EN 14889-1 · hooked-end anchor fibre
Steel Fibre Calculator
Estimate steel-fibre kilograms, boxes, pallets, shipped weight and cost — from a slab or a concrete volume, instantly.
FibreCalc.com covers EN 14889-1 hooked-end anchor fibre. It is a quantity & cost estimator — not a structural design tool; final dosage for structural use must be set by a qualified engineer.
Reference
Typical dosage ranges (context only)
| Application | kg/m³ | ≈ Vf% |
|---|---|---|
| Industrial floors / slab-on-grade | 20–45 | 0.25–0.57 |
| Precast elements | 30–60 | 0.38–0.76 |
| Shotcrete / sprayed | 25–50 | 0.32–0.64 |
| Structural (load-bearing) | 40–100 | 0.51–1.27 |
Not design values. Steel hooked-end dosages run ~15–60 kg/m³ (up to ~100 structural). Beware sources quoting "0.2–0.6 kg/m³" — that is a synthetic PP fibre dosage, not steel.
The four anchor fibres
| Size | λ | Mass/fibre | Fibres/kg |
|---|---|---|---|
| 0.90 × 50 mm ≈ 55/50 | 55.6 | 0.2497 g | 4,005 |
| 0.90 × 60 mm ≈ 65/60 | 66.7 | 0.2996 g | 3,337 |
| 1.0 × 50 mm ≈ 50/50 | 50.0 | 0.3083 g | 3,244 |
| 1.0 × 60 mm ≈ 60/60 | 60.0 | 0.3699 g | 2,703 |
Same dosage means the same kilograms. Geometry changes aspect ratio, approximate fibre count and anchorage behaviour. Final performance depends on fibre type, concrete mix, dosage, testing and design approval.
Fibre counts are a straight-cylinder estimate (ρ = 7,850 kg/m³) and run about 4–5% above manufacturers' published figures — the hooks add negligible mass. Use the maker's published fibres/kg for exact ordering.
Reading hooked-end fibre codes
Hooked-end fibres are commonly named by aspect-ratio / length-in-mm — e.g. 65/60 means λ ≈ 65 and length 60 mm, so the wire diameter ≈ 60/65 ≈ 0.90 mm. The code describes geometry only; steel grade and hook design vary by manufacturer and are declared separately on the Declaration of Performance, so fibre count, λ and mass depend purely on the size code. Geometrically our 0.90 × 60 corresponds to a 65/60 code; suffixes such as "glued" or "loose" describe how the fibres are packaged, not their size.
How it works
The chain
- Volume = area × thickness (or entered directly)
- Required kg = volume × dosage
- Order kg = required × (1 + reserve%)
- Boxes = ⌈order kg / box weight⌉
- Pallets = ⌈boxes / (pallet net ÷ box weight)⌉
- Cost = delivered kg × price/kg
- Vf% = dosage / 7850 × 100
Worked example
A 500 m² floor, 15 cm thick, 25 kg/m³, 1.0×50 fibre at 25 kg/box:
- Volume = 500 × 0.15 = 75 m³
- Required = 75 × 25 = 1,875 kg
- Boxes = ⌈1,875 / 25⌉ = 75 boxes
- Pallets = 2 (1 full pallet + 27 boxes, at 1,200 kg ÷ 25 = 48 boxes/pallet)
- At 4.5 PLN/kg → 8,437.50 PLN (16.88 PLN/m²)
FAQ
How do I calculate steel fibre quantity for concrete?
Multiply concrete volume (m³) by the dosage (kg/m³) to get required fibre in kilograms. From area mode: volume = area × thickness. FibreCalc.com then rounds to whole boxes and pallets and estimates cost.
How much steel fibre is needed per m³ of concrete?
For hooked-end steel fibre, typical estimation dosages run roughly 20–40 kg/m³ for industrial floors, higher for precast or structural work. The exact value must come from your project specification or concrete technologist.
Does the calculator replace a structural designer?
No. FibreCalc.com estimates quantity, packaging and approximate cost only. Required dosage for structural performance is derived from EN 14651-tested residual strengths (fR1/fR3) by a qualified engineer — never from geometry.
What does EN 14889-1:2006 mean?
It is the European standard defining steel fibres for concrete and their CE-marking conformity. It sorts fibres into five Groups by manufacturing method — Group I is cold-drawn wire (the most common). "Hooked-end / anchor" describes the fibre shape, a separate declared characteristic; our products are cold-drawn wire (Group I) that is additionally hooked-end.
What is the difference between 0.90×50 and 1.00×60 steel fibre?
At the same dosage (kg/m³) the kilograms required are identical. What changes is geometry: aspect ratio, the number of fibres per kilogram, and technical positioning — a thinner/shorter fibre gives more pieces per kg (finer crack control); a longer one gives more anchorage.
Why do boxes and pallets round up?
You buy whole cardboard boxes and ship whole pallets. FibreCalc.com rounds required kilograms up to the next full box, then groups boxes into pallets, and uses the delivered (rounded) weight for cost — because that is what you actually pay for.
Can steel fibres replace rebar or mesh?
Sometimes steel-fibre-reinforced concrete can be designed as an alternative to traditional reinforcement, especially for industrial floors and slabs — but only with project-specific design, tested performance data, and the designer’s approval. FibreCalc.com only estimates quantity and packaging.
Related standards & design references
FibreCalc.com does not perform structural design. These are listed because they are commonly relevant to steel-fibre concrete — product compliance, testing, or design review.
Sourcing the fibre
Results assume EN 14889-1 hooked-end anchor fibre. Intermet supplies cold-drawn steel anchor fibre in 0.90–1.0 × 50–60 mm.
Need EN 14889-1 steel fibre? See Intermet