The Optimum Onyx Block Concrete Sleeper combines a bold rock face texture with a sleek sealed onyx finish for retaining walls and garden features that make a statement.

The natural block pattern and dark onyx colour bring a contemporary edge to any outdoor space, pairing perfectly with dark steel posts, stone finishes and modern minimalist plantings. Two embedded N12 steel bars and high strength concrete rated at 55 to 60 MPa deliver the structural performance to back up the looks.

Available in 1.6m, 2.0m and 2.4m lengths, stack between galvanised steel posts for retaining walls, raised garden beds, terraced slopes or feature edging around patios and pathways.

Features

• Rock face block pattern with sealed onyx finish and subtle shine
• 2 bar N12 steel reinforcement for walls up to 2.4m high
• High strength concrete rated at 55 to 60 MPa
• 60 year design life resistant to termites, weathering and the elements
• Available in 1.6m, 2.0m and 2.4m lengths

Best For Contemporary retaining walls, raised garden beds, terraced gardens and feature edging around patios and pathways in modern outdoor settings.

Exact Measurements When setting your posts, use the exact installed lengths below as your guide. Sleepers are manufactured slightly shorter to fit neatly into post channels.

• 1.6m Sleeper = 1591mm length
• 2.0m Sleeper = 1991mm length
• 2.4m Sleeper = 2391mm length

Select your preferred length above.

Sleeper Weight

• 1.6m Sleeper = 60kg
• 2.0m Sleeper = 70kg
• 2.4m Sleeper = 80kg

What is a 2 Bar or 3 Bar Concrete Sleeper? This simply refers to how many bars of reinforcing steel are inside each sleeper. 2 bar holds two bars of reo and 3 bar holds three. Unless you are building an engineer certified wall above 1.1m you will not need 3 bar. We generally only supply 2 bar for domestic jobs. If you are building a tall retaining wall please seek advice from an engineer.

Ordering & Delivery Please make your selection and order online. You will be able to choose to pick up in store free of charge or have the product delivered directly to you.

For orders of 10 or more sleepers we always recommend having the product delivered direct from the supplier by crane truck, placed directly at your site in a convenient location. The cost for direct delivery around the Brisbane area will depend on your exact location, quantity and total weight, ranging from roughly $190 to $399.

To arrange delivery simply place your order online, choose delivery and add your address. You will be charged at our standard delivery rate. Once we receive your order we will negotiate the best supplier freight price and contact you via email or phone on the same day, or next business day if your order is placed after hours, to advise your freight quote. You can then pay the difference and we will get your order out on your required timeframe.

If you are not happy with the freight quote we will offer a full refund, or you can arrange your own freight from our yard and we will refund the delivery charge. We always do our best to make this process as easy and cost effective as possible.

Exact sleeper lengths are 10mm shorter than nominal size, so set your posts at exactly 1.6m, 2.0m or 2.4m.