Introduction

Welcome to 3Cycle, an open-source modular timber construction system designed for flexibility, sustainability, and precision.

What is 3Cycle?

3Cycle is a comprehensive system of standardized components that work together to create efficient, modular building structures. Developed in Estonia, it combines decades of construction expertise with modern manufacturing techniques to deliver a scalable, sustainable approach to building.

The system is designed for:

• Architects - Complete freedom to design with standardized building blocks
• Builders - Efficient assembly with precision-manufactured components
• Developers - Open documentation and specifications for implementation

Core Principles

Standardization

All components follow consistent design rules and manufacturing standards. This ensures:

• Dimensional coordination - Standard sizing grids across all components
• Connection compatibility - Universal joining methods throughout the system
• Predictable performance - Consistent material specifications and tolerances

Modularity

Components are designed for flexible combination:

• Mix and match components to suit project requirements
• Reconfigure assemblies as needs change
• Upgrade or replace individual components independently

Sustainability

Built with environmental responsibility:

• Timber-based construction with sustainable sourcing
• Long-term durability reduces environmental impact
• Open-source documentation minimizes waste through precision

System Components

3Cycle is built from three main component categories:

1. Structural Components - Load-bearing modules and connections
2. Enclosure Components - Walls, insulation, and opening systems
3. Service Components - Utility integration and access points

Each category works together to create complete, functional buildings from standardized, interchangeable parts.

Getting Started

Explore the documentation to learn more about designing and implementing 3Cycle structures.