By reinforcing with an EG ring, we ensure stiffness, strength, and deformation performance equivalent to that of a solid beam.
The EG ring is a construction method for reinforcing through-holes in steel beams. Compared to conventional methods using plates or sleeve pipes, it can reduce total costs. Features Even when a through-hole is made in a beam, reinforcing it with the EG ring ensures that it maintains the same rigidity, load-bearing capacity, and deformation performance as a solid beam, which is its main feature. Additionally, the EG ring type Z significantly reduces the amount of welding compared to conventional reinforcement and allows for construction with even less welding than the improved NS type. Furthermore, the welding positions during construction can be vertical or horizontal, making on-site construction feasible. Additionally, if the rings available in the menu do not meet the required load-bearing or dimensional specifications, custom rings can be designed freely in terms of strength and shape to fit the installation location, thereby expanding the flexibility of equipment design. *For more details, please refer to the PDF materials or feel free to contact us.
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Scope of Application Applicable Beam Material: Steel of 400 to 590 N/mm² grade Web Width-to-Thickness Ratio: FA, FB, FC, FD ranks Beam Depth (D): 1500 mm or less Through Hole Diameter (d): φ750 mm or less and 2D/3 or less Distance from Beam End to Hole Center (Lh): Lh ≧ 250 mm + 1/2d (D ≦ 750 mm) Lh ≧ D/3 + 1/2d (D > 750 mm) In-Plane Eccentricity (e): e ≦ D/3 - d/2 However, if provided in the portion excluding the plasticized area, it shall be as follows: e ≦ 7D/18 - d/2 Minimum Pitch of Holes: Distance between hole centers (P) must be 0.75(d1 + d2) or more However, d1 and d2 are the diameters of two adjacent through holes Distance Between Rings: 15 mm or more Installation of Through Holes in Plasticized Area: Up to two locations Application to Beams Subject to Axial Force: Beams subjected to variable axial forces up to an axial force ratio of 0.1. (The adoption for axial force beams shall be based on the designer's instructions.) *For more details, please refer to the PDF document or feel free to contact us.
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Toranomon/Azabudai District Type 1 Urban Redevelopment Project Facility Construction Work Umeda 3-chome Project (Tentative Name) Construction Work Umeda 1-chome Block 1 Project Phase 2 Fukuoka Airport Domestic Passenger Terminal Building Renovation Work (Tentative Name) Yodobashi Umeda Tower New Construction Work *For more details, please refer to the PDF materials or feel free to contact us.
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Our company is engaged in the design, manufacturing, and construction of various steel structures such as steel frames, bridges, steel towers, sluices, and plant steel structures, as well as lightweight metal structures. As a specialized manufacturer that consistently handles everything from the design to the production and construction of steel structures like bridges and steel frames, we have been involved in numerous large-scale projects and contribute to the development of social infrastructure, where "the joy of manufacturing leads to people's smiles." Please feel free to contact us if you have any inquiries.