タツミ List of Products and Services

"LB" is a pipe-type independent low column foot hardware that accommodates various column sizes. Due to the low height of the double base section at 55mm, the hardware can easily be concealed below the finished floor surface. Using M12 anchor bolts, the loose hole for the anchor bolts can accommodate ±6mm. Additionally, by changing the column receiving parts, it can accommodate square columns from 90mm to 300mm and flat columns as well. 【Features】 ■ The low height of the double base section at 55mm allows the hardware to be easily concealed below the finished floor surface. ■ Uses M12 anchor bolts, with loose holes for anchor bolts accommodating ±6mm. ■ By changing the column receiving parts, it can accommodate square columns from 90mm to 300mm and flat columns. *For more details, please refer to the PDF document or feel free to contact us.

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"Deco-tube" is a decorative hardware used for the base of independent columns. With a simple and beautiful design, it can be used in conjunction with HDC III-S105/L105, allowing for the short-term standard load capacity (tension, compression) of HDC III to be utilized. Additionally, the processing of the column material joint is the same as that of HDC III. We offer a rich variety of colors, including semi-gloss white, red, blue, brown, and special patterned finishes. 【Features】 ■ Limited to use in conjunction with HDC III-S105/L105 ■ Used for the base of independent columns ■ Simple and beautiful design ■ Processing of the column material joint is the same as that of HDC III ■ Made to order, delivery time: approximately 2 to 3 weeks *For more details, please refer to the PDF document or feel free to contact us.

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Here is an introduction to a case study of an elementary school constructed in Ibaraki Prefecture. Using the Tech One series, it was completed in 2015. The total floor area is 9,145.55 m², and the span is less than 8 m. You can view the detailed information about the case study through the related link, so please take a look. 【Case Overview】 ■ Span: Less than 8 m ■ Fire Resistance: None ■ Year of Completion: 2015 ■ Construction Location: Ibaraki Prefecture ■ Total Floor Area: 9,145.55 m² ■ Materials Used: Tech One Series *For more details, please refer to the PDF document or feel free to contact us.

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Here is an introduction to a case study of a nursery school constructed in Nagano Prefecture. The hardware used is the Tech One series. The span is 11 to 13 meters, and the total floor area is 1580.09 m². You can view the detailed information about the case study through the related links, so please take a look. 【Case Overview】 ■ Span: 11 to 13 m ■ Fire resistance: None ■ Year of completion: 2015 ■ Construction location: Nagano Prefecture ■ Total floor area: 1580.09 m² ■ Hardware used: Tech One series *For more details, please refer to the PDF materials or feel free to contact us.

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Here is an introduction to a case study of a facility for disabled workers constructed in Tainai City, Niigata Prefecture. Tech One was used for both fabricated hardware and conventional hardware. This project focused on how to aesthetically incorporate the visible hardware, particularly in exposed areas. You can view detailed information about the case through the related links, so please take a look. 【Case Overview】 ■ Span: 8–10m ■ Fire Resistance: None ■ Completion Year: 2018 ■ Construction Location: Tainai City, Niigata Prefecture ■ Total Floor Area: 908.40m² ■ Hardware Used: Tech One Series *For more details, please refer to the PDF document or feel free to contact us.

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Here is an introduction to a case study of the elementary school gymnasium constructed in Obama City, Fukui Prefecture. The roof and truss upper chord materials were pre-cut construction. The lower chord materials and diagonal members were steel frame construction. We faced challenges in adjustments from the construction drawing review to the assembly, but the joy of successfully reaching the topping out with the cooperation of both the pre-cut construction and rebar work was special. You can view the detailed content of the case study through the related links, so please take a look. 【Case Overview】 ■ Span: Over 16m ■ Fire Resistance: None ■ Completion Year: 2017 ■ Construction Location: Obama City, Fukui Prefecture ■ Total Floor Area: 1083.32m2 ■ Used Hardware: Custom-made hardware *For more details, please refer to the PDF materials or feel free to contact us.

