GEWI ® Threadbar System
High Yield Steel for Reinforcement of Concrete
Key features of the system are:
- Fully threaded bar - can be cut and coupled at any point.
- Robust threadform - ideal for construction site use.
- Coarse pitch threadform with two flats - ensures self-cleaning of thread.
- Fully galvanized systems - galvanized threadbars and accessories also available from stock.
The GEWI ® Threadbar System consists of high yield GEWI ® screwable steel and corresponding coupling and anchoring accessories, which enable (in a very easy and perfect way) connections to and anchorages of the GEWI ® steel. In accordance with the German certificates of appraval Z-1.5-76, Z-1.5-149 and Z-1.5-2.
GEWI ® Steel High Yield Threadbar is a high tensile alloy steel bar which features a coarse right-hand thread over its full length. The system is proven worldwide and ofters versatility in a range of applications. Manufactured in accordance with the German Certificate of Approval issued by the Deutsches Institut für Bautechnik, the system also ofters general conformance with BS 4449 : 1997 (Carbon Steel Bars for Prestressing of Concrete).
The minimum specified characteristic yield strength is 500 N/mm2 for bar diameters 16 - 50 mm and 555 N/mm2 for the 63.5 mm diameter bar. 16 - 50 mm bars can be welded using appropriate industry practices relative to the carbon content of the steel. Welding of the higher grade 63.5 mm diameter bar is not recommended.
| GEWI ® bar Ø | Steel grade yield fy/tensile strength ft | Ultimate tensile force Ft | Yield Force Fy | Cross sectional area | Diameter over threads | Bare weight | ||||||
| [mm] | [N/mm2] | [kN] | [kN] | [mm2] | [mm] | [kg/m] | ||||||
| 16 | 500/550 | 111 | 100 | 210 | 19 | 1.58 | ||||||
| 20 | 500/550 | 173 | 157 | 314 | 23 | 2.47 | ||||||
| 25 | 500/550 | 270 | 245 | 491 | 28 | 3.85 | ||||||
| 28 | 500/550 | 339 | 308 | 616 | 32 | 4.83 | ||||||
| 32 | 500/550 | 442 | 402 | 804 | 36 | 6.31 | ||||||
| 40 | 500/550 | 691 | 628 | 1257 | 45 | 9.87 | ||||||
| 50 | 500/550 | 1080 | 982 | 1963 | 56 | 15.40 | ||||||
| 63.5 | 555/700 | 2219 | 1758 | 3167 | 69 | 24.80 | ||||||
| (a) For geotechnical applications 75% of the ultimate tensile force Ft may be used for testing Modulus of elasticity: E =205,000N/mm2 ± 5%. Stock lengths: All bar diameters 12.0 m. Tolerances ± 100 mm. Special lengths up to 15.0 m can be ordered. All bar diameters can be cut to length to suit customer requirements, or can be supplied bent. | ||||||||||||