D15/17 Form Tie Rod
D15/17 all-thread rod (DW15, 17/10 profile), 1.47–1.50 kg/m, tested tensile 110–180 kN by material.
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1 / 3Form Tie Rod Series
D15/17 Form Tie Rod
Produced on CNC thread-rolling lines for burr-free threads and consistent geometry. DW15 (15mm root / 17mm outer thread, 7.5mm pitch) third-party tested tensile capacity by material: Q235 100-110 kN, 45# 120-140 kN, 40Cr 140-160 kN, precision-rolled 180 kN (values are tested tensile, not allowable working load — divide by the applicable safety factor for design); Rd20 reaches approximately 230 kN rated per factory data. Threads follow DIN 976, A193 B7 or GB/T 15389; materials range from Q235 to 45#, 40Cr and 20MnTiB with plain, electro-galvanized, hot-dip galvanized or Dacromet finishes.
Specifications
- D15/17 all-thread rod (DW15, 17/10 thread), 1.47–1.50 kg/m
- Third-party tested tensile: Q235 100-110 kN · 45# 120-140 kN · 40Cr 140-160 kN · precision-rolled 180 kN (tested tensile, not allowable working load)
- Also available: D20/22 (2.60 kg/m, tested tensile 210-240 kN by material) — see D20/22 Form Tie Rod
- Length 200–8000mm, cut to length
- Q235 / 45# / 40Cr / 20MnTiB
- DIN 976 / A193 B7 / GB/T 15389 threads
- Plain, electro-galvanized, HDG or Dacromet
Prices are quoted based on product specifications, material/grade, quantity, destination and current market conditions. Contact us for the latest quotation.
Engineering-reviewed quote within 24 hours.
Technical Specifications
| Thread | D15/17 — 17mm outer thread × 10mm pitch (17/10 profile), same product as domestic D15 |
| Load Rating | Tested tensile 100-180 kN by material (tested, not allowable working load) |
| Grades | 4.8 / 8.8 / 10.9 per ISO 898-1 |
| Material | Q235 / 45# / 40Cr / 20MnTiB |
| Length | 200–8000mm, custom cut-to-length |
| Surface | Plain, electro-galvanized (8–25µm), HDG (45–85µm), painted, Dacromet |
| Packaging | Bundled on pallet, VCI wrap, seaworthy cartons |
MaterialD15/17: Q235 · 45# · 40Cr · precision rolled (selectable by load)
Surface FinishPlain (black) · Electro-galvanized · Hot-dip galvanized · Dacromet
Rated LoadD15/17: 3rd-party tested tensile — Q235 100-110 kN · 45# 120-140 kN · 40Cr 140-160 kN · precision-rolled 180 kN (tested tensile, not allowable working load)
Unit WeightD15/17: 1.47–1.50 kg/m
PackagingBundled on pallet · VCI wrap · seaworthy cartons · marked per BOM
Production Process
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06Material Grades Explained
| Grade | Notes |
|---|---|
| Q235 | Plain carbon steel. Economic option for light and medium formwork loads. Not heat treated. |
| 45# | Medium carbon steel. The standard formwork tie rod grade in China; quenchable to class 8.8. |
| 40Cr | Alloy steel. Higher hardenability and better fatigue performance than 45#; used where repeated reuse matters. |
| Class 10.9 bolt | Quenched and tempered alloy steel bolt used in the climbing cone set. Not electroplated without a documented baking cycle. |
| QT450-10 | Ductile (nodular) iron with 450 MPa tensile and 10% elongation. Used for sleeves and embedded plates where toughness and castability matter. |
| HRB400 | Hot-rolled ribbed bar (threaded steel) to Chinese standard. Used for embedded foot bolts; good bond with concrete. |
Applications
Procurement Guide
- Confirm rod diameter and required load class with your structural engineer
- Match cone, sleeve and wing nut threads to the rod before ordering
- Request mill certificates (EN 10204 3.1) for structural applications
- For outdoor or aggressive environments, specify HDG 45–85µm or Dacromet
Procurement Information
- OEM / Custom
- Own drawing or label welcome
- MOQ
- Trial orders OK · mixed SKU welcome
- Lead time
- Stock 3d · Custom 7-15d
- Packaging
- Seaworthy: pallet + strapping + waterproof
- Payment
- T/T · L/C at sight
- Incoterms
- FOB Tianjin · CIF · CFR · EXW
Related Technical Reading
Related Products
D15 vs D20 Formwork Tie Rod Comparison
Both rods are produced on the same lines, to the same grades and coatings — the choice comes down to the load your wall carries and the tie spacing your formwork design allows.
| Parameter | D15/17 (DW15) | D20/22 (Rd20) |
|---|---|---|
| Thread | DW15: 15 mm root, 17 mm OD, 7.5 mm pitch | Rd20 continuous thread |
| Indicative tension | ≈150 kN | ≈230 kN |
| Grades | 4.8 / 8.8 / 10.9 per ISO 898-1 | 4.8 / 8.8 / 10.9 per ISO 898-1 |
| Materials | Q235 / 45# / 40Cr / 20MnTiB | Q235 / 45# / 40Cr / 20MnTiB |
| Typical use | Slab and standard wall formwork | High-pressure walls, columns, bridge falsework |
| Length | 200–9000 mm, cut to length | 200–9000 mm, cut to length |
Tension figures are indicative typical values — actual capacity depends on the selected grade and material; final selection must be verified against your formwork design.
Technical FAQ
D15/17 Form Tie Rod — Answers for Engineers and Buyers
Standard diameters cover D15 and D20, with bar length cut to the wall thickness plus the required allowance for nuts, plates and walers. Non-standard diameters and lengths can be produced to drawing.