Steel Reinforcement Mesh Sheets, Weight & Cost Estimator – All Mesh Types – Updated 2026
Calculate the number of sheets, total weight, and 2026 supply cost of steel reinforcement mesh for a concrete slab or floor. Choose any standard A-type, B-type, or C-type mesh designation. Covers laps and wastage automatically.
The table below gives the full specification for all standard A-type, B-type, and C-type steel fabric reinforcement sheets per BS 4483:2005+A1:2014, including bar diameters, spacings, cross-sectional areas, and weights. Sheet size: 4.8m × 2.4m (standard UK). Grade: B500B (500 N/mm² characteristic yield strength).
| Designation | Type | Main Bar Ø (mm) | Main Pitch (mm) | Cross Bar Ø (mm) | Cross Pitch (mm) | As,main (mm²/m) | As,cross (mm²/m) | Weight (kg/m²) | Weight / Sheet (kg) | Typical Use |
|---|---|---|---|---|---|---|---|---|---|---|
| A98 | Square | 6 | 200 | 6 | 200 | 283 | 283 | 1.54 | 17.7 | Lightweight, crack control |
| A142 | Square | 6 | 200 | 6 | 200 | 283 | 283 | 2.22 | 25.6 | Light domestic floor slabs, paths |
| A193 | Square | 7 | 200 | 7 | 200 | 385 | 385 | 3.02 | 34.8 | Lightly loaded slabs |
| A252 | Square | 8 | 200 | 8 | 200 | 503 | 503 | 3.95 | 45.5 | Standard domestic / light commercial floor slab |
| A393 | Square | 10 | 200 | 10 | 200 | 785 | 785 | 6.16 | 71.0 | Heavier loaded slabs, industrial floors |
| B196 | Structural | 7 | 100 | 7 | 200 | 385 | 193 | 3.05 | 35.1 | One-way spanning slabs |
| B283 | Structural | 8 | 100 | 8 | 200 | 503 | 252 | 4.53 | 52.2 | One-way spanning slabs |
| B385 | Structural | 9 | 100 | 9 | 200 | 636 | 318 | 6.16 | 71.0 | One-way slabs, medium loads |
| B503 | Structural | 10 | 100 | 10 | 200 | 785 | 393 | 8.14 | 93.8 | Structural suspended slabs |
| B785 | Structural | 12 | 100 | 8 | 200 | 1131 | 252 | 10.90 | 125.6 | Heavily loaded structural slabs |
| B1131 | Structural | 16 | 100 | 8 | 200 | 2011 | 252 | 15.69 | 180.8 | Transfer slabs, heavy loads |
| C283 | Long | 8 | 100 | 6 | 400 | 503 | 71 | 3.73 | 43.0 | Road slabs, main bars in one direction |
| C385 | Long | 9 | 100 | 6 | 400 | 636 | 71 | 5.34 | 61.5 | Road slabs, pavement |
| C503 | Long | 10 | 100 | 6 | 400 | 785 | 71 | 7.09 | 81.7 | Road slabs, ground slabs |
| C636 | Long | 12 | 100 | 6 | 400 | 1131 | 71 | 9.82 | 113.2 | Heavy road slabs |
| C785 | Long | 12 | 100 | 8 | 200 | 1131 | 252 | 11.62 | 133.9 | Heavy structural slabs |
All weights are for B500B deformed bars (characteristic yield strength 500 N/mm²) to BS 4483. Sheet weight = weight per m² × 11.52 m² (standard 4.8×2.4m sheet). Cross-sectional areas are nominal values; actual values may vary slightly due to bar diameter tolerances.
The table below provides indicative 2026 supply-only prices for standard BS 4483 steel mesh reinforcement in the UK, by mesh type and region. Prices are per tonne and per standard 4.8×2.4m sheet, excluding delivery and VAT. Steel prices fluctuate with commodity markets — obtain live quotes from your local steel stockholder or merchant for accurate pricing.
