H4 Treated Pine Sleeper 200×75
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H4 Treated Pine Sleeper 200×75

Price range: $ 28.30 through $ 35.40
H4 Treated Pine Sleeper 200×75. Available in 2.4m and 3m lengths.
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PRODUCT DESCRIPTION

The H4 Treated Pine Sleeper 200x75mm is the go-to choice where greater mass and structural depth are required. Pressure-treated to Hazard Class H4 under Australian Standards, it is fully rated for in-ground and soil-contact use — standing up to termites, fungal decay, and the demanding Australian climate across a wide range of landscaping and construction applications.

The extra 25mm of depth over the 200×50 profile delivers noticeably greater rigidity and load resistance, making the 200×75 the standard specification for retaining walls over 300mm in height, heavy-duty garden terracing, and anywhere you need the confidence of a more substantial sleeper. It’s a firm favourite with both professional landscapers and experienced DIYers across Australia.

Sourced from plantation-grown Radiata Pine, the sleeper’s rough-sawn face brings a warm, natural character to any outdoor setting. It can be finished with a quality timber oil, stain, or paint to complement your landscape design.

Available in:

  • 2.4m length
  • 3m length

Key Features:

  • H4 Hazard Class — certified for in-ground contact
  • CCA pressure-treated from plantation Radiata Pine for long-term durability
  • Thicker 75mm profile — ideal for taller retaining walls and heavy-duty applications
  • Rough-sawn finish suits a variety of landscaping styles
  • Suitable for retaining walls, garden steps, terracing, and structural ground-level use
  • Easy to work with on-site — can be cut, drilled, and shaped as required
Q1. What is the difference between the 200×50 and 200×75 H4 sleeper?
The key difference is the thickness — 50mm versus 75mm. Both share the same 200mm width and H4 treatment rating, but the 200×75 has a deeper profile that gives it greater structural mass and rigidity. This makes it the preferred choice for taller retaining walls (over 300mm), areas with higher soil pressure, and projects where durability under load is a priority. The 200×50 is lighter and easier to handle, making it popular for low walls, garden edging, and DIY use.
Q2. How high can I build a retaining wall with 200×75 sleepers?
H4 treated pine sleepers in the 200x75mm profile are commonly used for retaining walls up to 600mm in height. For walls exceeding 600mm, or where the site involves unstable soil, steep gradients, or a surcharge load (such as a vehicle path above the wall), Australian building regulations generally require an engineer's assessment and council approval. Always check your local council requirements before commencing construction.
Q3. Do I need to treat the cut ends of the sleepers?
Yes. Whenever you cut a treated pine sleeper, the freshly exposed end is no longer protected by the preservative treatment. It is important to apply a quality end-grain timber preservative or sealant to any cut surfaces before installation. This is a simple step that helps maintain the integrity of the H4 protection at the point of greatest moisture and soil exposure.

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Price range: $ 28.30 through $ 35.40
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