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 floor finish surface. Using an M12 anchor bolt, the loose hole for the anchor bolt can accommodate adjustments of ±6mm. Additionally, by changing the column receiving parts, it can accommodate square columns from 90mm to 300mm, as well as flat columns. 【Features】 - The low height of the double base section at 55mm allows the hardware to be easily concealed below the floor finish surface. - Uses an M12 anchor bolt, with a loose hole for the anchor bolt that accommodates adjustments of ±6mm. - By changing the column receiving parts, it can accommodate square columns from 90mm to 300mm, as well as flat columns. *For more details, please refer to the PDF document or feel free to contact us.

• Support hardware/opening hardware

The "Deco-tube" is a decorative hardware used for the base of independent columns. With its simple and beautiful design, it can be used in conjunction with HDC III-S105/L105, allowing for the operational capacity of HDC III's short-term standard strength (tensile and compressive). 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 ■ The 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.

• Casting and metal decoration

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 from the related links, so please take a look. 【Case Overview】 ■ Span: Less than 8 m ■ Fire resistance: None ■ Year of completion: 2015 ■ 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.

• Joints between components
• Insulation work
• Structural Materials

Here is an example of a nursery school constructed in Nagano Prefecture. The materials used are from 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 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 ■ Materials used: Tech One series *For more details, please refer to the PDF document or feel free to contact us.

• Joints between components
• Insulation work
• Structural Materials

Here is a case study of a facility for disabled employment constructed in Tainai City, Niigata Prefecture. Tech One was used for the manufactured hardware and conventional hardware. This project focused on how to aesthetically integrate the visible hardware, especially in exposed areas. You can view the detailed content of the case from 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.

• Joints between components
• Insulation work
• Structural Materials

Here is an introduction to a case study of the elementary school gymnasium constructed in Obama City, Fukui Prefecture. The roof section and the upper chord of the truss were done with precut work, while the lower chord and diagonal members were done with steel construction. There were challenges in adjustments from the construction drawing review to the assembly, but the joy of successfully completing the frame with the cooperation of both the precut work and the rebar work was special. You can view the detailed content of the case study through the related link, 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 ■ Hardware Used: Custom-made hardware *For more details, please refer to the PDF document or feel free to contact us.

• Joints between components
• Insulation work
• Structural Materials

Here is a case study of the construction of the Urakatan Nursery School 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 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 ■ Construction 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 materials or feel free to contact us.

• Joints between components
• Insulation work
• Structural Materials

Here is an introduction to a case study 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 braces and horizontal braces, showcasing the structural components with a design aesthetic. You can view detailed information about the case study through the related link, so please take a look. 【Case Overview】 ■ Span: Below 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 document or feel free to contact us.

• Joints between components
• Insulation work
• Structural Materials

Here is an introduction to a residential construction project in Yamagata City, Yamagata Prefecture. The roof shape is unique, and the second floor extends significantly. We used custom-made metal fittings at key structural points. You can view 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 ■ Location: Yamagata City, Yamagata Prefecture ■ Total Floor Area: 105.34m2 ■ Metal Fittings Used: Tech One Series / Custom Metal Fittings *For more details, please refer to the PDF document or feel free to contact us.

• Joints between components
• Insulation work
• Structural Materials

Here is an introduction to a case study of a 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 braces was assembled in the factory using structural screws and adhesive, and then transported. 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 ■ Completion Year: 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 materials or feel free to contact us.

• Joints between components
• Insulation work
• Structural Materials

Here is an introduction to a case study of the tourist information center constructed in Myoko City, Niigata Prefecture. The beam structure features radiating rafters arranged around a central post. It involves many special processes, and the construction method was creatively devised. You can view the detailed content of the case study through the related link, 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.

• Joints between components
• Insulation work
• Structural Materials

Here is an introduction to a case study of an office constructed in Gyoda City, Saitama Prefecture. A two-story building with a span of 11 meters 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 plan 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 the detailed information about this case study 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.

• Joints between components
• Insulation work
• Structural Materials

The "fire brace hardware" is a reinforcement hardware that can form horizontal structural planes as an alternative to fire braces. 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 and secure natural light by eliminating fire braces 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 fire braces and structural plywood in conjunction, 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.

• Earthquake-resistant construction method

This catalog is the product catalog of Tatsumi Co., Ltd., which manufactures joining hardware and structural components for wooden houses, as well as OEM production at the request of major housing material manufacturers. In response to the need for enhanced structural strength for earthquake resistance, we are creating products that meet these demands with new equipment. [Contents (excerpt)] ■ Joining 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.

• Joints between components

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

• Joints between components
• Insulation work
• Structural Materials

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 housing-grade timber (under 6m) ■ Truss structure that efficiently utilizes the strength of timber ■ 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.

• Earthquake-resistant construction method
• Other fittings
• others

The "BRS Method" is a welded assembly rebar system that connects the main bars without providing hooks at the ends of the bracing bars. This method can be used for reinforced concrete fabric foundations, slab foundations, and eccentric fabric foundations integrated with 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 ■ Single rebar unit *For more details, please refer to the PDF document or feel free to contact us.

• Special Construction Method
• Steel bar construction
• Reinforced concrete structural systems (including PCa)

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 the bolts. ■ The hardware protrusion is compact at 100mm. *For more details, please refer to the PDF materials or feel free to contact us.

• Joints between components
• Insulation work
• Structural Materials

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 rising 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 engage in custom production tailored to specific projects. We utilize fiber laser processing machines, machining equipment, and welding machines to carry out all manufacturing in-house, providing comprehensive services from the creation of fitting production drawings to manufacturing, plating, and specified inspections. By maximizing our long-developed metal processing technology and know-how as a precut factory, we can produce high-quality products at low costs. 【Features】 - The fittings for joints are becoming larger, and we conduct custom production tailored to specific projects. - We utilize fiber laser processing machines, machining equipment, and welding machines for all in-house manufacturing. - We provide comprehensive services from the creation of fitting production drawings to manufacturing, 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.*

• Other construction services
• Prefab

We handle "Z-marked hardware/C-marked hardware" at our company. 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-marked hardware "HD-B" and others like "S-HD." Additionally, we also offer C-marked hardware "PC," which can 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-marked 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 zigzag hardware S *For more details, please refer to the PDF document or feel free to contact us.

• Joining and fastening materials

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 not only for new constructions but also for renovation projects. Additionally, it has received numerous awards, and its performance is widely recognized. It is a dream frame that satisfies both "user wishes" 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.

• Fiber wall

"Cretec" is a joining hardware made from material JIS G 3131 SPHC. A strong framework can be achieved with a simple combination of bolts and drift pins. It is used for joining 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.

• Joining and fastening materials

We would like to introduce our joint hardware "Tech One." Starting with the "Tech One P3," which achieves high-level construction with precision and durability, we also offer a rich lineup including the "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 ■ Holddown 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.

• Joining and fastening materials