The tensioning has already been introduced at our factory. This is a PC steel bar that does not require tension management or grouting work at the construction site.
The NAPP method involves placing pre-tensioned hollow PC steel rods, called "NAPP units (R)," within a formwork, and after pouring and curing the concrete, releasing the tension to introduce prestress into the concrete. The tension is introduced at our factory, which is strictly managed, and delivered to the site. At the construction site, prestress can be introduced without using reaction abutments or hydraulic jacks, eliminating the need for complex tension management, sheath placement, and grouting. This method is particularly efficient in challenging work environments, such as high altitudes, where introducing prestress is difficult. ■ Examples of NAPP method implementation Reinforcement of external cable anchorage, reinforcement of misalignment sections, reinforcement of PC steel anchorage, shear reinforcement, and lateral tightening. ■ Examples of NAPP anchor method implementation Widening of existing bridge abutment edges, reinforcement of external cable anchorage, and reinforcement of bridge substructures (widening of low slabs).
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basic information
We offer four types of standard NAPP units (input force 220kN to 620kN) and two types of internal screw units (input force 220kN to 400kN). The internal screw type allows for a smaller drilling diameter in applications such as lateral tightening of the external cable fixation block. *For detailed specifications, please contact us or download the PDF for more information.*
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Applications/Examples of results
Concrete bridge, seismic reinforcement, infrastructure repair, anchor, architecture, civil engineering.
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Company information
Netsuren successfully commercialized and industrialized IH (Induction Heating) technology for the first time in Japan in 1946 (Showa 21). This IH technology is a double eco (Ecological and Economical) technology that uses clean electricity as its heat source, making it environmentally friendly and pollution-free. As a pioneer in this field, Netsuren has developed highly original products in addition to contract heat treatment processing, based on the know-how accumulated since its founding and its high level of technical and development capabilities, bringing transformation and contribution to various industries. The fact that Netsuren exists today and can contribute to society, even in a small way, is thanks to your unwavering support and warm patronage. To enhance corporate value through harmony and coexistence with customers, business partners, shareholders, society, and employees, Netsuren aims to remain a company with a dignified presence in the future. We will return to the founding principle of "Technology of Netsuren" and continue our tireless efforts to be of greater service to society in the coming era.