Heavy-Duty Pavers
At Unilock, we’re introducing a new way to explore our pavers and slabs — one that starts with product finish. Our surfaces now take center stage. If you can’t find a product you’re familiar with, don’t worry, it’s still available.
Explore products below to see the available shape and color options.
Load Lock™ – 12 x 24″
(300 x 600mm)
H: 3 ⅞”
(100mm)
12 x 12″
(300 x 300mm)
H: 3 ⅞”
(100mm)
Load Lock™ – 12 x 12″
(300 x 300mm)
H: 3 ⅞”
(100mm)
Permeable – 12 x 12″
(300 x 300mm)
H: 3 ⅞”
(100mm)
Joint Space: 7mm
Void %: 4.84%
6 x 12″
(150 x 300mm)
H: 3 ⅞”
(100mm)
Load Lock™ – 6 x 12″
(150 x 300mm)
H: 3 ⅞ or 6″
(100 or 150mm)
4 x 12″
(100 x 300mm)
H: 3 ⅞”
(100mm)
Load Lock™ – 4 x 12″
(100 x 300mm)
H: 3 ⅞”
(100mm)
3 x 12″
(75 x 300mm)
H: 3 ⅞”
(100mm)
Permeable – 3 x 12″
(75 x 300mm)
H: 3 ⅞”
(100mm)
Joint Space: 7mm
Void %: 10.12%
Eco-Priora™ – 10 x 10″
(240 x 240mm)
H: 3 ⅛”
(80mm)
Joint Space: 7mm
Void %: 4.6%
Eco-Priora™ – 5 x 10″
(120 x 240mm)
H: 3 ⅛”
(80mm)
Joint Space: 7mm
Void %: 6.8%
8 x 8″
(200 x 200mm)
H: 2 ¾”
(70mm)
4 x 8″
(100 x 200mm)
H: 2 ¾ or 3 ⅛”
(70 or 80mm)
6 x 6″
(150 x 150mm)
H: 2 ¾”
(70mm)
Eco-Priora™ – 5 x 5″
(120 x 120mm)
H: 3 ⅛”
(80mm)
Joint Space: 6mm
Void %: 12.8%
Optiloc™
(260 x 260mm)
H: 3 ⅛”
(80mm)
Eco-Optiloc™
(250 x 250mm)
H: 3 ⅛”
(80mm)
Joint Space: 12mm
Void %: 7.3%
Hex – 8″
(200 x 200mm)
H: 2 ¾”
(70mm)
Permeable Hex – 8″
(205 x 205mm)
H: 3 ⅛”
(80mm)
Joint Space: 10mm
Void %: 4.2%
Grenada White
SRI 45 | SR 0.52
Polar Sky
Polar Storm
Arctic Tundra
Arctic Dune
Winter Marvel
SRI 35 | SR 0.38
Summer Wheat
SRI 48 | SR 0.42
Coastal Shore
Emerald Beach
Sandy Sea Glass
Harvest Brown
Autumn Sunset
SRI 32 | SR 0.30
Summer Rose
SRI 28 | SR 0.27
French Grey
SRI 17 | SR 0.18
Starry Night
Urban Nightfall
Midnight Sky
SRI 15 | SR 0.17
Load Lock™ – 12 x 24″
(300 x 600mm)
H: 3 ⅞”
(100mm)
12 x 12″
(300 x 300mm)
H: 3 ⅞”
(100mm)
Load Lock™ – 12 x 12″
(300 x 300mm)
H: 3 ⅞”
(100mm)
Permeable – 12 x 12″
(300 x 300mm)
H: 3 ⅞”
(100mm)
Joint Space: 7mm
Void %: 4.84%
6 x 12″
(150 x 300mm)
H: 3 ⅞”
(100mm)
Load Lock™ – 6 x 12″
(150 x 300mm)
H: 3 ⅞ or 6″
(100 or 150mm)
4 x 12″
(100 x 300mm)
H: 3 ⅞”
(100mm)
Load Lock™ – 4 x 12″
(100 x 300mm)
H: 3 ⅞”
(100mm)
3 x 12″
(75 x 300mm)
H: 3 ⅞”
(100mm)
