Strongbox® cold formed hollow sections
Strongbox® fully complies with the dimensional tolerances of the European standard for cold formed hollow sections, EN10219.
EN-Construction-Product-Strongbox cold formed hollow sections-default
EN-Construction-Product-Strongbox cold formed hollow sections | Key product features
Key product features
<p><strong>General hollow sections - Strongbox® 235</strong></p> <p>Key features</p> <ul> <li>Excellent quality, made with steel from a high quality production process</li> <li>Minimum strength of 235 MPa</li> <li>High levels of formability and, because the steel is fully-killed, excellent weldability</li> <li>Product subject to non-specific inspection and testing; with test report supplied</li> <li>Excellent consistent dimensional tolerances</li> <li>Excellent supply availability through approved stockholders</li> <li>Suitable for galvanising</li> </ul>
EN-Construction-Product-Strongbox cold formed hollow sections | Mechanical properties
Mechanical properties
<p><strong>Yield strength</strong></p> <p><strong>R<sub>eH</sub> min N/mm<sup>2</sup></strong></p> <p>T≤16mm</p> <p>235</p> <p>Strongbox® 235 hollow sections EN10219 S235JRH are subject to non-specific inspection and testing and are supplied with a test report type 2.2 to EN10204.</p>
EN-Construction-Product-Tubes-Strongbox-Dimensional tolerancesTSE
| Circular | Square/Rectangular | ||
|---|---|---|---|
| Outside dimension (D B and H) | ±1% with a min of ±0.50mm and a max of ±10mm |
Side length (mm) H,B < 100 100 ≤ H,B H,B > 200 |
Tolerance ±1% with a min of ±0.5mm ±0.8% ±0.6% |
| Thickness (T) | For D≤406.4mm T ≤ 5mm ±10% T > 5mm ±0.50mm |
T ≤ 5mm T > 5mm |
± 10% ±0.50mm |
| Out of roundness (O) | 2% for D/T < 100, where D/T ≥ 100 out-of-roundness tolerance to be agreed |
- | |
| Concavity/Convexity (independent tolerance on outside dimensions) |
- | Max 0.8% with a min of 0.5mm | |
| Squareness of side | - | 90º ± 1 | |
| External corner profile (radius need not be tangential to the sides) EN10219: Part 2 Table 3 |
- | T ≤ 6.0 6.0 < T ≤10.0 |
1.6T to 2.4T 2.0T to 3.0T |
| Twist (V) | - | 2mm plus 0.5mm/m length | |
| Straightness |
0.20% of total length & |
0.15% of total length & 3mm over any 1m length |
|
| Mass (M) ±6% on individual lengths |
±6% on individual lengths | ±6% on individual lengths |
|
| Length -0 +50mm | -0 +50mm | -0 +50mm | |
EN-Construction-Product-Strongbox cold formed hollow sections | Declaration of Performance
Download Strongbox 235 JRH Declaration of Performance document below:
EN-Construction-Product-Strongbox cold formed hollow sections-downloads
Downloads
EN-ConstructionEngineering-Download-EPD-Tata Steel Structural hollow sections
Tata Steel EPD structural hollow sections
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