| Mesh / Grade | Per Tonne (SE) | Per Sheet A252 (SE) | N Ireland / Scotland | North / Wales | Midlands / SW | South East | Greater London |
|---|---|---|---|---|---|---|---|
| A142 (2.22 kg/m²) | £820–£1,050/t | £19–£24/sheet | £780–£995/t | £800–£1,020/t | £810–£1,030/t | £820–£1,050/t | £940–£1,200/t |
| A193 (3.02 kg/m²) | £820–£1,050/t | £29–£37/sheet | £780–£995/t | £800–£1,020/t | £810–£1,030/t | £820–£1,050/t | £940–£1,200/t |
| A252 (3.95 kg/m²) | £820–£1,050/t | £37–£48/sheet | £780–£995/t | £800–£1,020/t | £810–£1,030/t | £820–£1,050/t | £940–£1,200/t |
| A393 (6.16 kg/m²) | £820–£1,050/t | £58–£74/sheet | £780–£995/t | £800–£1,020/t | £810–£1,030/t | £820–£1,050/t | £940–£1,200/t |
| B503 (8.14 kg/m²) | £830–£1,060/t | £80–£100/sheet | £788–£1,007/t | £810–£1,031/t | £820–£1,041/t | £830–£1,060/t | £952–£1,215/t |
| B785 (10.90 kg/m²) | £830–£1,060/t | £101–£130/sheet | £788–£1,007/t | £810–£1,031/t | £820–£1,041/t | £830–£1,060/t | £952–£1,215/t |
| C503 (7.09 kg/m²) | £830–£1,060/t | £68–£87/sheet | £788–£1,007/t | £810–£1,031/t | £820–£1,041/t | £830–£1,060/t | £952–£1,215/t |
| Mesh Type | kg/m² | N Ireland / Scot. | North / Wales | Midlands / SW | South East | Greater London |
|---|---|---|---|---|---|---|
| A142 | 2.22 | £1.73–£2.21/m² | £1.78–£2.26/m² | £1.80–£2.29/m² | £1.82–£2.33/m² | £2.09–£2.66/m² |
| A193 | 3.02 | £2.36–£3.00/m² | £2.42–£3.08/m² | £2.45–£3.11/m² | £2.48–£3.17/m² | £2.84–£3.62/m² |
| A252 | 3.95 | £3.08–£3.93/m² | £3.16–£4.03/m² | £3.20–£4.07/m² | £3.24–£4.15/m² | £3.71–£4.74/m² |
| A393 | 6.16 | £4.81–£6.13/m² | £4.93–£6.28/m² | £4.99–£6.35/m² | £5.05–£6.46/m² | £5.79–£7.39/m² |
| B503 | 8.14 | £6.41–£8.20/m² | £6.59–£8.39/m² | £6.67–£8.47/m² | £6.76–£8.63/m² | £7.75–£9.89/m² |
| B785 | 10.90 | £8.59–£10.98/m² | £8.83–£11.24/m² | £8.94–£11.35/m² | £9.05–£11.55/m² | £10.38–£13.24/m² |
| Item | Typical Cost (2026) | Notes |
|---|---|---|
| Mesh delivery (per load) | £60–£180 | Varies by distance and quantity; often free above a minimum order value (typically £300–£500); sheets are 4.8m long — ensure vehicle access |
| Cover spacers / mesh chairs | £0.06–£0.18 each | Plastic or wire spacers to maintain correct cover; standard: 25mm, 35mm, 40mm, or 50mm chairs; approximately 3–5 per m² |
| Binding wire (tying wire) | £8–£20 per roll (1.6kg) | Soft annealed black wire for tying mesh laps and chairs; one roll covers approximately 50–80 m² |
| Bar chairs / wire spacers (1000 pack) | £45–£90 | Economy pack for medium–large slabs; 25mm or 40mm standard heights; specify correct height for nominal cover |
| Mesh laying labour (fix only) | £3–£7/m² | Fix and tie mesh in position; larger slabs at the lower end; includes cutting, lapping, and setting cover spacers |
| Angle grinder (cutting mesh) | Hire £15–£30/day | For cutting A393 / B-type mesh; A142 and A252 can often be cut with bolt croppers |
| Edge trim / stop board | £3–£6/m run | Timber or steel edge form at slab perimeter; contains concrete and defines slab edge |
| DPM (damp proof membrane) | £0.40–£1.20/m² | 1200-gauge polythene below ground floor slabs; laid before mesh; essential for moisture control |
| EPS insulation (below slab) | £5–£16/m² | 100mm EPS 100 or PIR; Part L compliance for heated floors; mesh sits on top of insulation via chairs |
| Rebar (supplementary bars) | £0.80–£1.60/kg | T12–T20 bars at slab edges, re-entrant corners, and openings where mesh alone is insufficient |
| Structural engineer’s design | £400–£2,000+ | Required for suspended slabs, heavily loaded ground slabs, or where structural design is needed to confirm mesh grade |
A252 is a square mesh fabric reinforcement designation under BS 4483, consisting of 8mm diameter high-yield deformed bars (B500B, 500 N/mm² characteristic yield strength) welded at 200mm centres in both the main (longitudinal) and cross (transverse) directions. It is the most widely specified mesh grade for domestic and light commercial concrete floor slabs in the UK — standard for reinforced ground floor slabs, suspended concrete floors, and moderately loaded industrial slabs. The “A” prefix indicates a square mesh (equal bar spacing and usually equal bar diameters in both directions), the “2” indicates approximately 200mm bar pitch, and “52” encodes the cross-sectional area per metre width (503 mm²/m for 8mm bars at 200mm centres).