Permeable – 3 x 12″
(75 x 300mm)
H: 3 ⅞”
(100mm)
Joint Space: 7mm
Void %: 10.12%
Eco-Priora™ – 10 x 10″
(240 x 240mm)
H: 3 ⅛”
(80mm)
Joint Space: 7mm
Void %: 4.6%
Eco-Priora™ – 5 x 10″
(120 x 240mm)
H: 3 ⅛”
(80mm)
Joint Space: 7mm
Void %: 6.8%
8 x 8″
(200 x 200mm)
H: 2 ¾”
(70mm)
4 x 8″
(100 x 200mm)
H: 2 ¾ or 3 ⅛”
(70 or 80mm)
6 x 6″
(150 x 150mm)
H: 2 ¾”
(70mm)
Eco-Priora™ – 5 x 5″
(120 x 120mm)
H: 3 ⅛”
(80mm)
Joint Space: 6mm
Void %: 12.8%
Optiloc™
(260 x 260mm)
H: 3 ⅛”
(80mm)
Eco-Optiloc™
(250 x 250mm)
H: 3 ⅛”
(80mm)
Joint Space: 12mm
Void %: 7.3%
Hex – 8″
(200 x 200mm)
H: 2 ¾”
(70mm)
Permeable Hex – 8″
(205 x 205mm)
H: 3 ⅛”
(80mm)
Joint Space: 10mm
Void %: 4.2%
Golden Tan
SRI 45 | SR 0.40
SS0121
SS0020
Mocha Brown
SS0341
Glacier
Peppered Granite
SRI 42 | SR 0.38
SS0454
SS0412
SRI 64 | SR 0.56
Arctic Grey
SRI 27| SR 0.26
SS0032 W2
SRI 29 | SR 0.28
Mountain Mist
SRI 29 | SR 0.28
Mineral Ice Grey
SS0447
Ice Grey
SRI 38 | SR 0.35
SS0451
Nordic Star
SRI 10 | SR 0.14
Crystalline Basalt
Platinum Grey
SRI 29 | SR 0.28
Cobalt Grey
Black Granite
Load Lock™ – 12 x 24″
(300 x 600mm)
H: 3 ⅞”
(100mm)
12 x 12″
(300 x 300mm)
H: 3 ⅞”
(100mm)
Load Lock™ – 12 x 12″
(300 x 300mm)
H: 3 ⅞”
(100mm)
Permeable – 12 x 12″
(300 x 300mm)
H: 3 ⅞”
(100mm)
Joint Space: 7mm
Void %: 4.84%
6 x 12″
(150 x 300mm)
H: 3 ⅞”
(100mm)
Load Lock™ – 6 x 12″
(150 x 300mm)
H: 3 ⅞ or 6″
(100 or 150mm)
4 x 12″
(100 x 300mm)
H: 3 ⅞”
(100mm)
Load Lock™ – 4 x 12″
(100 x 300mm)
H: 3 ⅞”
(100mm)
3 x 12″
(75 x 300mm)
H: 3 ⅞”
(100mm)
Permeable – 3 x 12″
(75 x 300mm)
H: 3 ⅞”
(100mm)
Joint Space: 7mm
Void %: 10.12%
Eco-Priora™ – 10 x 10″
(240 x 240mm)
H: 3 ⅛”
(80mm)
Joint Space: 7mm
Void %: 4.6%
Eco-Priora™ – 5 x 10″
(120 x 240mm)
H: 3 ⅛”
(80mm)
Joint Space: 7mm
Void %: 6.8%
8 x 8″
(200 x 200mm)
H: 2 ¾”
(70mm)
4 x 8″
(100 x 200mm)
H: 2 ¾ or 3 ⅛”
(70 or 80mm)
6 x 6″
(150 x 150mm)
H: 2 ¾”
(70mm)
Eco-Priora™ – 5 x 5″
(120 x 120mm)
H: 3 ⅛”
(80mm)
Joint Space: 6mm
Void %: 12.8%
Optiloc™
(260 x 260mm)
H: 3 ⅛”
(80mm)
Eco-Optiloc™
(250 x 250mm)
H: 3 ⅛”
(80mm)
Joint Space: 12mm
Void %: 7.3%
AnchorLock™
(225 x 225mm)
H: 3 ⅛”
(80mm)
DuraFlow™
(250 x 250mm)
H: 3 ⅛”
(80mm)
Joint Space: 12mm
Void %: 8%
Hex – 8″
(200 x 200mm)
H: 2 ¾”
(70mm)
Permeable Hex – 8″
(205 x 205mm)
