Common Residential Project

Main Structural Frame

The predominant joinery system for constructing both detached and semi-detached wooden frame houses is the post-and-beam method known as ‘Zairai.’ In the contemporary Japanese market, this technique is largely executed through a fully automated machine-cut process, accounting for approximately 90% of annual projects. Our state-of-the-art precut machinery fabricates essential structural elements, including main frames, sub-frames, and components for roofs and floors. To optimize project costs, our advanced CAD/CAM technology significantly reduces lead times and minimizes material waste. The Japanese post-and-beam frame features two joint systems: traditional wood crafting joints and modern metal-fastener joints. We supply a comprehensive range of components, including columns, sills, horizontal beams (girts and summers), purlins, and braces, ensuring robust and efficient construction solutions.

Wood Crafting Joint

Vertical posts (columns) and horizontal beams with diagonal bracing compose the main structure. Post and beams are joined by a crafted joint e.g. tenon, motise, and dovetail etc.
The origin of the method goes back to the eighth century and it was used for famous shrines such as Ise and Izumo, for instance.

Reference for crafted component

Pin-connected ( Metal-fastened ) Joint

The pin-connected joint represents a contemporary alternative to traditional woodworking joints, employing an innovative post-and-beam approach. This method utilizes single or dual hanger plates, metal tubes, and drift pins, distinguishing it from the Zairai technique. By integrating Glulam with certified metal fittings, the structural integrity of constructions can be precisely calculated, enhancing reliability.

In light of Japan's heightened focus on earthquake-resistant architecture, this building method has gained significant traction among homebuyers seeking safety and durability. The pin-connected joint not only meets modern engineering standards but also addresses the pressing need for resilience in seismic-prone regions. As a result, its popularity continues to soar in today’s market, appealing to those who prioritize both aesthetics and structural soundness in their homes.

Perspective sectional drawings

In the realm of construction, certified metal fasteners that have successfully passed rigorous testing standards are essential for any building project. We proudly offer a diverse selection of connectors, complete with pre-cut frames, including renowned brands such as Mokken, HSZ, Cretech, Tech One, KES, and Presetter. Among our extensive inventory, three connector types stand out as favorites among our clients, thanks to their reliability and performance. These trusted solutions not only enhance structural integrity but also streamline the assembly process, ensuring that your projects are completed efficiently and to the highest standards. At our company, we are committed to providing top-quality fastening solutions that meet the demands of modern construction.

 Popular type of connector

Hagara’ Sub-frame component

We offer a diverse range of sub-structural frames known as ‘Hagarazai,’ which serve as our standard components. Our selection includes essential elements such as hip, valley, and fly rafters, ladders, fascias, studs, floor joists, window sills, and trim. We provide both domestic and imported softwood species to meet your project needs.

One of the key advantages of our pre-cut panels is the significant reduction in on-site labor. By eliminating the need for measuring and cutting rafters on-site, we enhance safety and efficiency during the construction process. This proactive approach not only fosters a safer work environment but also contributes to a reduction in lead times, ensuring your project stays on schedule. Trust us to deliver quality components that streamline your building experience.

Reference for crafted component

Structural panel component

Our product range features two essential components: sub-roofing panels and sub-flooring panels. Crafted from high-quality structural plywood, these panels significantly enhance a building's resilience against lateral forces, such as those generated by earthquakes and strong winds. By incorporating our sub-roofing and sub-flooring solutions, you not only improve the overall stiffness of your structure but also ensure greater safety and durability. These innovative materials are designed to meet the rigorous demands of modern construction, providing a robust foundation and roof that can withstand nature's challenges. Elevate your building's performance and longevity with our expertly engineered plywood panels, engineered for excellence in every application.

Reference for crafted component