ケーティービー List of Products and Services

The "KTB System Comprehensive Catalog" is a comprehensive catalog from KTB Corporation, which is engaged in the development of new materials, technologies, and construction methods in civil engineering, component systems, and architecture. It includes the "KTB Anchorage Method," which is a fixation method for prestressed concrete, as well as the "KTB Anchor Method," and examples of construction in architecture and civil engineering. [Contents] ■ Examples of construction in architecture and civil engineering ■ KTB Anchorage Method ■ KTB Anchor Method ■ Types of KTB Anchor Method ■ Pressure plates for KTB Anchor Method, etc. For more details, please refer to the catalog or feel free to contact us.

• Ground foundation construction method
• Earthquake-resistant construction method
• Renovation and repair methods

The "SC Strand & KTB Anchorage Method" uses SC strands, which are PC steel wires with a full wire coating, as the tensioning material and employs both wedges and nuts for anchoring. "SC Strand" is formed by thermally fusing epoxy resin powder coating onto each core wire and side wire of the PC steel wire using an electrostatic powder coating method, achieving complete rust prevention. The film thickness is between 120 and 280 µm, allowing for direct attachment of crimp grips and demonstrating excellent anchoring performance. 【Features】 - Eliminates set loss during anchoring, allowing for free re-tensioning - High durability - Excellent anchoring performance - Superior fatigue performance - Reduction in construction costs For more details, please refer to the catalog or feel free to contact us.

• Special Construction Method
• Bridge Materials

"SCS Slab" is a precast slab for replacement that achieves ultra-long lifespan of the deck by combining completely rust-proof SC strands with high-strength concrete. By using SC strands, which are corrosion-resistant steel materials, instead of PC steel wires, it protects the deck from the uncertainties of grout filling and the effects of salt damage. 【Features】 ■ High durability PC structure ■ Labor-saving and improved workability with high-quality precast components ■ High-strength concrete: Concrete strength of 50 N/mm² or more ■ Protects PC steel materials from corrosion even in the event of grout failure ■ Reduces lifecycle costs through ultra-long lifespan For more details, please refer to the catalog or feel free to contact us.

• Bridge Materials
• Civil Engineering Method

The "KTB・PCaPC External Frame Seismic Reinforcement" is a seismic reinforcement method that enhances the seismic performance of existing buildings using the PC joint construction method, allowing for continued use even after a major earthquake. Columns and beams are manufactured from high-quality, high-strength PC materials in a factory, enabling rapid construction on-site. Additionally, it allows for the renovation of the building's facade without altering the current living environment in terms of natural light and ventilation, creating a new image. 【Features】 ■ Possesses elastic properties that allow it to return to its original state even after significant deformation from a massive earthquake. ■ Construction can be carried out while the building is in use. ■ Seismic reinforcement work can be completed safely and in a short period. ■ Ground anchors can prevent the building from toppling during an earthquake. ■ Technical evaluation report obtained from the Japan Architectural Disaster Prevention Association. For more details, please refer to the catalog or feel free to contact us.

• Earthquake-resistant construction method
• Renovation and repair methods

The "KTB Vertical Ground Anchor Method" uses fully rust-proof strands for tendons, equipped with ultra-rust prevention features, effectively functioning for seismic reinforcement, preventing toppling, and preventing uplift. It reliably transmits the designed anchor force to the ground, forming an extremely safe permanent anchor body. You can choose between two permanent anchor methods: the "KTB Load Distribution Type Permanent Anchor" and the "KTB Tension Type SC Permanent Anchor," both of which have obtained technical review certification from a Ministry of Land, Infrastructure, Transport and Tourism accredited organization. 【Features】 ■ Maintains stable pull-out resistance ■ Excellent corrosion resistance ■ Construction and economic efficiency tailored to ground conditions ■ Ease of maintenance and management ■ Permanent anchor methods with technical review certification For more details, please refer to the catalog or feel free to contact us.

• Ground foundation construction method
• Earthquake-resistant construction method
• Renovation and repair methods

Yamadaike Park is a park that makes the most of its rich natural surroundings, located almost in the center of Hirakata City. The northern area features various spots where visitors can fully enjoy plants, including an aquatic flower garden, captivating them with seasonal flowers. The southern area has a spacious lawn that provides a sense of openness to people. A beautiful PC bridge called Yamadaike Mitsuki Bridge has been completed as a connecting bridge between the northern and southern areas. Until now, access was only possible from the eastern and western ends of the vast grounds, but the completion of this bridge has made it much more convenient. For more details, please contact us or refer to the catalog.

• Foundation construction

"SC Strand" is a product that forms a coating by thermally fusing epoxy resin powder paint onto the outer peripheral surfaces of the core wires and side wires that make up PC steel strands using an electrostatic powder coating method. It has ultra-durability against various corrosive environments. Furthermore, this product not only retains the strength characteristics of PC steel strands but also maintains the adhesion strength with concrete and the flexibility of PC steel strands equivalent to those before processing. Additionally, it has the advantage that all conventional fixtures and other tools for PC steel strands can be used as they are. For more details, please contact us or refer to the catalog.