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Here is a case study of the construction of the Urakan Nursery in Sanjo City, Niigata Prefecture. Due to the construction starting in December, progress was slow because of snow and other weather conditions. There were many fabricated metal components, making the creation of construction drawings for fittings an important aspect, and we efficiently processed the wood materials. You can view the detailed information about the case through the related links, so please take a look. 【Case Overview】 ■ Span: 11–13m ■ Fire resistance: None ■ Year of completion: 2018 ■ Location: Sanjo City, Niigata Prefecture ■ Total floor area: 957.00m² ■ Used hardware: Tech One series / Custom hardware *For more details, please refer to the PDF document or feel free to contact us.

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Here is an example of a fruit shop constructed in Sendai City, Miyagi Prefecture. The project features exposed materials, including columns, beams, wooden braces, round steel braces, and a skylight, as well as diagonal and horizontal braces made from specially processed components, showcasing the structural design. You can view more details about the case through the related links, so please take a look. 【Case Overview】 ■ Span: Less than 8m ■ Fire Resistance: None ■ Completion Year: 2018 ■ Construction Location: Sendai City, Miyagi Prefecture ■ Total Floor Area: 460.41m² ■ Hardware Used: Tech One Series *For more details, please refer to the PDF materials or feel free to contact us.

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Here is an introduction to a residential construction project in Yamagata City, Yamagata Prefecture. The roof shape is unique, and the entire second floor extends significantly. We used custom-made metal fittings at key structural points. You can view the detailed information about the project through the related links, so please take a look. 【Project Overview】 ■ Span: Less than 8m ■ Fire resistance: None ■ Completion year: 2018 ■ Construction location: Yamagata City, Yamagata Prefecture ■ Total floor area: 105.34m2 ■ Fittings used: Tech One series / Custom fittings *For more details, please refer to the PDF document or feel free to contact us.

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Here is a case study of the community center constructed in Oguni, Nagaoka City, Niigata Prefecture. It is a building resembling a framed structure with braces. The combined beam with two materials and the braces were assembled in the factory using structural screws and adhesives, and then transported to the site where the tension materials and the two-material beams were assembled on-site. You can view the detailed content of the case study through the related links, so please take a look. 【Case Overview】 ■ Span: 8–10m ■ Fire Resistance: None ■ Year of Completion: 2018 ■ Construction Location: Oguni, Nagaoka City, Niigata Prefecture ■ Total Floor Area: 516.79m² ■ Hardware Used: Tech One Series *For more details, please refer to the PDF document or feel free to contact us.

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Here is an introduction to a case study of the tourist information center constructed in Myoko City, Niigata Prefecture. The beam structure features a central post with radiating rafters arranged around it. It involves many special processes, and the construction method was carefully devised. You can view the detailed content of the case study through the related links, so please take a look. 【Case Overview】 ■ Span: Less than 8m ■ Fire Resistance: None ■ Completion Year: 2018 ■ Construction Location: Myoko City, Niigata Prefecture ■ Total Floor Area: 319.44m2 ■ Hardware Used: Tech One Series / Custom Hardware *For more details, please refer to the PDF document or feel free to contact us.

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Here is a case study of an office constructed in Gyoda City, Saitama Prefecture. The two-story office building with an 11m span was realized using only residential materials. Although it is relatively large for a wooden office building, the first floor is designed with small rooms to limit the span of the floor beams, allowing for a spacious area on the second floor. This reasonable structural planning made it possible to use residential-sized structural materials throughout. The second floor features a large space measuring 10.92m x 24.57m. You can view more details about the case through the related links, so please take a look. 【Case Overview】 ■ Span: 8–10m ■ Fire Resistance: None ■ Completion Year: 2014 ■ Location: Gyoda City, Saitama Prefecture ■ Total Floor Area: 660m2 ■ Hardware Used: Tech One Series / Tech One P3 Plus *For more details, please refer to the PDF materials or feel free to contact us.