H: 3 ⅛”
(80mm)
Joint Space: 10mm
Void %: 4.2%
Ivory
Indiana Buff
SRI 61| SR 0.52
SS0260
Sterling
SRI 46 | SR 0.41
Light Grey 0.75%
Almond Grove
SRI 25 | SR 0.25
Fossil
SRI 21 | SR 0.22
Bavarian
SRI 47 | SR 0.42
Sierra
River
SRI 40 | SR 0.36
Beechwood
Mocha
Sandy Beige
SRI 42 | SR 0.38
Chamois
SRI 46 | SR 0.41
SS0068
Tuscany
SRI 32 | SR 0.3
SS0334
Heritage Brown
Charleston
Autumn Red
Rustic Red
Natural
SRI 31 | SR 0.29
New York Blend
SS0286
SS0287
Granite Fusion
SRI 29 | SR 0.28
Opal
SRI 24 | SR 0.24
Silver Grey
SRI 37 | SR 0.34
Granite
Medium Grey 2%
SS0381
Steel Grey
SRI 5 | SR 0.09
Dark Charcoal
Black 8%
Load Lock™ – 12 x 24″
(300 x 600mm)
H: 3 ⅞”
(100mm)
12 x 12″
(300 x 300mm)
H: 3 ⅞”
(100mm)
Load Lock™ – 12 x 12″
(300 x 300mm)
H: 3 ⅞”
(100mm)
Permeable – 12 x 12″
(300 x 300mm)
H: 3 ⅞”
(100mm)
Joint Space: 7mm
Void %: 4.84%
6 x 12″
(150 x 300mm)
H: 3 ⅞”
(100mm)
Load Lock™ – 6 x 12″
(150 x 300mm)
H: 3 ⅞ or 6″
(100 or 150mm)
4 x 12″
(100 x 300mm)
H: 3 ⅞”
(100mm)
Load Lock™ – 4 x 12″
(100 x 300mm)
H: 3 ⅞”
(100mm)
3 x 12″
(75 x 300mm)
H: 3 ⅞”
(100mm)
Permeable – 3 x 12″
(75 x 300mm)
H: 3 ⅞”
(100mm)
Joint Space: 7mm
Void %: 10.12%
Eco-Priora™ – 10 x 10″
(240 x 240mm)
H: 3 ⅛”
(80mm)
Joint Space: 7mm
Void %: 4.6%
Eco-Priora™ – 5 x 10″
(120 x 240mm)
H: 3 ⅛”
(80mm)
Joint Space: 7mm
Void %: 6.8%
8 x 8″
(200 x 200mm)
H: 2 ¾”
(70mm)
4 x 8″
(100 x 200mm)
H: 2 ¾ or 3 ⅛”
(70 or 80mm)
6 x 6″
(150 x 150mm)
H: 2 ¾”
(70mm)
Eco-Priora™ – 5 x 5″
(120 x 120mm)
H: 3 ⅛”
(80mm)
Joint Space: 6mm
Void %: 12.8%
Optiloc™
(260 x 260mm)
H: 3 ⅛”
(80mm)
Eco-Optiloc™
(250 x 250mm)
H: 3 ⅛”
(80mm)
Joint Space: 12mm
Void %: 7.3%
Hex – 8″
(200 x 200mm)
H: 2 ¾”
(70mm)
Permeable Hex – 8″
(205 x 205mm)
H: 3 ⅛”
(80mm)
Joint Space: 10mm
Void %: 4.2%
Frost
SRI 68 | SR 0.57
Sterling
Savannah
Sandy Beige
Chamois
Metallic Grey
SRI 18 | SR 0.19
Silver Grey
Charcoal
Load Lock™ – 12 x 24″
(300 x 600mm)
H: 3 ⅞”
(100mm)
12 x 12″
(300 x 300mm)
H: 3 ⅞”
(100mm)
Load Lock™ – 12 x 12″
(300 x 300mm)
H: 3 ⅞”
(100mm)
Permeable – 12 x 12″
(300 x 300mm)
H: 3 ⅞”
(100mm)
Joint Space: 7mm
Void %: 4.84%
6 x 12″
(150 x 300mm)
H: 3 ⅞”
(100mm)
Load Lock™ – 6 x 12″
(150 x 300mm)
H: 3 ⅞ or 6″
(100 or 150mm)
4 x 12″
(100 x 300mm)
H: 3 ⅞”
(100mm)
Load Lock™ – 4 x 12″