• Other civil engineering works
• Concrete Machinery

The external cable reinforcement method aims to improve bending and shear resistance by placing PC steel materials outside the member and applying tension through anchorage or deflection points. The KTB external cable reinforcement method uses PC steel materials that are particularly excellent in corrosion resistance and fatigue resistance, and employs SC unbonded or Ducst unbonded materials that are not subject to UV degradation. For more details, please contact us or refer to the catalog.

• Steel
• Reinforcement and repair materials
• Foundation construction

The Kansai East Connecting Road is a "regional high-standard road" that connects Saitama Prefecture (Kanetsu Expressway, Hanazono Interchange) and Yamanashi Prefecture (Shin-Yamanashi Ring Road). It aims to promote the exchange of people and goods between the northern Kanto region and the Koshin and Tokai regions, and to revitalize the economy and tourism as a new high-speed network road under construction. Among these, a five-span continuous PC box girder bridge (tentatively named New Mainano Bridge, main span 725.5 m) is being constructed on the rising lane on the Mainano Town side, which crosses the Arakawa River and the Chichibu Railway as part of the Kainano Chichibu Bypass. The external cables of this bridge have adopted SC Unbonded (SC-U1e). For more details, please contact us or refer to the catalog.

• Steel
• Dam construction
• grout

"SC Unbond" is a product that forms a coating by thermally fusing epoxy resin powder paint onto the outer peripheral surfaces of the core wire and side wires that make up PC steel strands using an electrostatic powder coating method. It has ultra-durability against various corrosive environments. Furthermore, this product not only retains the strength characteristics of PC steel strands but also maintains the adhesion strength with concrete and the flexibility of PC steel strands equivalent to that before processing. Additionally, it has the advantage that all conventional fixtures and other tools for PC steel strands can be used as is. For more details, please contact us or refer to the catalog.

• Other civil engineering works
• Concrete Machinery

The SPC composite girder bridge arranges steel frames within the upper flange and takes the reaction forces of external cables at both ends. This structure allows for the formation of a tension structure within the cross-section, enabling a significant elevation of the neutral axis. Additionally, by incorporating steel frames, rigidity is enhanced, allowing for the tensioning of a total of 12 strands from both external and internal cables at the Atogase Bridge, which greatly helps in suppressing concrete creep and drying shrinkage. Furthermore, regarding PC steel wires, fully rust-proof SC strands and SC unbonded wires are used throughout, resulting in a structure with excellent corrosion resistance. For more details, please contact us or refer to the catalog.

• Steel

The KTB anchoring method is a post-tensioning type of prestressed concrete anchoring technique applicable to all PC structures, encompassing a system that includes the basic anchoring body, PC steel strands, connectors, and more. The KTB anchoring method is adopted in a wide range of civil engineering and construction fields, such as PC bridges, building structures, PC tanks, marine structures, and ground anchors, due to its excellent workability, safety, high quality, and cost-effectiveness. In April 1978, the KTB Association was established to promote the dissemination, technological advancement, and development of this method. Additionally, SC strands (epoxy-coated PC steel strands) are ultra-durable PC steel strands with groundbreaking anti-corrosion technology, having obtained construction technology certification from the Civil Engineering Research Center in April 1995 (Chairman: Naoharu Ikeda, Professor at Yokohama National University). Thus, we take pride in confidently recommending the KTB anchoring method and SC strands as technologies that meet the needs of a new era. For more details, please contact us or refer to our catalog.

• Secondary steel products
• Foundation construction
• Other civil engineering works

In anchor construction, the angle of installation and the angle of the bearing area are not necessarily perpendicular, and it is not uncommon for angle adjustments to be required. Additionally, because the slope gradient is not uniform, angle adjustments are often needed for each anchor hole. The angle adjustment base "Kakudo-kun" combines two plates with angles (upper base and lower base) to allow for easy selection and adjustment of the required angle on-site, facilitating smooth anchor installation.

• Earth retaining wall/foundation reinforcement
• Earthworks
• Pile and foundation work

The globally widespread tension-type anchor can cause cracking in the grout due to localized load concentration, leading to issues such as tendon corrosion. This construction method uses fully coated PC steel wire <SC strand> and is a permanent anchor that solves this problem all at once. NETIS Registration No: KT-990247-V

• Earth retaining wall/foundation reinforcement
• Earthworks
• Ground foundation construction method

The KTB load distribution type permanent anchor method is a groundbreaking structure that distributes loads by providing multiple load-bearing bodies, making it the world's first permanent anchor of its kind. It avoids localized concentration of loads, preventing cracks in the grout. It excels in long-term corrosion resistance, durability, and structural stability. NETIS Registration No: KT-990136-A

• Ground foundation construction method

The U-turn removal anchor method is the world's first load-distributing removal anchor developed for pulling out PC steel strands after the installed rock anchors have been used. By adjusting the load-bearing bodies according to the designed anchor force, the PC steel strands are turned back at the tips of each load-bearing body, allowing for uniform tension and fixation across each load-bearing body.

• Earth retaining wall/foundation reinforcement
• Earthworks
• Ground foundation construction method

The frame made of Galvalume pseudo-container steel plate utilizing high-tech technology is completely rust-proof and exhibits excellent durability and weather resistance. Additionally, it is extremely lightweight due to its hollow sealed design (about 1/6 the weight of conventional concrete pressure plates), allowing for construction without the need for large machinery, making it practical and economical. NETIS Registration No: KT-000115-A

• Retaining wall
• Earthworks
• Pile and foundation work