Quick Answer
Standard Australian fence post spacing is 2.4m (8 feet) for paling and Colorbond fences. For picket fences use 1.8-2.4m, ag fences 6-10m. Always include corner and end posts. Total posts = (fence length ÷ spacing) + 1.
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Australian Fence Post Spacing Standards
| Fence Type | Spacing | Post Size |
|---|---|---|
| Paling (1.8m hardwood) | 2.4m | 100×100mm H4 |
| Colorbond / steel | 2.45m (Colorbond standard) | 75×75 RHS or supplied steel |
| Picket (decorative) | 1.8-2.4m | 90×90mm treated pine |
| Pool fence (1.2m glass) | 1.0-1.2m | 25-50mm SS post |
| Ag/rural (4 strand wire) | 8-10m | 100×100mm H4 |
| Star picket (temporary) | 3-4m | 1.65m star picket |
Pool Fence Compliance (AS 1926.1)
Pool fences must comply with AS 1926.1: the gap between vertical members must not exceed 100mm, the fence height must be at least 1.2m, and there must be no climbable footholds in the lower 900mm. Pool fence post spacing is therefore tight (1.0-1.2m typical) regardless of post material.
FAQs
What is the standard fence post spacing in Australia?
2.4m (8 feet) for paling and Colorbond fences. This matches standard rail and panel sizes, minimising cuts.
How many fence posts do I need for 20 metres?
For a 20m straight fence at 2.4m spacing: 9 line posts + 2 end posts = 11 total. Add corner and gate posts as needed.
What size posts for a 1.8m paling fence?
100×100mm H4-treated hardwood posts, set in concrete piers 600-750mm deep depending on soil class.
Do I need bracing on a Colorbond fence?
End and corner posts need bracing or stronger footings. Long straight runs over 30m often benefit from intermediate brace posts.
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