(100 x 300mm)
H: 3 ⅞”
(100mm)
3 x 12″
(75 x 300mm)
H: 3 ⅞”
(100mm)
Permeable – 3 x 12″
(75 x 300mm)
H: 3 ⅞”
(100mm)
Joint Space: 7mm
Void %: 10.12%
Eco-Priora™ – 10 x 10″
(240 x 240mm)
H: 3 ⅛”
(80mm)
Joint Space: 7mm
Void %: 4.6%
Eco-Priora™ – 5 x 10″
(120 x 240mm)
H: 3 ⅛”
(80mm)
Joint Space: 7mm
Void %: 6.8%
8 x 8″
(200 x 200mm)
H: 2 ¾”
(70mm)
4 x 8″
(100 x 200mm)
H: 2 ¾ or 3 ⅛”
(70 or 80mm)
6 x 6″
(150 x 150mm)
H: 2 ¾”
(70mm)
Eco-Priora™ – 5 x 5″
(120 x 120mm)
H: 3 ⅛”
(80mm)
Joint Space: 6mm
Void %: 12.8%
Hex – 8″
(200 x 200mm)
H: 2 ¾”
(70mm)
Permeable Hex – 8″
(205 x 205mm)
H: 3 ⅛”
(80mm)
Joint Space: 10mm
Void %: 4.2%
Heritage Brown
Sandy Beige
SRI 19 | SR 0.2
Light Grey
SRI 22 | SR 0.22
Granite
SS0381
Dark Charcoal
SS0287
SS0286
Load Lock™ – 12 x 24″
(300 x 600mm)
H: 3 ⅞”
(100mm)
Load Lock™ – 12 x 12″
(300 x 300mm)
H: 3 ⅞”
(100mm)
Load Lock™ – 6 x 12″
(150 x 300mm)
H: 3 ⅞ or 6″
(100 or 150mm)
Load Lock™ – 4 x 12″
(100 x 300mm)
H: 3 ⅞”
(100mm)
Eco-Priora™ – 10 x 10″
(240 x 240mm)
H: 3 ⅛”
(80mm)
Joint Space: 7mm
Void %: 4.6%
Eco-Priora™ – 5 x 10″
(120 x 240mm)
H: 3 ⅛”
(80mm)
Joint Space: 7mm
Void %: 6.8%
8 x 8″
(200 x 200mm)
H: 2 ¾”
(70mm)
4 x 8″
(100 x 200mm)
H: 2 ¾ or 3 ⅛”
(70 or 80mm)
Eco-Priora™ – 5 x 5″
(120 x 120mm)
H: 3 ⅛”
(80mm)
Joint Space: 6mm
Void %: 12.8%
Optiloc™
(260 x 260mm)
H: 3 ⅛”
(80mm)
AnchorLock™
(225 x 225mm)
H: 3 ⅛”
(80mm)
Eco-Optiloc™
(250 x 250mm)
H: 3 ⅛”
(80mm)
Joint Space: 12mm
Void %: 7.3%
DuraFlow™
(250 x 250mm)
H: 3 ⅛”
(80mm)
Joint Space: 12mm
Void %: 8%
Dura-Mat™
(500 x 500mm)
H: 3 ⅞”
(100mm)
Turfstone™
(400 x 600mm)
H: 3 ⅛”
(80mm)
Joint Space: 2mm
Void %: 40%
Sterling
Beechwood
Sandy Beige
Chamois
River
SRI 34 | SR 0.32
Sierra
Autumn Red
Rustic Red
Terra Cotta
Granite
Natural
SRI 32 | 0.3
Silver Grey
Charcoal
SRI 9 | SR 0.012
Unilock meets and exceeds ASTM C936 – Standard Specifications for Solid Concrete Interlocking Paving Units using test methods conforming to:
- ASTM C1645 for Freeze Thaw Durability <225g/m2
- C140 for Compressive Strength >8000 psi and Absorption <5%
- C418 for Abrasion Resistance
Unilock products can help contribute to earning points toward LEED certification for your projects. See LEED v5 for more specific project site details when calculating credits.
