{"id":39124,"date":"2025-09-26T08:37:21","date_gmt":"2025-09-26T07:37:21","guid":{"rendered":"https:\/\/www.zaun.co.uk\/?post_type=blog&p=39124"},"modified":"2025-09-26T08:44:06","modified_gmt":"2025-09-26T07:44:06","slug":"weld-strength-vs-wire-thickness-358-mesh-fencing","status":"publish","type":"blog","link":"https:\/\/www.zaun.co.uk\/blog\/weld-strength-vs-wire-thickness-358-mesh-fencing\/","title":{"rendered":"Who\u2019s Really Protecting Your Perimeter?"},"content":{"rendered":"

Who\u2019s Really Protecting Your Perimeter?<\/h1>\n

Why weld strength matters more than just wire gauge<\/strong><\/p>\n

In the world of 358 mesh fencing<\/a>, not all panels are created equal. Many companies market panels by quoting wire thickness such as 3.9 mm, 4.0 mm, etc. But that metric alone doesn\u2019t tell the full story.<\/p>\n

We recently carried out a series of destruction tests<\/strong> on three 358 panels to compare real-world performance. The results show why relying on wire thickness alone can leave your perimeter exposed. We chose 358 as it is often seen as a High Security Fencing system and therefore a safe panel for many projects such as schools, transport and logistics, and commercial projects.<\/p>\n

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The Test Setup & Results<\/h2>\n

\"Weld<\/p>\n\n\n\n\n\n\n\n
Panel<\/th>\nOrigin<\/th>\nWire Diameter (mm)<\/th>\nFailure Load<\/th>\n% of Wire Tensile<\/th>\nResult<\/th>\n<\/tr>\n<\/thead>\n
Panel 1<\/td>\nUK<\/td>\n3.96 \u2013 3.99<\/td>\n4.9 kN<\/strong><\/td>\n~75%<\/td>\n\u2705 PASS<\/td>\n<\/tr>\n
Panel 2<\/td>\nTurkey<\/td>\n3.76 \u2013 3.77<\/td>\n2.4 kN<\/strong><\/td>\n36.64%<\/td>\n\u274c FAIL<\/td>\n<\/tr>\n
Panel 3<\/td>\nChina<\/td>\n3.86 \u2013 3.90<\/td>\n0.8 kN<\/strong><\/td>\n12.21%<\/td>\n\u274c FAIL<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Panels 2 and 3 are currently being sold into the UK market, despite failing at less than half, and in one case less than one-sixth, of the strength of the UK-manufactured panel. How do we know? Because the manufacturers approached us directly and sent these very samples as their best examples. They even told us which UK fencing companies they already supply.<\/p>\n

\u201cThese weren\u2019t random imports. The manufacturers sent us these samples as their best panels to prove quality. They still failed.\u201d<\/p><\/blockquote>\n

\"Weld<\/p>\n

\n

Why Weld Strength Is the Real Gatekeeper<\/h2>\n

\u201cA mesh fence is only as strong as its weakest weld.\u201d<\/p><\/blockquote>\n

1. The weakness is at the joints<\/h3>\n

In a mesh panel, the points where wires cross are welded. If those welds are poorly made, for example under-penetrated, porous, or inconsistent, they will fail well before the wire itself breaks. This is exactly what we saw in Panels 2 and 3.<\/p>\n

2. Wire thickness \u2260 panel strength<\/h3>\n

Thicker wire alone doesn\u2019t always guarantee security. In our test, the Chinese panel used almost the same wire size as the UK panel, but it still failed at just 0.8 kN<\/strong>. The reason, its welds could not sustain the load.<\/p>\n

3. Real-world loads demand reliable welds<\/h3>\n

From crowd loading to climbing attempts, fences experience repeated stresses and sudden impacts. If welds crack or shear under these loads, the perimeter is compromised. International standards<\/a> specify testing because weld quality is mission-critical.<\/p>\n

4. Quality control makes the difference<\/h3>\n

Strong panels require not just the right design, but also rigorous inspection and destructive sampling<\/strong>. That\u2019s what ensures every batch performs consistently, not just on paper.<\/p>\n

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What to Ask Your Supplier<\/h2>\n
    \n
  • Weld shear test data<\/strong> \u2013 not just wire diameter.<\/li>\n
  • Batch quality control<\/strong> \u2013 how often are destructive tests run?<\/li>\n
  • Standards compliance<\/strong> \u2013 do they meet BS 1722 requirements?<\/li>\n<\/ul>\n
    \n

    Watch the Test for Yourself<\/h2>\n

    It is not the size of the wire that keeps a site secure, it is the strength of the weld. In our tests, the UK panel withstood more than double the destructive load of the Turkish panel, and over six times that of the Chinese panel.<\/p>\n

    The Turkish panel had the thinnest wire (average 3.765 mm), around 5.3% thinner than the UK panel (average 3.975 mm). It performed better than the Chinese panel (average 3.88 mm), but still failed at less than 40% of the overall tensile strength. The Chinese panel failed at less than 13% of the overall tensile strength. The UK panel passed at 4.9 kN, equal to 75% of the tensile strength.<\/p>\n

    You can see the results for yourself in the video below:<\/p>\n