KNOT — modular chair system, studio render
Project 01 / 07 · BFA Capstone

KNOT.

Modular chair system
Walnut · Steel
Dec 2025 → May 2026
CCAD · Columbus, OH

Built to fix the joinery problem that keeps hybrid furniture production from scaling.

RoleIndustrial Designer · BFA Capstone, CCAD
TimelineDec 2025 (Research) → Spring 2026 (Design + Prototyping)
ToolsSolidWorks · KeyShot · GendoAI · 3D Printing
ContextSolo capstone; field research with Columbus-area furniture makers
$193B
US Furniture Market
Research across 4 market tiers — hybrid-custom is the underserved opportunity
4+
Columbus Makers Interviewed
A Carpenter's Son · Hazelwood Millworks · Columbus Furniture Co. · MRO Built
~5
Connector Strategies Tested
Dovetail-inspired bracket selected — strength, CNC compatibility, customization

Industry Research

Before designing anything, I spent a semester mapping the furniture industry. The US market is a $193B landscape broken into four tiers: Mass-Market, Mid-Market, Boutique Craft, and Hybrid Custom. Most furniture lives at the extremes — cheap and scalable, or handcrafted and expensive.

The hybrid-custom segment sits at roughly 10% of the market, but research showed it's the least served and sits at the sweet spot across five axes: Craftsmanship · Cost · Output · Customization · Sustainability.

Maker Interviews

I conducted site visits and interviews with Columbus-area furniture makers. The deepest case study was A Carpenter's Son Design Co. — a hybrid fabricator that started selling cutting boards as a fundraiser and grew into heirloom furniture.

Their workflow: Design Proposal → Fabrication (4 fabricators, 1 piece per maker) → Finishing (2 finishers on every piece) → Onsite Install. No automation, but technology used selectively to improve workflow without sacrificing craft.

  • Josh Scheutzow — Founder
  • Brad Hosfeld — Lead Designer
  • Cain Lackey — Shop Manager
  • Ellen Vail — Project Coordinator

The connector strategy didn't come from aesthetics — it came from understanding exactly where hybrid production breaks down.

Design Brief

The research surfaced a consistent theme: the thing that kills lead time in hybrid production isn't the woodworking — it's the joinery. Complex manual joints require skilled labor, slow fabrication, and can't be repeated on a CNC without losing the craft feel hybrid buyers pay for.

That became the design brief: a connection system that is strong, repeatable, tool-minimal, and CNC-compatible — without sacrificing the solid wood material that defines this market.

Insight → Requirement

Mapping each research insight to a hard design requirement.

Research Insight

Consumers value durability and longevity

Design Requirement

Use high-quality solid wood construction

Hybrid producers rely on repeatable, standardized components

Design around modular, interchangeable part systems

Labor-intensive fabrication limits scalability

Minimize complex manual joinery and assembly time

Flexible production enables customization at scale

Create configurable components with shared interfaces

Sustainability is a key purchase driver

Optimize for efficient material usage and repairability

Hybrid makers leverage digital fabrication

Ensure geometry is CNC / precision compatible

Iteration Matrix

I sketched across the full space of connection strategies before committing. Five made it to physical prototype. Each was handled, loaded, and assembled before moving on. The bracket won because it did something the others didn't: it was both the structural connector and the visual feature.

Strategy
Strategy
Strategy
Strategy
→ Selected
01
Mortise & Tenon
abandoned

Strong, but not versatile — locked into one configuration. Abandoned.

02
Vertical Interface
abandoned

Strong, but limiting — restricted seat/back combinations.

03
Peg & Socket
tested

Iterated for insertion force and fit tolerance. Promising, but bracket beat it on flexibility.

04
Sliding Connector
tested

Intuitive assembly. Promising direction, but less self-aligning than the dovetail geometry.

05
Dovetail Bracket
selected

Self-aligning, CNC-compatible, structural + visual. Selected — both connector AND feature.

Build Log

Eight weeks. Sketches → CAD → print → break → CAD → print → CNC. The full record below — the dead ends are as important as the breakthroughs.