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The "fire brace hardware" is a reinforcement hardware that can form horizontal structural planes as an alternative to fire bracing materials. The floor amplification (allowable shear strength) of the horizontal structural plane is evaluated based on the size of the compartment. It is mainly used to enhance design aesthetics and ensure natural lighting by eliminating fire bracing in open spaces, and can also be utilized in areas where forming horizontal structural planes is difficult, such as staircases and second-floor bathrooms. 【Features】 ■ Can be used in areas where forming horizontal structural planes is difficult ■ Evaluates the floor amplification (allowable shear strength) of the horizontal structural plane based on the size of the compartment ■ Simple installation by placing the hardware at "2 corners" or "4 corners" depending on the size of the applicable structural compartment, and attaching it with dedicated screws ■ It is also possible to use it in conjunction with fire bracing or structural plywood as specified in the Ministry of Land, Infrastructure, Transport and Tourism Notification No. 1347 of 2001 *For more details, please refer to the PDF materials or feel free to contact us.

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This catalog is the product catalog of Tatsumi Co., Ltd., which manufactures wooden house connection hardware and structural components, as well as OEM production at the request of major housing material manufacturers. In response to the need for improved structural strength for earthquake resistance, and the increased processing capabilities required for building hardware, we are creating products that meet these demands with new equipment. [Contents (excerpt)] ■ Connection hardware / Tech One ■ Tech One P3 Plus ■ Custom hardware ■ Control brace / Gota ■ Reinforcement hardware *For more details, please refer to the PDF document or feel free to contact us.

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"Tech One TCW" is a joining hardware that achieves higher strength while being compact. By maximizing the know-how of Nippon Steel Corporation's steel house, we have developed a new hardware that is more compact and has improved load-bearing capacity compared to the conventional Tech One, enabling its application to a wider range of wooden structures. By thinning the wing parts, we have optimized the critical and excess areas at the joints, and through a special riveting technique, we have made it possible to enhance the strength and compactness of the hardware simultaneously by joining two pieces of hardware together. 【Features】 - A strong framework can be achieved with a simple combination of bolts and drift pins. - By reducing the projection compared to Tech One P3 and thinning the plate, we have achieved a weight reduction of up to 40%. - By overlapping L-shaped hardware at the bolt connection surface, we have optimized the plate thickness and achieved high strength. *For more details, please refer to the PDF materials or feel free to contact us.

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The "Tech One P3 Plus" is a construction hardware designed to reinforce the weaknesses of wooden houses. After the spread of high airtightness and high insulation houses and revisions to building codes, it became mainstream in residential construction following the Great Hanshin-Awaji Earthquake. This seismic processing technology is suitable for modern living environments and is widely used not only in general housing but also in medium to large-scale buildings such as hospitals, daycare centers, and other commercial facilities. 【Features】 ■ Achieves a large span of 12m using inexpensive residential wood (under 6m) ■ Truss structure that efficiently utilizes the strength of wood ■ Unique two-piece concept ■ Allows for flexible framing due to adjustable angles ■ Enables free design through structural calculations (compatible with various framing types, spans, and floor heights) *For more details, please refer to the PDF materials or feel free to contact us.

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The "BRS Method" is a welded assembly rebar system that connects the main bars without hooks at the ends of the bracing bars through welding. This method can be used for the reinforcement of cast-in-place reinforced concrete foundations, including slab foundations and eccentric slab foundations, in residential buildings with three or fewer stories, as well as in multi-family housing (traditional frame construction, framed wall construction, and steel structures). 【Features】 - No hooks at the ends of the bracing bars - Welded assembly rebar system that connects the main bars through welding - Single reinforcement unit *For more details, please refer to the PDF materials or feel free to contact us.

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The "Tech One P3" is a joining hardware that adds precision and robustness to traditional frame construction methods. We have successfully established a simple and rational construction system to enable safer and higher-level construction. The feedback from our customers stating that they "feel it during the assembly process" is our pride and a testament to our reliability. 【Features】 ■ A strong framework can be achieved with a simple combination of bolts and drift pins. ■ The corners are rounded for safety considerations. ■ By processing the bending of the back plate with an R treatment, we reduce deformation of the hardware caused by over-tightening bolts. ■ The hardware protrusion is compact at 100mm. *For more details, please refer to the PDF document or feel free to contact us.