LEED BD+C: New Construction – LEED v5
Materials and Resources
- Quantify and Assess Embodied Carbon
- Reduce Embodied Carbon – Option 2. Environmental Product Declaration (EPD) Analysis
Sustainable Sites
- Accessible Outdoor Space
- Enhanced Resilient Site Design
- Heat Island Reduction: Option 1. Nonroof and Roof
- Rainwater Management – Option 1: Percentile of Rainfall Events
LEED O+M: Existing Buildings
Sustainable Sites
- Heat Island Reduction: Option 1. Nonroof and Roof
Heavy-duty pavers are specialized interlocking concrete paving units engineered to perform in the most demanding environments. There are two key features that distinguish these units from standard, or “light duty”, paving units:
- Increased Thickness: These pavers are thicker, typically 70 mm (2 ¾”) or more, to effectively manage and distribute concentrated loads. This increased mass is crucial to prevent pavement failure.
- Low Aspect Ratio: Aspect ratio (the ratio of paver length to thickness) is typically 3:1 or less. This low ratio is fundamental to stability, preventing individual units from rocking, tilting, or fracturing under extreme vertical and horizontal forces, such as heavy vehicle braking and turning.
Heavy-duty pavers are specifically designed to withstand extreme loads and continuous use, making them the superior choice for surfaces that will experience vehicular traffic beyond typical residential or light commercial use.
Heavy-duty pavers are typically recommended whenever the paved area is expected to handle the weight of semi-trucks (including standard H-20 loading requirements), heavy equipment, emergency vehicles or constant and cyclical car traffic. This includes applications like parking lots, streetscapes, shipping yards, heavy equipment storage areas, bus terminals, and service vehicle access routes. When properly installed using the appropriate construction methods, our heavy-duty pavers effectively resist forces, preventing rutting, shifting, and surface deformation even under demanding conditions.
Benefits of Heavy-Duty Pavers over Asphalt or Poured Concrete
Segmental Flexibility: Unlike poured concrete, the segmental nature of pavers allows the pavement to flex and move slightly with freeze-thaw cycles. This virtually eliminates the cracking commonly found with rigid surfaces.
Non-Destructive Utility Access: Segmental paver units can be easily lifted for access to underground utilities (e.g., water lines, sewer pipes) and then relayed. This results in significantly lower repair costs, less site disruption, and reduced environmental impact compared to having to saw-cut, dispose of and repour asphalt or concrete.
Immediate Traffic Use: Upon completion of the installation, the pavement is immediately accessible to traffic, eliminating the costly curing time required for poured concrete or setting time for asphalt.
Aesthetic Versatility: Unlike asphalt or poured concrete, our heavy-duty pavers are available in multiple shapes, sizes, colors and textures to create designs that offer superior aesthetics while not compromising performance.
Selecting the right heavy-duty paver is just the first step. For maximum performance and longevity, the overall design of the system and installation methods are equally crucial.
- Laying Pattern: The laying pattern used can add a significant amount of strength to the design. A herringbone pattern provides the best ‘lock-up’ for rectangular shaped pavers, adding strength against rotational forces such as tires at a roadway intersection. This pattern delivers performance, similar to how an ‘L’-shaped paver resists twisting and tipping.
- Sustainability: For projects with stormwater management requirements, permeable heavy-duty pavers are available. These pavers work as part of a system that efficiently manages surface water, reducing runoff, naturally filtering pollutants, and recharging groundwater.
- Mechanical Installation: For large-scale, heavy-duty projects such as streetscapes and big parking lots, installation efficiency is crucial. To address this, we have a variety of heavy-duty pavers that are designed for mechanical installation, which delivers faster results and lowers labor costs.