Steel fabric reinforcement is manufactured to BS 4483:2005+A1:2014 in standard sheet sizes — the most common UK sheet is 4.8m × 2.4m = 11.52 m². All standard A-type, B-type, and C-type designations are available from major UK steel stockholders and builders’ merchants. B500B (high-yield) is the standard steel grade for all fabric reinforcement in UK construction; mild steel (B500A) mesh is occasionally encountered but rarely specified for new work.
The correct mesh grade is determined by the structural design of the slab — specifically by the required cross-sectional area of steel per metre width (As,req) in both directions. Common UK guidance for domestic applications:
Mesh reinforcement resources: BSI – BS 4483 Steel Fabric | Steel Reinforcement Institute (SRI) | The Concrete Centre | Institution of Structural Engineers
A252 mesh consists of 8mm diameter B500B deformed bars welded at 200mm centres in both directions. It provides a cross-sectional area of 503 mm²/m in both the main and cross directions. The standard sheet (4.8m × 2.4m) weighs approximately 45.5 kg and covers 11.52 m² at 3.95 kg/m².
The standard UK sheet size for fabric reinforcement is 4.8m × 2.4m = 11.52 m². Long sheets (6.0m × 2.4m) are available for larger pours to reduce laps. Smaller sheets (3.6m × 2.0m) are available for restricted access. The sheet size affects the number of laps and the overall wastage percentage.
Mesh sheets must overlap at joints to transfer force between sheets. The required lap length is typically 2 bar spacings = 400mm for A252 (i.e. two squares of mesh overlap at each joint). This means each lap wastes approximately 0.4m of mesh width. For a 5m wide slab with a 4.8m wide sheet, a 0.2m strip from a second sheet is used plus the lap — a significant wastage factor on narrow slabs.
As a practical rule of thumb, add 10% to the net slab area to allow for lap wastage when ordering A252 mesh. This covers typical rectangular slabs with 2–4 sheet laps. For irregular shapes, many cuts, or where the engineer specifies longer laps (e.g. 500mm for B500B Class C ductility), allow 15–20%.
All UK fabric reinforcement is manufactured from B500B high-yield steel (characteristic yield strength fyk = 500 N/mm²) to BS 4449:2005+A3:2016, welded at the intersections to form the mesh. B500B has a minimum elongation at fracture of 5% (Class B ductility), suitable for most structural applications. B500C (Class C, higher ductility) is specified for seismic design and some special structural applications.
The concrete cover to the mesh must meet the BS 8500 exposure class requirements: typically 25mm nominal cover (cnom) for XC1 interior slabs and 35–45mm for external or exposed slabs. Cover spacers (chairs) are placed at approximately 800mm–1,000mm intervals to maintain the correct cover throughout the pour. Never allow mesh to touch the formwork or DPM.
A252 (503 mm²/m) vs A393 (785 mm²/m): A393 provides 56% more steel per metre width than A252. For the same slab thickness and loading, A393 gives lower crack widths and better performance under heavier loads. A252 is standard for domestic ground floors; A393 is typically specified for commercial, industrial, and more heavily loaded slabs. The weight premium for A393 over A252 is approximately 56% — reflected directly in the cost.
A252 mesh is typically placed in the bottom third of the slab thickness for ground-bearing slabs (resisting sagging bending moments from sub-grade reaction). For suspended slabs, mesh may be required at both top and bottom. Position mesh using cover spacers before pouring concrete, and tie laps with binding wire. Avoid walking on mesh without a kneeling board to prevent displacement during the pour.
Fabric (mesh) reinforcement is faster and cheaper to fix than individually cut and tied loose bars, but offers less flexibility in bar arrangement and spacing. Loose bar reinforcement is specified where the structural design requires variable bar spacings, hook or bend details, or where the slab geometry makes sheet cutting impractical. For standard domestic floor slabs, mesh is almost universally used in the UK in 2026.
Steel reinforcement prices are closely linked to global steel commodity prices and can fluctuate significantly. In 2026, A252 mesh costs approximately £820–£1,050/tonne in South East England — broadly stabilised after the extreme price spikes of 2021–2022. Always obtain a live quote from your local steel stockholder or merchant rather than relying on historic prices.
A standard A252 sheet (4.8m × 2.4m) weighs approximately 45.5 kg — above the HSE recommended maximum manual handling weight of 25 kg. Two people are required to handle and place A252 sheets safely. Heavier mesh types (B785 at 125 kg/sheet; B1131 at 181 kg/sheet) require mechanical handling. Always assess manual handling risk before placing mesh on site.
