Industrial & warehouse sites
Perimeter fencing for factories, logistics yards and storage compounds.
High-Security Fence
358 Anti-Climb Fence
358 anti-climb fence, also known as 358 security mesh or prison mesh, is a welded steel panel fence with a 76.2 × 12.7 mm (3" × 0.5") aperture (width × height) that leaves no finger or toe holds for climbing.
- Mesh aperture
- 76.2 × 12.7 mm
- Wire diameter
- 4.0 mm
- Panel height
- 1.8 – 3.0 m
- Panel width
- 2.5 m
- Posts
- 60 × 60 / 80 × 80 mm SHS
- Finish
- Galvanized, powder or PVC coated
Complete systems with posts, clamp bars and security fixings. Custom sizes and RAL colours available.
What is 358 anti-climb fence?
The name 358 comes from the mesh's imperial dimensions: 3" × 0.5" openings welded from 8-gauge (4 mm) wire. The horizontal wires are only 12.7 mm apart — too close for fingers or shoe tips to find a hold, and too tight for most hand tools to cut through easily.
Each panel is welded from straight steel wires and fixed to the posts with a full-height clamp bar, giving a continuous barrier without gaps at the post. Despite its density, the mesh keeps clear sight lines for CCTV and patrols.
We supply complete systems — panels, posts, clamp bars and security fixings — in galvanized, powder-coated or PVC-coated finishes, with panel sizes made to your fence layout.
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358 Anti-Climb Fence Specifications
Standard configuration for panels, posts and fittings.
| Item | Standard specification |
|---|---|
| Mesh aperture | 76.2 × 12.7 mm (3" × 0.5"), width × height |
| Wire diameter | 4.0 mm (vertical and horizontal) |
| Panel height | 1800 / 2000 / 2100 / 2400 / 2500 / 3000 mm |
| Panel width | 2500 / 2515 mm |
| Panel type | Flat; V-bend reinforced panels on request |
| Posts | Square or rectangular hollow section: 60 × 60, 80 × 60, 80 × 80, 100 × 50, 100 × 100 mm; wall 2.5–3.0 mm |
| Post length | Fence height + approx. 700 mm for concrete footing; shorter with base plates |
| Post spacing | 2.44–2.52 m centres, matched to panel width |
| Clamp bar | Full-height slotted flat bar, 40 × 6 mm (40 × 4 / 40 × 5 mm available) |
| Fixings | M8 galvanized cup-head bolts at max. 400 mm centres, with shear nuts or anti-tamper nuts |
| Installation | Posts set in concrete or bolted on base plates |
| Surface finish | Hot-dip galvanized; galvanized + polyester powder coated; galvanized + PVC coated |
| Standard colours | Green RAL 6005, black RAL 9005; other RAL colours on request |
| Packing | Panels on steel or wooden pallets, film-wrapped with corner protection; posts bundled; fittings in cartons; custom packing on request |
Custom panel heights and widths, wire diameters (3.0–5.0 mm), post sections, V-bend panels, colours and packing are available. Send your fence length, height and site layout for a quotation.
Applications
Utilities & data centres
Controlled-access boundaries for substations, water works and data centres.
Correctional & government facilities
High-security enclosures where climb and cut resistance matter.
Transport infrastructure
Boundary fencing for railways, ports and airports.
Frequently Asked Questions
What does "358" mean?
It refers to the mesh dimensions in inches: a 3" × 0.5" aperture welded from 8-gauge wire, which is about 4 mm in diameter.
Why is 358 mesh hard to climb?
The horizontal wires are spaced only 12.7 mm apart, which is too narrow for fingers or shoe tips, so there are no climbing holds on the fence face.
What is the difference between 358 fence and 3D welded mesh fence?
3D welded mesh fence uses larger openings, typically 50 × 200 mm, for general boundaries. 358 fence has a much tighter mesh and is used where higher security is required.
Are posts and fittings included?
Yes. We supply complete systems including posts, clamp bars, bolts, post caps and base plates where required.
Can I choose the panel size and colour?
Yes. Panel height, width, wire diameter and RAL colour can be made to your specification.
What information do you need for a quotation?
Fence height, total length, finish and colour, post installation method, and the number of corners and gates.
