“Systems MillWork” – What it Means and Represents
David J. Cleasby, a veteran of commercial woodworking, introduces “Systems Millwork,” a transformative approach to casework design that blends modularity, standardization, and sustainability. Drawing on 45 years of experience, Cleasby advocates integrating his modular furniture systems into architectural practices via Building Information Modeling (BIM) and 3D modeling program (SketchUp). His goal is to streamline construction, enhance flexibility, and deliver long-term value to building owners, particularly in healthcare, education, and office settings.

From Hobby to Industry Pioneer
Cleasby’s journey began in Omaha, Nebraska in 1979, where he turned a woodworking hobby into a thriving business. Specializing in modular office furniture and casework, he served diverse sectors—hospitals, banks, schools, and offices—designing products that integrated technology and adapted to unique functional needs. In 2001, he sold his manufacturing operations but continued innovating, outsourcing production and adopting advanced 3D design tools. After rejoining an Architectural firm for a couple of years in 2007, he was challenged to reform their casework specification processes and proposed “Systems Millwork” as a solution.
What is Systems Millwork?
Systems Millwork redefines casework as a dynamic, modular system of pre-engineered components—cabinets, workstations, and storage units—designed for flexibility and efficiency. Unlike traditional casework, which is often static and custom-built, Systems Millwork offers:
Interchangeable Components: Bolted assemblies that can be reconfigured or relocated with minimal effort, enabling owners to adapt spaces as needs evolve.
Standardized Designs: Fewer cabinet sizes and universal components simplify inventory and renovations, ensuring consistency across facilities.
Construction Efficiency: Modular installations reduce floor penetrations, consolidate wiring, and speed up processes like carpet and wall finishing, cutting time and costs.
Sustainability: Optimized material use, recyclable components, and green products align with environmental goals.
BIM Integration: A library of “smart” components, with static (e.g., hinges) and variable (e.g., finishes) elements, embeds precise specifications into 3D models, enhancing design accuracy.

Bridging Design and Manufacturing
Cleasby highlights a disconnect between the woodworking industry and architectural design. While woodworking spans artisanal craftsmanship, traditional job shops, and high-tech panel processing, architectural specifications often rely on outdated AWI standards. Systems Millwork leverages precision manufacturing (e.g., 32mm metric systems) and software like Autodesk Inventor to create data-driven, modular solutions. By integrating these into 3D models, architects can design functional, adaptable spaces from the outset, reducing reliance on fabricator interpretations.
Implementation and Impact
Cleasby proposes more development of his extensive design library to new customers and pursuing marketing of the modular assembly or conventional processes being practiced. His modular nurse and reception stations, bank teller stations structures are designed as wire chase systems, exemplify the approach: they centralize wiring, simplify equipment upgrades, and allow relocation without disrupting finishes. Benefits include:
- Owners: Cost-effective modifications, durable components, and aesthetic consistency.
- Architects: Streamlined coordination, precise specifications, and creative freedom within standardized frameworks.
- Contractors: Faster, less invasive installations.
- Environment: Reduced waste and sustainable material choices.
Overcoming Resistance
Modular design has historically faced skepticism, perceived as flimsy or overly proprietary. Cleasby counters that properly engineered systems, using modern fasteners and precision manufacturing, overcome these concerns. He urges architects and designers to embrace BIM’s and 3D potential, moving beyond vague drawings and embracing detailed, flexible casework specifications. This shift, he argues, is essential to meet owners’ demands for adaptability in today’s fast-changing environments.

Conclusion
Systems Millwork is more than cabinetry—it’s a philosophy that prioritizes functionality, efficiency, and sustainability. By embedding modular, standardized components into commercial work spaces and design, Cleasby envisions a future where buildings are not just constructed but designed to evolve. His call to action challenges architects to rethink casework as a critical “spoke” in the design wheel, delivering spaces that are as adaptable as they are enduring.