Prefabricated Wall Panels for Multi-Story Building Construction
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Solution Overview
Problem
Conventional construction methods for high-rise and multi-story buildings face challenges with modular construction due to weight and transportation issues, making it costly and time-intensive, and are not adapted for building such structures efficiently.
Innovation Solution
A construction system using premanufactured, preassembled, and prefinished components, including non-weight bearing walls, interior, and exterior components, which are standardized and manufactured in a facility, transported to the site, and assembled quickly to form energy-efficient buildings with minimal on-site finishing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If manufactured housing modules are used for multi-story construction, then construction can be carried out year-round in controlled environments, but weight and craning issues make handling extremely difficult and cost-prohibitive
Solution Approach 1:
The building is divided into two distinct systems: a premanufactured non-load-bearing wall system (manufactured in controlled factory environments) and a load-bearing structural system (constructed on-site). This segmentation allows the heavy structural components to remain on-site while only the lighter wall panels are transported and assembled, resolving the weight and handling issues of traditional modular construction.
Solution Approach 2:
The load-bearing structural function is extracted from the manufactured modules and placed entirely on-site. The factory-manufactured components only provide non-structural enclosure functions, eliminating the need to transport and crane heavy structural modules while retaining the benefits of controlled-environment manufacturing for the wall panels.
2Productivity
If large modules are manufactured and transported to construction sites, then assembly line efficiency is achieved, but transportation issues arise due to weight and space constraints limiting trucks to one or two modules
Solution Approach 1:
The building envelope is segmented into smaller, non-structural wall panels that can be efficiently manufactured in batches at the factory and transported in larger quantities per truckload. These panels are then rapidly assembled on-site to cover the entire building surface, maintaining assembly line productivity while improving transportation efficiency.
3Adaptability or versatility
If conventional on-site construction is used for high-rise buildings, then flexibility and adaptability are maintained, but construction time and labor intensity increase significantly
Solution Approach 1:
The non-load-bearing wall panels are premanufactured in controlled factory environments before the building structure is even erected on-site. This preliminary action allows parallel processing: while the structural framework is being constructed on-site, the wall panels are being manufactured off-site, significantly reducing overall construction time while maintaining design flexibility.
Solution Approach 2:
By separating the structural and envelope systems, the project allows simultaneous construction activities: structural work on-site and envelope manufacturing off-site. This segmentation enables overlapping schedules and reduces the critical path duration while preserving the ability to adapt design changes in the non-structural components.
4Productivity
If manufactured housing techniques are used, then labor productivity increases with less skilled labor under supervision, but quality monitoring and weather protection during assembly become challenges
Solution Approach 1:
All wall panels are premanufactured in controlled factory environments where quality can be closely monitored and maintained. The panels arrive at the site ready for installation, transferring quality control to the manufacturing phase where environmental controls ensure consistent production standards regardless of weather conditions.
Solution Approach 2:
The separation of structural and non-structural systems allows different quality control approaches: the structural system receives on-site inspection and verification, while the manufactured wall panels receive factory quality assurance. This segmentation enables specialized quality processes for each system type.
Data Source
AI summary
Examples of construction systems and methods of constructing multi-story buildings utilizing premanufactured and prefinished components are disclosed. Examples of premanufactured and prefinished components include floor and ceiling slabs, non-weight bearing window walls, demising walls, exterior walls, and utility walls. The premanufactured and prefinished components may be transported to the construction site and assembled at the construction site.