Stålbyggnadsfilm
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Component overview
Our new tension rod system NFG-DS replaces our previous system, Tension Rod System 8.8.
NR
1
2
3
4
5
6
7
8
9
9
Product Group
2312
2323
2310
2311
1302
2314
2324
2313
2319
2320
Designation
Double-sided fork
Single-sided fork 640
Spacer
Turnbuckle
Threaded rod
Coupling sleeve
Cross sleeve
Tension rod
Connection plate 90 degrees
Straight connection plate
Tension Rod System
Table 1: Material Properties
| Product Name | Material | Yield Strength [N/mm²] | Ultimate Strength [N/mm²] | Impact Toughness [J at -20°C] | Min. Elongation [%] |
| NFG DS 640 | Carbon Steel | 640 | 800 | 27 | 12 |
| NFG DS 5001) | Carbon Steel | 500 | 620 | 27 | 12 |
¹⁾ Refers to double-sided fork M24 (23122402300205L) and M30 (23123002650205L) with smaller locking bolt dimensions.
Table 2: Design Values
| Dimension [mm] |
Nom. Diameter [mm] | Nom. Yield Force NRk,y [kN] | Nom. Ultimate Force NRk,u [kN] | Design Load1,3) NRd [kN] | |
| Double-sided fork | Single-sided fork 640 | ||||
| M12 | 12 | 54 | 67,4 | - | 51 |
| M16 | 16 | 100 | 125 | 94 | 89 |
| M20 | 20 | 157 | 203 | 147 | 147 |
| M24 | 24 | 226 | 293 | 208 / 1982) | 212 |
| M30 | 30 | 359 | 466 | 321 / 2632) | - |
¹⁾ When combining different fork types, the lowest design capacity (NRd) must be used.
²⁾ Capacity refers to double-sided fork M24 (23122402300205L) and M30 (23123002650205L) with smaller locking bolt dimensions.
³⁾ Capacities are designed according to Eurocode 3.
Table 3: Recommended Locking Bolts
| Fork | Double-sided Fork VG 2312 | Single-sided Fork 640 VG 2323 |
| EN 14399-4 10.9 FZV incl. Nut | EN 15048-1 8.8 U FZV | |
| M12 | - | M16 |
| M16 | M16x55 | M20 |
| M20 | M20x65 | M24 |
| M24 | M24x75 / M20x651) | M30 |
| M30 | M30x85 / M27x801) | - |
¹⁾ Refers to smaller locking bolt dimensions for double-sided fork M24 (23122402300205L) and M30 (23123002650205L).
Installation and Assembly
- Ensure each component’s thread is screwed in at least 1.5 x the diameter to avoid thread stripping. Verify this with color markings on the rod.
- Screw the spacer together with the turnbuckle to allow tensioning of the rod.
- Attach forks, turnbuckle, and coupling sleeve with other components such as the tension rod and threaded rod.
- For splicing with a coupling sleeve, utilize the full thread length.
- Tension the rod with the turnbuckle by rotating it until the required load is achieved.
- Install the locking bolt with normal tightening.
- For additional security, lock the rod by adding a hex nut at each end inside the forks and a nut in front of the turnbuckle/spanner sleeve.
- Use a cross sleeve if the rods are to be crossed.
The assembly and installation are now complete.