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Our company is focusing on the production of custom metal fittings for wooden non-residential buildings, which have seen an increase in demand in recent years. With the growing demand for hybrid structures combining steel and wood, as well as medium to large-scale wooden buildings, the fittings for joints are also becoming larger, leading us to produce custom items tailored to specific projects. Utilizing fiber laser processing machines, machining equipment, and welding machines, we handle all manufacturing in-house, from creating the design drawings for the fittings to production, plating, and specified inspections. By maximizing our long-developed metal processing technology and know-how as a precut factory, we are able to produce high-quality products at low costs. 【Features】 ■ The fittings for joints are becoming larger, and we conduct custom production tailored to specific projects. ■ All manufacturing is done in-house using fiber laser processing machines, machining equipment, and welding machines. ■ We handle everything from creating design drawings for fittings to production, plating, and specified inspections. ■ We maximize our long-developed metal processing technology and know-how as a precut factory. *For more details, please refer to the PDF document or feel free to contact us.

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We handle "Z-mark labeled hardware/C-mark labeled hardware." These are used for connecting the foundation or base to the columns, as well as for the connection between columns on different floors, including the Z-mark labeled hardware "HD-B" and others like "S-HD." Additionally, we offer C-mark labeled hardware "PC," which can also be used for connecting columns and beams, as well as "TS/TW," which is used for connecting rafters and trusses, and for securing upper frames. 【Z-mark labeled hardware lineup (partial)】 ■ Hold-down hardware (pulling hardware) HD-B ■ Hold-down hardware (pulling hardware) HD-N ■ Hold-down hardware (pulling hardware) S-HD ■ Anchor bolt M12 ■ Short bracket S *For more details, please refer to the PDF materials or feel free to contact us.

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The "J-Seismic Opening Frame" is a seismic window that was born from the application of the mechanical idea that "the frame bears only horizontal forces without bearing vertical forces." Since it is not restricted by construction methods, it can be used partially, and the installation is straightforward, making it suitable for both new construction and renovation work. It has also received numerous awards, and its performance is widely recognized. This is a dream frame that satisfies both "user desires" and "building codes," evolving wooden houses. 【Features】 ■ Can be installed inside existing columns and beams, regardless of construction method ■ Can be treated similarly to structural plywood and bracing ■ The cross-section of the components remains constant even if the span changes ■ Can be installed on standard foundations *For more details, please refer to the PDF materials or feel free to contact us.

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"GO-TA" is a vibration control system of the brace type that employs a uniquely structured friction damper. When a house shakes due to an earthquake, the friction damper converts the building's sway into thermal energy, suppressing deformation of the structure. Utilizing friction resistance, it reduces the building's deformation (inter-story displacement) by an average of approximately 60% against repeated shaking, and has obtained the Minister of Land, Infrastructure, Transport and Tourism certification with a wall strength ratio of 1.7, making it a strong seismic-resistant wall. It is not only a vibration control system but can also be counted towards the wall quantity as a load-bearing wall. 【Features】 ■ Reduces building deformation by approximately 60% ■ Strong against repeated earthquakes and maintenance-free ■ Easy and efficient installation ■ Usable for both new construction and renovations ■ Achieves low cost through a simple structure *For more details, please refer to the PDF materials or feel free to contact us.

• Anti-vibration, earthquake-proof, vibration-isolating devices
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"Cretech" is a joining hardware made from JIS G 3131 SPHC material. A strong framework can be achieved with a simple combination of bolts and drift pins. It is used to join structural members (such as columns and beams). 【Sizes】 ■GDS-10: 93×40×100mm ■GK-10: 93×40×115mm ■GK-15: 128×40×145mm ■GK-21: 128×40×215mm ■GK-21: 128×40×215mm *For more details, please refer to the PDF document or feel free to contact us.

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We would like to introduce our joint hardware "Tech One." Starting with "Tech One P3," which achieves high-level construction with precision and durability, we also offer a rich lineup including "Tech One TCW," which realizes higher strength while being compact, as well as "Tech One 3S" and "HDP type." In addition, we handle anchor direct connection fittings "PBH-63" and beam support hardware "GUD." Please choose according to your application. 【Lineup (partial)】 ■ Jaw-hanging fitting (Tech One P3) TH ■ Jaw-hanging fitting (Tech One TCW) TCW ■ Jaw-hanging fitting (Tech One 3S) TL ■ Hold-down pipe (HDP type) processing φ22 ■ Mortise pipe (GP type) processing φ27 *For more details, please refer to the PDF document or feel free to contact us.

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