The mesh grade for any structural slab must be confirmed by a Chartered Structural Engineer. This calculator provides quantities and cost estimates only — it does not replace structural design. The correct mesh depends on the slab span, imposed loads, slab thickness, concrete grade, and deflection limits specified by the engineer. Never upgrade or downgrade mesh without engineering approval.
A252 is a square fabric reinforcement mesh designation to BS 4483, consisting of 8mm diameter high-yield deformed steel bars (B500B, 500 N/mm² yield strength) welded in a grid at 200mm centres in both the longitudinal (main) and transverse (cross) directions. The designation “A252” breaks down as: A = square mesh (equal spacing both ways); 2 = approximately 200mm bar pitch; 52 = encodes the cross-sectional area. It provides As = 503 mm² per metre width in both directions and weighs 3.95 kg/m². Standard sheets are 4.8m × 2.4m = 11.52 m², weighing approximately 45.5 kg per sheet.
Each standard A252 sheet (4.8m × 2.4m) covers 11.52 m² of slab. So the number of sheets needed = slab area (m²) ÷ 11.52 = slab area × 0.0868 sheets per m². For example, a 40 m² slab requires 40 ÷ 11.52 = 3.47 sheets — round up to 4 sheets (always round up to whole sheets). Add a 10% lap and wastage allowance: 40 × 1.10 ÷ 11.52 = 3.82 — round up to 4 sheets. Use the calculator above for quick estimates.
In South East England in 2026, A252 mesh costs approximately £820–£1,050 per tonne for supply (excl. delivery and VAT). Per standard sheet (4.8m × 2.4m, 45.5 kg): approximately £37–£48 per sheet. Per m² of slab: approximately £3.24–£4.15/m². Northern England and Scotland are typically 5–10% cheaper; Greater London 10–20% more expensive. Steel prices fluctuate with commodity markets — always get a live quote from your local steel stockholder. Delivery charges of £60–£180 typically apply for smaller orders.
All three are square mesh types (A-type) with equal bar spacing in both directions, but different bar diameters giving different cross-sectional steel areas and weights: A142 has 6mm bars at 200mm centres, providing 283 mm²/m and weighing 2.22 kg/m² — used for light crack control and non-structural applications. A252 has 8mm bars at 200mm centres, providing 503 mm²/m and weighing 3.95 kg/m² — standard for domestic floor slabs. A393 has 10mm bars at 200mm centres, providing 785 mm²/m and weighing 6.16 kg/m² — for heavier commercial and industrial slabs. A252 is approximately 78% heavier and stronger than A142; A393 is approximately 56% heavier and stronger than A252.
For a standard domestic ground floor slab (150mm thick, standard two-storey dwelling, category A residential imposed load 1.5–2.0 kN/m²), A252 mesh is the standard specification in the UK. It is widely referenced in the NHBC Standards (Chapter 5.2) and Building Regulations Approved Document A for domestic ground-bearing floor slabs. Where the building is larger or more heavily loaded, a structural engineer should confirm whether A252 is adequate or whether A393 or a designed mesh is required. Always confirm the mesh specification with the structural engineer’s drawings or the building regulations submission.
The total weight of A252 mesh = slab area (m²) × 3.95 kg/m² × number of layers × (1 + lap fraction). For a single-layer 40 m² slab with 10% laps: 40 × 3.95 × 1 × 1.10 = 173.8 kg = approximately 4 sheets × 45.5 kg = 182 kg (difference is rounding up to whole sheets). For the total weight per order: multiply the number of sheets by the sheet weight (45.5 kg for a standard 4.8×2.4m sheet). The calculator above does this automatically.
For A252 (B500B, fyk = 500 N/mm²), the minimum lap length for fabric reinforcement under BS 4449 and BS EN 1992-1-1 (EC2) is generally 2 bar spacings minimum = 400mm (two mesh squares overlap) for Class B ductility steel in tension zones. Some structural specifications and NHBC Standards require a longer lap — 500mm is common. Always follow the structural engineer’s specification for lap length; the 400mm (2-square) minimum is a code minimum, not always sufficient for all design conditions. Laps must be staggered so that adjacent sheet joints do not coincide.
Yes — A252 mesh is a suitable reinforcement for a domestic concrete driveway slab. For a standard domestic driveway (cars up to 3.5t): 150mm RC30 (C30/37) concrete with A252 mesh in the lower third (cover spacers at 25–35mm), on 150mm compacted MOT Type 1 hardcore, with a DPM below the concrete. Lay mesh with a minimum 400mm lap, tie with binding wire, and ensure the mesh is not displaced during the pour. Power-float finish for best durability. For heavier vehicles (vans, lorries), 200mm with A393 or a designed slab is required.
A252 mesh resources UK 2026: BSI – BS 4483 / BS 4449 | The Concrete Centre | Institution of Structural Engineers | NHBC Standards | Steel Reinforcement Institute