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Pro-Strain System
A high-performance alternative to traditional timber strainers
Tornado’s Pro-Strain® system is an advanced steel straining solution engineered to outperform conventional wooden strainers. Developed in collaboration with leading UK agricultural fencing contractors.
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Pro-Strain’s registered designs eliminate the drawbacks of timber, including short service life and reliance on chemical treatments, while providing a robust galvanised steel structure that stands up to challenging ground conditions and long-term use.
Key Benefits
Why Pro-Strain
Six structural advantages that make Pro-Strain the working contractor’s default for steel strainers.
01
Adapts to varied terrain
Handles uneven topography and a wide range of ground conditions without redesign.
02
Lightweight components
Easier transport and installation, especially on difficult-access sites.
03
Fast, simple install
Minimal tools required, no chainsaws needed.
04
Manual or machine drive
Straining posts and pegs go in by hand or post knocker.
05
Adjustable, pre-loadable
Full pre-loading minimises movement when the fence is tensioned.
06
Compatible with all intermediates
Works with steel and timber intermediate posts.
Strainers and Struts
Manufactured from heavy-duty galvanised steel tube, Pro-Strain straining posts and strut pegs deliver exceptional strength and durability. Each post includes bolted heel and breast plates, with standard, extra-large or plate-free options depending on ground conditions.
Struts connect to the post and peg using an adjustable brace, or can be configured as a box brace linking two strainers, providing a stable, adaptable solution across varied terrain.
Technical Spec
Pro-Strain component specifications
Galvanised steel throughout, drilled and dimensioned for repeatable, professional install.
| Component | Material & dimensions | Notes |
|---|---|---|
| Straining / turning post | 89mm × 3mm OD galvanised steel tube | Pre-drilled 13.5mm holes for heel/breast plates and a 12mm hole for the strut coupler. Flexible install tailored to soil type and load. |
| Strut | 48mm × 3.2mm OD galvanised steel tube | Engineered for long-term strength and stability. |
| Strut peg | 89mm × 3mm galvanised steel tube, 1m length | Pre-drilled 13.5mm and 12mm holes for plate and coupler attachment. |
| Couplers and adjuster | Two-part coupler system | Large coupler connects strut to peg; small coupler fits the adjustable brace and locks into the straining post; adjuster pre-loads the system before tensioning. |
| Heel and breast plates | 250 × 250 × 4mm galvanised steel, M12 × 110mm bolts | Heel plate: rear lower holes. Breast plate: front upper holes. Additional breast plate at front of strut peg. Soft ground: 350 × 250 × 4mm option for more surface area. |
Shear-by-design. Bolts are designed to shear if they hit immovable underground obstacles. In chalky ground, omit the heel plate to avoid interference while retaining the breast plate to prevent rotation.
Applications
Where Pro-Strain works
Agricultural fencing
Livestock containment
Conservation & wildlife
Infrastructure & boundary
Dog exercise & activity fields
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