Wire Shoppe P Ltd · Nagpur, India
LRPC Strand Specifications
Unit weight per metre and the supplied technical values for the two LRPC strand sizes listed by Wire Shoppe. Confirm complete requirements against the technical sheet and project specification.
Weight per metre: quick answer
"HT strand" is a common search term for high-tensile prestressing strand. These weights apply only to the listed 12.9 mm and 15.2 mm Tata 7-wire LRPC strand, not to the separate 3 mm × 3-ply HT strand product.
- 12.9 mm LRPC strand: 781 g/m, i.e. 0.781 kg per metre (about 78.1 kg per 100 m).
- 15.2 mm LRPC strand: 1,086 g/m, i.e. 1.086 kg per metre (about 108.6 kg per 100 m).
Unit weight table
Formula: mass (kg) = length (m) × kg/m; length (m) = mass (kg) ÷ kg/m.
The supplied Tata technical delivery condition lists these nominal unit weights with ranges of 765–797 g/m (12.9 mm) and 1,064–1,108 g/m (15.2 mm).
| Size | g/m | kg/m | kg per 100 m | Approx. m per metric tonne |
|---|---|---|---|---|
| 12.9 mm LRPC strand | 781 | 0.781 | 78.1 | about 1,280 m |
| 15.2 mm LRPC strand | 1,086 | 1.086 | 108.6 | about 921 m |
Calculated from nominal unit weight. Actual coil weight and length vary within the manufacturer's tolerance; these are estimates, not a weighed-coil guarantee.
Worked examples
Use these for estimating only. Confirm ordered quantity basis (MT or coils) in the quotation.
- 12.9 mm example: 500 m × 0.781 kg/m = 390.5 kg (nominal).
- 15.2 mm example: 3,000 kg ÷ 1.086 kg/m ≈ 2,762 m (nominal).
12.9 mm LRPC strand
- 7-wire prestressing strand
- Nominal area: 100 mm²
- Minimum breaking load: 186 kN
- Proof load / load at 1% extension: 164 kN
- Minimum elongation: 3.5%
- Nominal unit weight: 781 g/m
- Nominal tensile strength: 1860 MPa
- Standard: IS 14268:2022
15.2 mm LRPC strand
- 7-wire prestressing strand
- Nominal area: 139 mm²
- Minimum breaking load: 259 kN
- Proof load / load at 1% extension: 228 kN
- Minimum elongation: 3.5%
- Nominal unit weight: 1,086 g/m
- Nominal tensile strength: 1860 MPa
- Standard: IS 14268:2022
Relaxation limit
The supplied Tata technical delivery condition states a maximum relaxation loss of 2.5% after 1,000 hours under the stated test condition of 70% of minimum specified breaking load. This value should not be generalized beyond that condition.
Source documents
Use the available Tata Wiron brochure and technical delivery condition for complete product and test information. The project specification remains controlling for procurement.
Products and quotation
Frequently asked questions
What is the weight per metre of 12.9 mm HT strand?
For the listed Tata 12.9 mm 7-wire LRPC strand, nominal unit weight is 781 g/m (0.781 kg/m).
What is the unit weight of 15.2 mm HT strand?
For the listed Tata 15.2 mm 7-wire LRPC strand, nominal unit weight is 1,086 g/m (1.086 kg/m).
Do these weights apply to the 3 mm × 3-ply HT strand?
No. They apply only to the 12.9 mm and 15.2 mm 7-wire LRPC strand.
Is the calculated length per tonne exact?
No. It is a nominal estimate; actual coil weight and length vary within tolerance.