Products made from rolled thin plate steel. Used in various structures of prestressed concrete. There are also polyethylene versions available.
Spiral sheaths for prestressed concrete are lightweight rolled pipes made from strip steel with a width of 34 to 100 mm and a thickness of 0.23 to 1.0 mm, manufactured using our unique production method. They are used in various structures of prestressed concrete. The characteristics of the spiral sheath include the ability to easily form stable curved shapes due to sufficient flexibility, having adequate necessary strength despite being thin and lightweight, a high adhesion strength with concrete, and the capability to be produced in any desired length. Additionally, the selection of material and steel plate thickness can be customized according to the construction method and application. For more details, please contact us or download the catalog.
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basic information
【Lineup】 ■ Steel Spiral Sheath Series ○ #1000 Standard Type → A standard sheath widely used as a sheath for prestressed concrete. ○ #2000 Special Pressure Type → A strengthened sheath used when inserting PC steel wire after concrete placement or when using a pushing machine to insert PC steel wire. ○ #3000 WS Type → A sheath with high flexibility and resistance to bending, which can be coiled. ○ #4000 Linear Type → A sheath with high linearity used for applications such as lateral tightening. ○ #5000 Stainless Steel Special Pressure Type → Used for applications that require special rust and corrosion resistance for the sheath. ○ #6000 Stainless Steel WS Type → Used for applications that require special rust and corrosion resistance for the sheath. ■ Polyethylene Spiral Sheath Series ○ #8000 → A polyethylene sheath for inner cables that has many functions not found in conventional sheaths. ○ #9000 → Protects against salt damage caused by seawater or sea breeze in PC structures, or salt damage from the application of antifreeze in cold regions, preventing salt from penetrating into the concrete and protecting against the failure and damage of PC steel materials.
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Company information
In today's world, where it is said that "there are no borders in technology," we swiftly incorporate excellent innovations from around the globe and continuously send our own technologies out into the world. This is JL's principle. In 1984, we formed a technological partnership with the British company Cretec and launched high-strength mortar spacers. Furthermore, in 1986, we contracted with the German company Frimeda for lifting anchors, in 1994 with the German company Halfen for cast-in channels, and with the Dutch company Deha for bar couplers, and we are actively selling these products. As overseas cooperative factories, we have foundries and fine ceramic products in South Korea, two joint ventures and one cooperative company in China, two wholly-owned companies in China, one wholly-owned company in South Korea, and a cooperative factory in Vietnam. We contribute widely to the world, not only within Japan, in the manufacturing of construction materials, machine parts, shipbuilding components, and multi-story parking components, as well as surface treatments such as dacromet processing and zinc plating.