Marker blocks
Precast concrete marker blocks play an important role in aiding the location and identification of buried utility services and underground infrastructure, including electric cables, gas pipes, and water lines.
Available in a range of standard sizes with various lengths, where applicable blocks have a recess on the underside to house a 6mm galvanised bar to enable cable draw ropes, etc to be attached.
Marker Blocks are manufactured in accordance with BS 1881 and standard blocks are listed in the table below.
The standard recess size for identification plates is 100mm x 75mm – other requirements can be made to order.




Our precast concrete marker blocks offer several advantages, particularly for utility management and infrastructure such as:
Identification and Safety
Utility Location
Concrete marker blocks are used to identify buried electric cables and other utility services. This is crucial for preventing accidental damage during excavation or construction activities, which can pose safety hazards and lead to service disruptions.
Boundary Marking
They can also mark boundaries and reference points, helping to define property lines or specific areas of interest.
Durability and Longevity
Weather Resistance
Made from precast concrete, our marker blocks are resistant to weathering and environmental damage. They do not rot, warp or decay, ensuring a long service life, even under harsh weather conditions.
Low Maintenance
Once installed, our concrete marker block require minimal maintenance. Their robust construction means they can withstand exposure to various elements without compromising their structural integrity.
Versatility
Multiple Applications
Beyond marking utilities, concrete marker blocks can be used in various applications, their adaptability makes them suitable for both commercial and agricultural uses.
Cost-Effectiveness
Long-Term Investment
Due to their durability and low maintenance needs, concrete marker blocks offer a cost-effective solution. They often last for decades without needing replacement, reducing overall lifecycle costs and offer sustainable procurement.
Concrete marker blocks are essential for ensuring the safety of utility management, while also providing a durable, versatile and cost-effective solution.
Code | Height | Width | Depth | Weight | Other Refs |
Narrative |
CG2 | 300mm | 300mm | 150mm | 32kg | BCB 300 | Electric Cables |
CG2B | 300mm | 300mm | 150mm | 32kg | High Voltage Cables | |
CG2C | 300mm | 300mm | 150mm | 32kg | Fibre Optic Cables | |
CG2D | 300mm | 300mm | 150mm | 32kg | Gas | |
CG2E | 300mm | 300mm | 150mm | 32kg | Water | |
CG2F | 300mm | 300mm | 150mm | 32kg | DHM![]() |
|
CG2G | 300mm | 300mm | 150mm | 32kg | Boundary | |
CG2H | 300mm | 300mm | 150mm | 32kg | BT | |
CG2J | 300mm | 300mm | 150mm | 32kg | SP | |
CG2A1 | 300mm | 300mm | 225mm | 48kg | D | |
CG2A2 | 300mm | 300mm | 225mm | 48kg | DD | |
CG2A3 | 300mm | 300mm | 225mm | 48kg | J | |
CG3 | 600mm | 600mm | 100mm | 89kg | Electric Cables | |
CG4 | 300mm | 300mm | 75mm | 16kg | Fire Mains | |
CG5 | 150mm | 300mm | 150mm | 15kg | Highway Boundary | |
CG5A | 100mm | 100mm | 500mm | 12kg | HB | |
CG5B | 150mm | 300mm | 105mm | 11kg | Highway Boundary | |
CG6 | 250mm | 450mm | 105mm | 26kg | Filter Drain Below | |
CG8 | 150mm | 900mm | 60mm | 18kg | Flood Protection Do not remove |