.
Advantages of Prefabricated Enclosure Structures:
From a materials perspective, decorative concrete and its products offer excellent performance and durability. Technologically, they can be cast in place or prefabricated, with mature and well-established methods. In terms of specifications, large-scale, multi-surface, and mold production is achievable. Texturally, these materials can mimic various effects such as metal or wood. Additionally, almost any color—including gold and silver—can be reproduced.
About Shanghai Jundao Residential Industry Co., Ltd
Jundaozhugong is a service-oriented technology group with comprehensive capabilities in research and development, professional design, cluster production, and information management. They are dedicated to providing customers with full EPCM services, including prefabricated building project management, specialized design, component production and procurement, lifting consulting, and integrated prefabricated interior decoration. Recently, Jundao Zhugong collaborated with Tongji University and Xi’an Jiaotong Liverpool University to develop an integrated exterior wall system combining prefabricated technology, green energy-saving solutions, and personalized design technology. Today, we invite you to explore this groundbreaking system!
The Jundao Zhugong JSC Lightweight Prefabricated Exterior Wall System (“JSC Exterior Wall”) is an integrated exterior wall solution that combines assembly technology, green energy-saving techniques, and personalized design. It features a lightweight prefabricated enclosure system composed of a light steel frame, ultra-high-performance concrete panels on both exterior and interior surfaces, and insulation filling. This system seamlessly integrates multiple functions—such as doors and windows, waterproofing, insulation, and exterior decoration—and includes an efficient anti-pollution, self-cleaning capability.
Using the Shaoxing Seaside Hotel as a case study, we will share the technical innovations and applications involved in this project.
1. Project Overview
The hotel project employs a prefabricated steel structure and involves prefabricated building manufacturers during the design phase to provide technical support. This approach ensures integrated design and construction strategies for prefabricated buildings. Utilizing BIM technology and considering the production characteristics of prefabricated components, the design simplifies the variety of external wall panels and connection nodes—especially regarding the project’s peripheral protection system—while meeting all design requirements. This simplification facilitates construction and significantly reduces project costs.
Project Details:
- Project Name: Zhejiang Shaoxing Seaside Hotel
- Location: Shunyuan Road, Changhai Highway, Shangyu District, Shaoxing City
- Timeline: Started May 2017; wall panel construction and completion from August to December 2017
- Developer: Zhejiang Shaoxing Binhai Xinzuo Hotel Management Co., Ltd
- Design Firm: Zhejiang Southeast Architectural Design Co., Ltd
- Construction Company: Zhejiang Yongsheng Construction Co., Ltd
- Component Manufacturer: Shanghai Jundao Residential Industry Co., Ltd
- Structural System: Prefabricated light steel structure with decorative insulation exterior wall system
- Building Area: 12,900 square meters (11,800 above ground, 1,100 underground)
- Total Height: 30 meters
- Floors: 9 floors, prefabricated assembly type
- Total Investment: Approximately 60 million RMB
2. Project Technology Applications
The floor slabs use cast-in-place reinforced concrete, indoor partition walls are built on-site with aerated bricks, and the exterior walls consist of prefabricated light steel concrete composite panels.
Key Technical Features:
· Steel Structure as Main Framework
The project prioritizes environmentally friendly and efficient steel structural systems. The design employs bolted connection nodes, which provide fast installation and quality control. The steel structure integrates harmoniously with the enclosure system, typically combining steel columns with external wall panels.
· BIM-Based Information Management Platform
From the design phase, BIM technology fully coordinates the technical team across architecture, structure, plumbing, and electrical disciplines. Secondary development based on the BIM model links prefabricated component material lists with supplier information, facilitating on-site installation and component tracking. A QR code management system enables quick, accurate access to component parameters, reducing errors and boosting installation efficiency.
· Prefabricated Dry Decoration According to Policies and Standards
This innovative decoration approach uses dry construction methods, producing components in the factory and assembling them on-site by professional workers. This ensures high quality, fast installation, and no pollution. The project employs an integrated exterior wall that merges decoration and structure, complemented by integrated bathroom and ceiling technologies indoors. This approach delivers superior quality and appearance compared to traditional methods, with controllable costs.
· One-Piece Prefabricated Exterior Walls and Window Frames
Jundao Zhugong’s system forms exterior walls and window frames as a single unit, completely resolving issues like window leakage. By shifting most wet work to factory production, site disturbance is minimized, benefiting environmental protection. The board materials are eco-friendly, factory-processed, and strictly tested to guarantee quality for both interior and exterior use.
