Choosing the Right Modular Construction Method: Volumetric vs Panelized

This article explores modular construction, specifically the differences between volumetric and panelized approaches, catering to the needs of both developers and manufacturers.

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Understanding Modular Construction

Modular construction revolutionizes building practices by prefabricating components off-site in controlled factory settings. This method ensures efficiency, cost-effectiveness, and stringent quality control, surpassing traditional construction methods.

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Volumetric Construction:

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Complete Modules

Volumetric construction involves producing fully finished three-dimensional modules or pods off-site. These modules include everything from electrical, plumbing, interior finishes to fixtures, offering a complete solution.

 

Transportation and Installation

These modules are transported to the construction site and assembled into the final structure, ensuring a swift and efficient construction process.

 

Speed and Efficiency

Volumetric construction is renowned for its rapid pace, where multiple modules are simultaneously manufactured in the factory, with larger, more comprehensive sections of a building being constructed off-site. This method minimizes on-site trades, accelerates assembly, and boosts cost savings.

 

Design Constraints

Despite its efficiency, volumetric construction may present design limitations due to transportation and lifting considerations.

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Panelized Construction:

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Component Panels

Panelized construction involves fabricating individual building components or panels off-site. These panels, such as walls, floors, and roofs, are typically not fully finished, allowing for flexibility during on-site assembly.

 

Transportation and On-Site Assembly

Panels are transported to the construction site and pieced together to form the final structure. On-site work involves connecting and finishing the assembled panels.

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Flexibility and Customization

Panelized construction offers greater design flexibility and customization options, adapting well to diverse project requirements. The assembly process involves connecting panels to achieve the complete building.

 

Less Transportation Complexity

Transporting panels is generally less complex than volumetric units, as panels can be stacked for efficient logistics.

 

Key Differences: Volumetric vs Panelized

 

Project ​Complexity

Volumetric construction suits projects with straightforward, repetitive designs, producing comprehensive modules off-site that include interior finishes. It is also favored for remote locations where transporting trades is costly. Panelized construction, on the other hand, supports greater design complexity by fabricating individual panels or sections that require on-site assembly and finishing.

 

Transportation Logistics

Choosing between volumetric and panelized methods hinges on transportation logistics and lifting capabilities. Volumetric modules are transported as larger, self-contained units, while panelized components are shipped as individual panels or smaller assemblies, potentially necessitating more components on-site.

 

On-Site Customization

For projects prioritizing on-site customization and adaptability, panelized construction is often preferred.

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Summary

The decision between volumetric and panelized modular construction depends on project-specific factors. Developers and manufacturers must align their strategies with the project's requirements, design complexity, site conditions, transportation logistics, timelines, and market trends. An alternative strategy is to integrate both volumetric and panelized approaches. For example, constructing a bathroom as a complete unit off-site (volumetric) and incorporating it into a structure assembled with pre-made panels (panelized) can be an optimal solution. By comprehending the differences between volumetric and panelized construction, stakeholders can make informed choices that improve efficiency, cost-effectiveness, and design flexibility.