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Z-marked hardware / C-marked hardware

Z-marked hardware / C-marked hardware

Introducing a wide range of products, including the Z-mark display hardware "S-HD," which allows for mutual connection of pillars on different floors!

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

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[Product Catalog] Building Hardware for Wooden Houses, Joint Hardware, Custom Hardware, Reinforcement Hardware

[Product Catalog] Building Hardware for Wooden Houses, Joint Hardware, Custom Hardware, Reinforcement Hardware

Even if the products we create are small, the trust and achievements we have built are significant. To protect wooden houses and the people who live in them.

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

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[Construction Example] Residential / Yamagata City, Yamagata Prefecture

[Construction Example] Residential / Yamagata City, Yamagata Prefecture

A property with a unique roof shape and a large overhang on the entire second floor! We used fabricated metal fittings in key structural areas.

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

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[Construction Case] Nursery School / Nagano Prefecture

[Construction Case] Nursery School / Nagano Prefecture

The total floor area is 1580.09m2! Here is an introduction to a case where the Tech One series was used to construct a nursery.

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

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[Construction Example] Elementary School / Ibaraki Prefecture

[Construction Example] Elementary School / Ibaraki Prefecture

Using the Tech One series! Introduction of a case study for constructing an elementary school with a span of less than 8 meters.

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

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Decorative cylindrical column base hardware "Deco-tube"

Decorative cylindrical column base hardware "Deco-tube"

The color variations have increased! The short-term standard strength (tensile, compressive) of HDC III is now operational.

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

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Pipe-type independent low column foot hardware "LB"

Pipe-type independent low column foot hardware "LB"

The processing of the column connection is the same Φ22 as the hold-down pipe! It is used at the joint of the independent column's base.

"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

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Joining hardware "Tech One"

Joining hardware "Tech One"

We offer a wide range of products, including the "Tech One P3," which achieves high-level construction with precision and durability!

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

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Joining hardware "Kuretec"

Joining hardware "Kuretec"

A strong framework is achievable! Introducing the hardware used for joining structural members (such as columns and beams).

"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

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OEM and custom metal fittings

OEM and custom metal fittings

It is possible to produce high quality at low cost! We are focusing on the production of custom metal fittings for wooden non-residential buildings.

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

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Joining hardware "Tech One P3"

Joining hardware "Tech One P3"

A strong framework is achievable! We have succeeded in establishing a simple and rational construction system.

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

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Joint hardware "Tech One TCW"

Joint hardware "Tech One TCW"

Optimizing board thickness to achieve high strength! This enables application to a wider range of wooden structures.

"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

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Do you not need fireproof materials? Design and light transmission enhancement 'Fireproof-less hardware'

Do you not need fireproof materials? Design and light transmission enhancement 'Fireproof-less hardware'

Clear open space! Improved design! Horizontal structural reinforcement hardware that eliminates the need for bracing 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

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[Construction Example] Office / Gyoda City, Saitama Prefecture

[Construction Example] Office / Gyoda City, Saitama Prefecture

The second floor is a large space measuring 10.92m × 24.57m! A two-story office building with a span of 11m realized using only residential 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

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[Construction Example] Tourist Information Center / Myoko City, Niigata Prefecture

[Construction Example] Tourist Information Center / Myoko City, Niigata Prefecture

Using the Tech One series and custom metal fittings! With many special processes, we also put a lot of thought into the construction methods.

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

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