How many rows of straining wire do I need for chain link fencing?

For fences up to 1.2m high, use 3 rows of straining wire (top, middle and bottom). For fences 1.5m-1.8m, use 3-4 rows. For 2m+ fences, use 4-5 rows. The straining wire provides the tension framework that the chain link mesh is tied to — it runs between strainer posts and is tensioned with adjustable tensioners.

What is the difference between strainer and intermediate posts?

Strainer posts (also called straining posts) are the heavy-duty posts at ends, corners and gates. They take the full tension of the straining wire and are typically 100mm diameter or 80×80mm angle iron. Intermediate posts are lighter (38-50mm diameter) and simply support the mesh between strainers. They are spaced at 2.7-3m intervals.

What length mesh rolls come in for chain link fencing?

Standard chain link mesh rolls in the UK come in 25m lengths for domestic use. Trade/commercial rolls are available in 12.5m and 25m lengths. The mesh is typically galvanised for corrosion resistance, with PVC-coated options (green or black) available for a neater appearance at extra cost.

How deep should chain link fence posts be set?

Strainer posts should be set 600mm deep in concrete for fences up to 1.8m. For 2m fences or exposed sites, go to 750mm. Intermediate posts need 450-600mm depth. The concrete should be at least 300mm diameter around the post. Allow 24 hours for concrete to set before tensioning the wire.

Can I use chain link fencing for security purposes?

Yes, chain link is widely used for security. For security applications, use 3.55mm gauge mesh at 2m+ height with 3-strand barbed wire on angled arms. For high-security, weld mesh panels (358 mesh) may be more appropriate. Chain link offers good visibility which can deter intruders and allow CCTV coverage.

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Chain Link Fence Calculator

Calculate mesh rolls, straining wire, strainer posts and intermediate posts for chain link fencing. Standard UK sizes and specifications.

Total Fence Length

Total run of chain link fencing

Mesh Height

Height of the chain link mesh

Mesh Gauge

Wire diameter — heavier for security

Number of Corners

Each corner needs a strainer post

Number of Ends

Usually 2 (start and finish)

Price Per Mesh Roll (optional)

Per 25m roll

Price Per Strainer Post (optional)

Price Per Intermediate Post (optional)

How We Calculate This

This calculator works out the mesh rolls, straining wire, posts and fittings needed for a chain link fence installation. It accounts for strainer posts at ends and corners, plus intermediate support posts at regular intervals.

The formula

Mesh rolls = Fence length ÷ Roll length (rounded up)
Strainer posts = Number of ends + Number of corners
Intermediate posts = (Fence length ÷ Spacing) - 1
Straining wire = Fence length × Number of rows

For a 50m perimeter with 4 corners and 3 rows of straining wire: 2 rolls of 25m mesh, 4 strainer posts, ~15 intermediate posts at 3m spacing, and 150m of straining wire.

Installation tips

Always install strainer posts first and allow concrete to cure
Tension straining wire from one strainer post to the next
Unroll mesh along the fence line and tie to straining wire
Use ring-top ties or hog rings at 300mm intervals along each wire

Frequently Asked Questions

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Last updated: March 2026

All calculations are estimates. Verify with your supplier.