Quad Cube

Quad Cubes
Bigger Coverage - Better Value
 
Quad Cubes (same as 4 x single cubes) are a smart, cost-effective option for building large-scale floating docks, walkways, or event stages on water. They deliver solid performance and reliability without blowing the budget – all while keeping the same stability you'd expect from individual cubes.
 
Made using eco-conscious HMWHDPE through extrusion moulding, these cubes are tough, long-lasting, and fully recyclable – perfect for long-term marine use without harming the environment.
 
Each square metre of platform is formed by four standard-sized cubes, providing a solid top load capacity of up to 330kg per m². A built-in anti-slip surface keeps things safe underfoot, while the rounded corners reduce risks often associated with traditional docks – no splinters, sharp edges, or rusty metal hazards.
 
Float height (unloaded): 2.5–3cm
Float with 150kg load: 15–20cm draft (safe range)
Float with 300kg load: 35–40cm draft (max capacity)
 
Engineered to handle Aussie conditions, the anti-wind and wave design adds serious stability in varying water states – great for lakes, marinas, and calm coastal areas.
 
Wave Suitability:
Class 2–3 waves: Fully safe
Class 3–6 waves: Use with reinforced safety measures
Class 6–9 waves: Not recommended – avoid mooring or foot traffic 
 
Backed by a 3-year warranty, these durable HDPE cubes are a practical solution for anyone needing reliable, adaptable, and safe floating structures.
 
Quad Cube Specs
Size: 200 x 50 x 40 cm
Weight: 12kgs
Colour: Blue, Grey
Custom Colour: MOQ 100m2 (100pce)
Durability: Resistant to UV, frost, seawater, corrosion, and heavy impact
Safety: Anti-slip surface with rounded edges for safe, stable walkways
Flexibility: Modular design allows quick installation and easy reconfiguration
Longevity: Designed for 10–15 years of dependable use with minimal maintenance
Material: 100% high molecular weight & high-density HDPE
Pontoon buoyancy: > 330 kg/m2 - Detection method: QB 1557-1992
Diagonal tensile strength: > 27 kN - Detection method: GB/T 1040.1-2006
Compressive strength: > 40 Kn - Detection method: GB/T 8813-2008
Tensile strength: > 30 Mpa - Detection method: ASTM D638-2014
Impact strength: > 65kJ/m2 - Detection method: ASTM D256-2010
 
ROHS tests
The raw materials do not contain six chemicals including lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyl and polybrominated diphenyl ether, making it more conducive to human health and environmental protection.
 
Pricing ex Depots (Cubes Only)
Quad Cubes included with purchases of dock systems sold per m2
To Purchase separately: $450ea (includes shipping)
OTTOP depots in Brisbane, Melbourne, Perth, and Sydney
To Door Delivery and Other Destinations available on request
 
Delivery Time
Approximate lead time is 6–8 weeks
 
Dock Accessories
OTTOP carries the largest range of modular dock accessories in Australia
Discounts available when purchased with a dock system
Accessories also sold separately (shipping applies)
 
Dock Installation
DIY ready with straightforward setup
Two people can install around 50 cubes per hour
Comes with clear, step-by-step instructions
Installation available on request (service fee applies)