01 Dec 2025

Industry mapping — four-tier framework

research reading

Mapped the US furniture market across Mass-Market, Mid-Market, Boutique Craft, Hybrid Custom. The hybrid-custom tier is the underserved opportunity — 10% of the market sitting at the sweet spot across craftsmanship, cost, output, customization, and sustainability.

Radar chart — Hybrid/Semi-Custom vs Boutique vs Mass-Market across five axes
02 Dec 2025

Maker interviews — A Carpenter's Son Design Co.

field 4 shops

Site visits with Josh Scheutzow, Brad Hosfeld, Cain Lackey, Ellen Vail. Their workflow: Design Proposal → Fabrication (4 makers, 1 piece each) → Finishing (2 finishers per piece) → Onsite Install. Joinery — not woodworking — is what kills lead time.

A Carpenter's Son Design Co. — shop floor, Columbus OH
03 Jan 2026

Connector ideation — exhaust the space

sketching ~30 concepts

Sketched across sliding interfaces, slide-and-lock mechanisms, compression concepts, interlocking geometries, mortise-and-tenon, finger joints, dovetail-inspired geometries, screw-in-place fasteners. The goal: don't pick early. Exhaust the option space first.

Connector ideation sketches — slide-lock, dovetail, peg-socket
04 Feb 2026

First rapid prototypes — PLA print farm

3D print fit tolerance

Printed early geometry for all five connector strategies. Mortise + tenon strong but rigid; vertical interface restrictive; peg/socket workable but no self-alignment.

First print run
05 Mar 2026

Selected: dovetail-inspired bracket

selected milestone

The bracket won because it did something the others didn't: it was both structural connector AND visual feature. CNC-compatible, no manual joinery, self-aligning. Two brackets per chair: seat-to-frame, backrest-to-frame. Any seat pairs with any backrest.

Refined bracket
06 Mar 2026

SolidWorks geometry — CNC validation

CAD tool path

Bracket profile drawn in SolidWorks. Geometry checked against CNC end-mill diameters and step-down tolerances. Slot width iterated 3× — final spec lands at .250" with a .003" interference fit.

Dovetail bracket fitted into wood joint
07 Apr 2026 — now

KeyShot renders + walnut prototype

in shop walnut

Currently in shop: full chair walnut prototype, brackets cut on the school CNC. KeyShot configuration renders for the modular system — dining, lounge, task, barstool — all the same bracket.

Full-scale wood chair prototype in the shop
Sliding rack connector prototype

Sliding rack — intuitive assembly, less self-aligning

Compact peg connector prototype

Compact peg variant — workable fit, no self-alignment

Angled base connector prototype

Angled base variant — tested insertion force and tolerance

Full connector iteration spread

Full iteration spread — all five strategies printed and handled

The Connector

The dovetail-inspired bracket is the system's core. It self-aligns during assembly, requires no complex manual joinery, and is fully CNC-compatible for repeatable hybrid production. Each chair uses two brackets — one connecting the seat to the frame, one connecting the backrest — giving the system its modularity: any seat pairs with any backrest.

Chair system disassembled — modular components and flat-pack boxes

Modular system disassembled — three components, two brackets, one flat box

Assembly

Frame → brackets → seat → backrest. The shared interface means components can be swapped, reconfigured, or replaced independently — without disassembling the whole system.

Assembling the chair in the workshop

Assembly in the shop — tool-minimal, for fabricators and end users alike

Sliding the seat panel into the bracket track

Seat slides into the bracket track — no alignment guesswork

Configurations

Because every component shares the same connector interface, the system produces a genuine range — not just colorways, but structurally different configurations. Dining, lounge, task, barstool. Walnut, oak, ash, painted. The bracket is the constant. Everything else is a variable.

Four chair configurations — dining, lounge, task, barstool — shared bracket

Unlimited configurations from one connector — shared bracket, different components

Flat-Pack

The same modularity that enables configurations also enables flat shipping. Components nest flat in a compact box — reduced volume, reduced damage risk, reduced cost. The design criteria built this in from day one. It wasn't a feature added at the end.

All components packed flat in one compact box

Ships flat — all components in one compact box

Components unboxed — ready to assemble or move

Move, reassemble, reconfigure — the same system that ships flat moves with you

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