Crimped Spear Garrison Fencing Shocking 7 Hidden Risk Point

Crimped Spear Garrison Fencing has become a go-to choice for serious perimeter security around homes, schools, warehouses and industrial sites. From the street it looks like a simple black steel fence – neat vertical uprights with crimped spear tops and strong horizontal rails. But behind each panel are design decisions that determine whether your fence really protects you, or becomes an expensive liability after a few years in the weather.

POLYMETAL designs Crimped Spear Garrison Fencing for demanding, high-use environments. By controlling the steel grade, rail frame size, upright dimensions, post section, bracket design and powder coating system, POLYMETAL helps you avoid the hidden mistakes that only show up when people try to climb, vehicles bump the fence, or the first heavy storm hits.

With supporting hardware like 65 × 65 × 2.0 mm posts in 2.7 m and 3.0 m lengths, universal security brackets (all screws from the secure side), X-Tend wire mesh panels, and steel powder-coated caps instead of cheap plastic and painted self-drilling screws, the system is engineered as a complete security package – not just a loose collection of panels.

7 Hidden Risk Points POLYMETAL Exposes

1. Under-spec rail frames – Rails that are too light twist and bow between posts. Thin 30 × 30 mm or weakly rolled profiles can sag under wind and climbing loads. POLYMETAL uses 40 × 40 mm, 45 × 45 mm and 50 × 50 mm rail frames matched to fence height and bay width so panels stay straight and rigid.
2. Weak uprights and loose crimped spears – Light uprights or poorly formed spear tops bend easily and can even snap at the crimp. POLYMETAL uses 16 × 16 mm, 25 × 25 mm and 30 × 30 mm uprights with controlled wall thickness and precise crimping so the spear head remains tight and difficult to deform.
3. Wrong upright spacing – Too wide and people can get a foot or hand through; too tight and you add unnecessary cost without more security. POLYMETAL keeps a disciplined 100 mm upright spacing to balance climb resistance, visibility and material efficiency.
4. Undersized posts and brackets – Posts that are too small for a 2100 mm high fence will flex and loosen at ground level. Cheap brackets with exposed screws invite tampering. POLYMETAL combines 60 × 65 mm, 75 × 75 mm, 80 × 80 mm and 100 × 100 mm posts with universal security brackets so all screws are fixed from the secure side – no “left” or “right”, and no easy access for intruders.
5. Poor corrosion protection and cheap caps – Thin powder coating over bare steel or plastic caps that crack in the sun lead to rust streaks and water ingress. POLYMETAL uses hot-dip galvanized or pre-galvanized steel with black polyester powder coating, finished with tight-fitting steel caps on 65 × 65 mm posts for long-term corrosion resistance.
6. Low-grade accessories and packaging – Uncoated screws and bare rails damage quickly during transport and storage, so your “new” fence looks used before installation. POLYMETAL supplies painted self-drilling screws and protects every panel with foam around the top and bottom rail, plus plastic wrapping every two panels so they stay clean and pristine, even if stored for months.
7. No long-term experience behind the product – Many cheap systems are copied and changed without real field testing. With more than 25 years in the fencing business, POLYMETAL designs Crimped Spear Garrison Fencing to perform for the long term, not just to look good in a catalogue. Paying a little more upfront to get the right product is often the most cost-effective decision you can make.

These seven risk points explain why two Crimped Spear Garrison Fencing lines that look similar from the road can behave completely differently under real-world stress.

What Crimped Spear Garrison Fencing Actually Does

A serious Crimped Spear Garrison Fencing system has to do much more than “stand in a line”:

• Deter and delay intruders with a 1800–2100 mm high, spear-topped barrier
• Make climbing difficult with closed 100 mm upright spacing and sharp crimped heads
• Stay straight and stable under wind, leaning and accidental impact
• Anchor securely into concrete with correctly sized posts and footing depth
• Integrate with gates, corners and step-downs without weak points
• Maintain a clean, professional black finish that supports your site’s image

If any of these functions fails, you end up with gaps, bending panels and a “security fence” that is only secure on paper.

POLYMETAL Crimped Spear Garrison Fencing – Design Elements

To keep the system consistent and strong, POLYMETAL standardises key design parameters:

• Fence heights: 1200 mm, 1500 mm, 1800 mm, 2100 mm (with 2100 mm the most common high-security option)
• Fence widths: typically 2400 mm and 3000 mm panel lengths for efficient installation
• Rail frames: 40 × 40 mm, 45 × 45 mm, 50 × 50 mm square rails
• Uprights: 16 × 16 mm, 25 × 25 mm, 30 × 30 mm square verticals with crimped spear tops
• Upright spacing: 100 mm centre-to-centre
• Posts: 60 × 65 mm, 75 × 75 mm, 80 × 80 mm and 100 × 100 mm posts, commonly 2400 mm or longer for 2100 mm high panels
• Accessories: universal security brackets, 65 × 65 steel caps, painted self-drilling screws, foam-protected rails and plastic-wrapped bundles

Instead of mixing random sizes panel by panel, you can choose from clear POLYMETAL model lines that match your security level and budget.

POLYMETAL Crimped Spear Garrison Fencing – Residential Series (Table 1)

Suitable for residential and light commercial boundaries where a clean look and basic security are required.

POLYMETAL Crimped Spear Garrison Fencing – Standard Security Series (Table 2)

Designed for commercial sites, schools and medium-risk industrial boundaries.

POLYMETAL Crimped Spear Garrison Fencing – High Security Series (Table 3)

Optimised for 1800–2100 mm high security perimeters and sensitive sites.

POLYMETAL Crimped Spear Garrison Fencing – Heavy Post & Gate Line Series (Table 4)

For gate posts, corners and high-load sections where post strength is critical.

By working from these POLYMETAL Crimped Spear Garrison Fencing tables instead of vague “standard panels”, you lock in the fence height, width, rail frame, upright size, spacing, garrison fence post per meter layout and post dimensions your site actually needs. Combined with universal security brackets, steel caps, quality screws and protective packaging, you get a black 2100 mm high security fence system that is built to stay straight, sharp and strong for years – not just until the first serious test.