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Rocklok®

The Rocklok® segmental concrete block retaining wall system has been proudly developed in New Zealand in conjunction with engineers to meet the demands found in this highly active seismic region.

Rocklok provides superior strength and performance, with a stronger pin-block connection and trench system, allowing a positive connection between the geogrid and steel reinforcement. This system also allows near vertical walls to be constructed and for high load environments.

This fully engineered system is ideal for bridge abutments, wing walls and large retaining walls. The positive connection system provides extra performance and safety when critical loads are present while still providing an aesthetically attractive finish.

The Rocklok system is designed to work in conjunction with the StrataGrid® high performance PET geogrids. Together Rocklok and StrataGrid products provide a positive connection using the unique locking trench and bar system. The Rocklok is also designed in conjunction with Cirtex® steel ladder systems for applications where inextensible reinforcement is required such as bridge abutment applications and similar.

Important information

Please consult with your local council for site requirements and regulations before the construction of your wall.
For retaining walls exceeding 900mm, or supporting additional loads, slopes, etc., engineering advice should be sought. Contact us for advice.

Rocklok® is a Registered Trademark of Allan Block Corporation registered in the United States.

StrataGrid® is a Registered Trademark of Glen Raven, Inc. registered in the United States.


	Rocklok Flat Dimension: 450mm L x 300mm W x 200mm H Coverage: 11.12 blocks per m2 Pallet: 40 blocks per pallet Setback: 0.9 degrees from Vertical (near vertical) Weight: 39.5 Kg
	Rocklok Corner Dimension: 400mm L x 225mm W x 200mm H Coverage: 12.5 blocks per m2 Pallet: 54 blocks per pallet Setback: N/A Weight: 38 Kg
	Rocklok Cap Dimension: 450mm L x 300mm W x 100mm H Coverage: 2.23 blocks per linear metre Pallet: 63 blocks per pallet Setback: 0 degrees from Vertical Weight: 27.5 Kg
	Rocklok Fiberglass Pins* Dimension: 135mm L x 16mm diameter Box: 45 pins per box * Each Rocklok Flat block requires 2 Rocklok fiberglass pins

Benefits & Features

100% New Zealand designed and manufactured
Fully engineered & tested
Versatile, durable & flexible
Superior strength
Environmentally safe
Positive geogrid connection available

Rocklok is ideal for

Tall retaining walls
Terraced walls
High seismic areas
Steel ladder reinforced soil retaining structures
Bridge abutments
Wing walls
Water applications
Embankment stabilisation
Soil anchor and rock anchor walls

Specifications

Code	Product	Colour
13588	Rocklok Flat	Iron Sand
13592	Rocklok Corner	Iron Sand
13590	Rocklok Cap	Iron Sand
13594	Rocklok Fibreglass Pin	Yellow
13589	Rocklok Flat	Rock Salt
13593	Rocklok Corner	Rock Salt
13591	Rocklok Cap	Rock Salt
Made to order	Rocklok Ladder	Rock Salt/Iron Sand
Made to order	Rocklok Trench	Rock Salt/Iron Sand

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Frequently Asked Questions

The minimum embedment is 150mm. However, it is easier when constructing to use a minimum of 200mm, which is the height of the Rocklok units. This minimum embedment applies to retaining walls with a total wall height of 1.8m.

For retaining walls over 1.8m use the following formula:

Embedment (m) = Total wall height (m)/8

For example, the embedment depth of a 3m high retaining wall would be 3.0/8 = 0.375m.

Note: Unless specified by a chartered professional engineer, the embedment depth is to a maximum of 0.6m (three blocks). Poor soils, toe slopes, or seismically active areas may require extra embedment.

Non-cohesive clean gravels such as drainage metal 25/7, 20/6, or similar aggregates are the suggested materials to be placed inside the Rocklok open cavities, in the gaps between units, behind the units, and in the drainage column.

These coarse gravels will:

Provide extra draining capacity
Release hydrostatic pressure
Increase the weight of the Rocklok units
Provide direct interlocking between the Rocklok units and the reinforcement geogrid.

Some contractors might prefer to use scoria. Scoria is a suitable material that provides the drainage capacity. However, it is a very light aggregate, and it does not help to increase the structural stability of the Rocklok units by expanding the system weight as drainage metal does.

Note: It is recommended to avoid the use of rounded rocks like pebbles.

As a rule of thumb, for the gravity walls to act as independent structures the recommended distance (wall face to wall face) has to be at least a distance twice the height of the lower retaining wall.

Distance (D) >2×H (lower wall)

Note: This rule assumes the walls do not have back or toe slopes and that they are built in suitable ground as defined in NZS 3604:2011. Terraced walls closer than twice the height of the first wall should be evaluated by a chartered professional engineer.

100% NZ OWNED | 0800 247 839

Rocklok®

Benefits & Features

Rocklok is ideal for

Specifications

Featured Video

Downloads

Frequently Asked Questions

Related Products

Allan Block®

DuraForce® AS Series Geotextile

StrataGrid®

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