· Jundao Mechanical Anchor Bolt Shear Capacity Calculation Software
Based on exterior wall characteristics and site requirements, Jundao Zhugong independently developed the “Jundao Mechanical Anchor Bolt Resistance Shear Bearing Capacity Calculation Software.” This tool improves drawing efficiency and quality for designers, supports material statistics for budgeting, and provides a calculation basis for transportation safety. By inputting necessary parameters, the software calculates the shear bearing capacity of mechanical anchor bolts and automatically generates calculation sheets, enhancing design accuracy and reliability.
3. Project Innovation Highlights
Currently, construction industrialization mainly uses concrete exterior wall panels in peripheral protection systems paired with frame structures (concrete or steel). However, solid concrete panels are heavy and challenging to use extensively.
In East China, concrete sandwich panels are common, but their weight (over 300kg/m²) increases the main structure’s steel requirements and raises safety concerns for prefabricated structures heavier than curtain walls. Moreover, these panels often suffer from limited exterior decoration options and issues like thermal bridging and condensation.
To address the need for lightweight, high-strength, and customizable designs, Jundao Zhugong developed a high-performance integrated light steel structure exterior wall system. This system perfectly balances structural strength, insulation, soundproofing, fire resistance, and waterproofing, while showcasing the building’s facade aesthetics.
Integrated Light Steel Structure Exterior Wall System
The system includes a 5cm thick plain concrete exterior finish, exterior walls, a light steel frame (with insulation), and interior walls. Designers can choose the external facing based on project requirements. Foam concrete insulation fills the light steel skeleton, while the inner wall features steel mesh and anti-crack cement mortar. The system attaches to the main structure via hanging connections: the lower end bears loads, and the upper end mainly serves as fixation. Connection nodes comprise hangers embedded in wall panels linked to light steel, and supports welded to the main structural panels.
Eight core technologies define this exterior wall system, characterized by:
- Lightweight: The exterior wall weighs only 200 kg/m²—nearly 40% lighter than traditional walls.
- High Strength: Fiber-reinforced high-strength concrete panels exhibit superior flexural strength, enabling them to withstand higher wind and seismic loads safely.
- Customization: Exterior finishes use reverse printing techniques to replicate various common hard finishing materials, allowing for diverse decorative effects.
- Excellent Thermal Insulation: The thermal insulation bolt light steel frame serves as the main structural support, connected via horizontal and vertical steel members around wall panels and window openings. A 1 cm gap between the steel components and outer concrete layer helps transfer loads effectively through insulated bolts meeting anchoring standards.
- Integration: The system fully integrates exterior decoration, structural framework, insulation, interior finishes, windows, and other enclosure elements, achieving complete cohesion.
Seamless Integration of JSC Exterior Wall and Interior Systems
Jundao Zhugong’s JSC lightweight exterior wall system flexibly integrates with the building’s main structure and collaborates with Jundao’s robust interior design system. This allows for a cohesive combination of the exterior enclosure with initial interior decoration, optimizing overall design efficiency.
Interior design must align with the project’s future business needs. Early in the project, significant space is reserved for further customization. After tailoring the external enclosure, the integrated Jundao interior system reserves multi-dimensional space, enabling more user-friendly and adaptable design.
Jundao’s interior decoration system, built on innovative methods and high-tech one-stop solutions, offers 100% prefabricated interiors. This results in greener, more environmentally friendly living spaces, with precise and shorter construction periods compared to traditional methods, convenient dry construction, and easier future maintenance.
Jundao’s independently developed JSC exterior wall system meets technical requirements for various main structures. Architects can customize attractive “building outerwear,” produced in factories, hoisted on-site as finished products, and tracked via QR codes throughout production—ensuring quality assurance.
The exterior and interior systems are seamlessly integrated with coordinated plans. The interior design can accommodate mechanical, electrical, piping, and equipment systems without being constrained by structural or exterior enclosure limitations. This freedom enables designers to preserve their initial creative inspiration without compromise.
Jundao Zhugong aims to become a comprehensive service provider across the construction industry chain, striving to simplify construction, enhance building aesthetics, and improve quality of life.
Intelligent Technology Design in the Jundao JSC System
Jundao Zhugong has introduced a smart home living solution for the information age. By integrating smart panel control systems through wired and wireless connections, it creates an ecological, intelligent living experience.
The Jundao smart home system prioritizes safety, health, convenience, and energy efficiency. The JSC exterior wall can be equipped with a wind and rain sensing three-leaf system that automatically opens and closes windows and adjusts fresh air circulation based on weather conditions—offering a truly intelligent and satisfying living environment.
Must log in before commenting!
Sign Up