Q257 Reinforcing Steel Mesh
Square (Q-type) welded fabric with 7 mm longitudinal wires at 150 mm pitch — delivering approximately 2.57 cm²/m cross-section in both directions. Conforming to DIN 488-4 and EN 10080, Q257 suits lightly to moderately loaded slabs, ground-bearing floors, and wall panels where uniform biaxial reinforcement is required.
Q257 Mesh: Technical Specification
Q257 belongs to the square (Q) mesh family defined in DIN 488-4, in which longitudinal and transverse wires share identical geometry — giving equal reinforcement area in both principal directions. The designation “257” encodes the nominal cross-sectional area per metre: 2.57 cm²/m (257 mm²/m).
Wire diameter is nominally 7.0 mm, spaced at 150 mm pitch in both directions. At this diameter, the unit weight per linear metre of a single wire is 0.617 × (7/10)² ≈ 0.302 kg/m, and the mesh sheet weight works out to roughly 4.50 kg/m² of panel area — a convenient benchmark for freight and reinforcement scheduling.
Standard panel dimensions supplied are approximately 6.0 × 2.3 m (other cut sizes available to order). The steel grade is B500A or B500B to EN 10080 — minimum 500 MPa characteristic yield strength — with the wires welded at every crossing point by electrical resistance welding to form a rigid grid.
Dimensional and Weight Summary
| Parameter | Value |
|---|---|
| Wire diameter (longitudinal & transverse) | 7.0 mm (nominal) |
| Wire pitch (both directions) | 150 mm |
| Cross-section per metre (As) | ≈ 2.57 cm²/m (257 mm²/m) |
| Approx. sheet weight | ≈ 4.50 kg/m² |
| Standard sheet size | 6.0 × 2.3 m (13.8 m²/sheet) |
| Steel grade | B500A / B500B to EN 10080 |
| Standard | DIN 488-4, EN 10080 |
| Weld type | Electrical resistance welding |
Typical Applications for Q257 Mesh
Where to specify Q257 welded fabric in residential, commercial, and infrastructure projects.
Ground-Bearing Slabs
Q257 provides the minimum reinforcement ratio required by Eurocode 2 (EN 1992-1-1) in lightly loaded ground-floor slabs (e.g. 150–180 mm thickness), controlling shrinkage cracking and distributing point loads.
Reinforced Wall Panels
Precast and cast-in-situ concrete walls benefit from Q257’s balanced biaxial grid for temperature and shrinkage crack control in panels up to ~200 mm thick.
Pavement & Hardstanding
Industrial floors, yard slabs, and road-base concrete frequently specify Q257 as a practical, cost-effective crack-distributing layer where structural flexural demands are modest.
Topping Slabs
Composite floor toppings over precast units or profiled steel deck benefit from Q257’s light weight (≈ 4.5 kg/m²) and ease of placement between props.
Retaining Structures
Secondary face reinforcement in retaining walls — complementing main vertical bars — is commonly satisfied by Q257 or Q335, depending on the design crack-width limits.
Precast Elements
Lattice-girder filigree slab manufacturers use Q-type mesh for the in-situ topping pour; Q257 suits the thinner topping layers of 60–80 mm.
Lattice Girders →Standards, Certification, and Export Documentation
Q257 mesh supplied by Steel Rebar Germany is manufactured to DIN 488-4 (the German reinforcing steel mesh standard) and the harmonised European standard EN 10080. The steel wire conforms to grade B500A (normal ductility, k ≥ 1.05, Agt ≥ 2.5%) or B500B (high ductility, k ≥ 1.08, Agt ≥ 5.0%), each with a characteristic yield strength of 500 MPa.
Every shipment is accompanied by an EN 10204 Type 3.1 Mill Test Certificate (MTC) — issued by an accredited inspection body — which records chemical composition, mechanical test results (Re, Rm, Agt), and dimensional measurements traceable to the production heat. Additional export documents available include:
- Certificate of Origin (for customs and duty-rate purposes)
- CE Declaration of Performance (DoP) referencing EN 10080 / Annex ZA
- Packing list with bundle weights, sheet counts, and container load plan
- Seaworthy packaging — wire-bound bundles, moisture-inhibiting wrapping for sea freight
For projects in jurisdictions that reference Eurocode 2 (EN 1992-1-1), the Q257 As value (2.57 cm²/m) integrates directly into reinforcement design tables without conversion. Buyers in markets using national annexes or equivalent local standards should verify direct equivalence with their structural engineer — we supply comparative data on request.
Standards & Certification →How We Supply Q257 Mesh
From specification to port — a straightforward export process.
Specify Your Requirement
Share your project drawings or mesh schedule — grade, quantity (m² or tonnes), sheet size, and destination port. Use our quote form or email directly.
Receive a Detailed Quote
We return a line-item quotation covering unit price, packing, freight options (FCL/LCL/break-bulk), and estimated lead time within one business day.
Production & Inspection
Mesh is produced to order or supplied from held stock. MTCs are prepared and reviewed before release. Third-party inspection can be arranged on request.
Export & Documentation
Bundles are palletised or loose-loaded into containers (typically 20 ft or 40 ft). Full export documentation is prepared and forwarded electronically ahead of vessel departure.
Compare Q-Type Mesh Grades
Choose the right square mesh for your design cross-section requirement.
| Grade | Wire Dia (mm) | Pitch (mm) | As (cm²/m) | Approx. Weight (kg/m²) |
|---|---|---|---|---|
| Q257 (this page) | 7.0 | 150 | 2.57 | ≈ 4.50 |
| Q335 | 8.0 | 150 | 3.35 | ≈ 5.93 |
| Q424 | 9.0 | 150 | 4.24 | ≈ 7.51 |
| Q524 | 10.0 | 150 | 5.24 | ≈ 9.27 |
| Q636 | 9.0 | 100 | 6.36 | ≈ 11.25 |
All grades to DIN 488-4 / EN 10080. See the full mesh sizes guide for R-type (rectangular) and bespoke panels. Back to mesh overview →
Frequently Asked Questions — Q257 Mesh
What does the designation “Q257” mean?
What steel grade is Q257 mesh manufactured in?
Can Q257 mesh be cut to custom sizes?
How is Q257 packaged for sea freight?
Is a Mill Test Certificate provided with Q257 shipments?
Source German-standard rebar with full export documentation
Tell us your Q257 mesh specification and destination port — we’ll respond with a detailed quotation.
