1. Start with your project requirements

Get these answers from your formwork designer or site engineer before comparing products:

• Required load per tie. The company publishes an approximate break loading capacity for each grade. That figure is not a working load. Your project engineer has to set the working load and safety margin based on pour height, concrete pressure and the local standards that apply.
• Thread system and diameter. The rod has to match the nuts, waller plates and other accessories you already use or plan to buy.
• Wall thickness and form layout. These decide the rod length you need and how many rods to order.
• Exposure and reuse. These affect whether you choose a natural or galvanized surface.

2. Compare material grades by published break loading capacity

The published materials list three grades of steel formwork tie rod:

The company describes PSB830 as the grade for the highest loading capacity. Choose the grade from the load your engineer has calculated, not just from the highest number. These are approximate break values from the product description. Ask for batch test results if your project needs documented proof of performance.

3. Check the dimensional specification

The published specification for the formwork tie rod is:

• Diameter: OD15/17mm (inner diameter 15mm, outer diameter 17mm)
• Step: 10mm
• Length: 1, 2, 3, 4, 5 or 6 meters

If your formwork tie rod system uses a different diameter or thread step, this specification may not fit. Confirm compatibility with your accessories before ordering.

4. Match the tie rod with a compatible tie nut

A tie rod is only one part of the system. The company's formwork tie nut materials list wing nuts made from ductile cast iron (JIS FCD450) in several sizes, including OD17*10mm. That size matches the published OD15/17mm diameter and 10mm step of the tie rod. The tie nuts are listed with a loading capacity of more than 180 kN and are described as reusable after unfastening. Base diameters range from 80mm to 130mm, depending on the model.

The tie nut materials also name related system parts, such as waller plates, steel cones, hex nuts and rapid clamps. When you plan a complete tie rod concrete formwork order, list every component and confirm the thread match for each one.

5. Choose a surface finish

All three rod grades are offered with natural, yellow galvanized or silver galvanized surfaces. The company describes the coating as electro-galvanizing applied to improve corrosion resistance. Natural finish may suit short-term use. For repeated use or storage in damp conditions, ask the supplier about the galvanized options.

6. Review production and quality documentation

The company's published process description includes:

• Testing the chemical composition and mechanical properties of each batch of raw material
• Cutting threads so the rods are compatible with tie rod nuts and washers
• Inspecting the finish for uniformity
• Running tensile strength tests on sample tie rods
• Keeping records of the production process, quality checks and test results

If your project or local regulations require compliance records, ask for the relevant test results and documents for your batch before shipment.

7. Confirm commercial terms

The published commercial details are:

• MOQ: 1000 meters
• Packaging: in bundles or on pallets
• Trade terms: EXW / FOB / CNF / CIF

When this formwork tie rod may not fit

• Your formwork system needs a diameter or thread step other than OD15/17mm with a 10mm step.
• Your project needs less than the 1000-meter MOQ.
• Your engineer's required load is higher than the published break loading capacity of the grade you are considering. The published figures stop at about 180 kN for PSB830.
• You need a specific certification or a stated working load rating.

Summary checklist

1. Engineer-calculated load per tie, which decides the grade (Q235, 45# or PSB830)
2. Diameter and step (OD15/17mm, 10mm step)
3. Length (1 to 6 meters)
4. Matching nuts and accessories (for example, an OD17*10mm tie nut)
5. Surface finish (natural, yellow galvanized or silver galvanized)
6. Batch test records and documents
7. MOQ, packaging, trade terms, plus a written quotation covering price and lead time