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What is Permacrib? |
| A |
Permacrib is a timber retaining wall solution which uses treated timber to form a crib structure to encapsulate stone, providing a cost effective simple “gravity wall”. |
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What is a gravity wall? |
| A |
A gravity wall is a retaining wall that relies largely on its mass to resist unwanted earth movements. |
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What is Permacrib manufactured from? |
| A |
Radiata pine, soft wood, plantation grown from a renewable forest |
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What is the design life? |
| A |
In excess of 60 years. All components are treated with High Concentration Copper Azole preservative solution. |
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| Q |
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What can it be filled with? |
| A |
Stone, crushed concrete, recycled bricks. |
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| Q |
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Why is it built leaning? |
| A |
This helps to prevent overturning, and less soil wedge behind the wall produces less pressure. |
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Can it be built vertically? |
| A |
No. |
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| Q |
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Does it need a foundation? |
| A |
Yes (see cross sections). The trench is built and filled with stiff mix concrete. An angle of 1:4 is on the top to form batter or "lean back". |
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How are the headers connected to the foundation? |
| A |
They are tamped into concrete. |
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| Q |
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Can the wall be planted? |
| A |
Yes, grow bags can be inserted into the wall during the build process. |
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| Q |
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Can fencing be put on top of the wall? |
| A |
Yes, we have various standard details. |
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Can the colour of Permacrib be changed? |
| A |
Yes, components can be stained. |
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Will Phi Group design and build a Permacrib wall for me? |
| A |
Yes, please contact us for details. |
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| Q |
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Can Phi Group supply Permacrib for me to build myself? |
| A |
Yes, please contact us for details. |
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| Q |
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Does Permacrib allow drainage through the wall to relieve Hydrostatic Pressure Build Up? |
| A |
Yes, the infill and backfill stone are graded to allow good drainage. |
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| Q |
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Can Permacrib accommodate applied loads in the form of slope surcharges and, for example Car Park or Heavy Goods Vehicle loading? |
| A |
Yes, Permacrib can be designed (using standard components), to accommodate various loads. Please contact us for details. |
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| Q |
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Steps through the wall are important in my design, can Permacrib allow for this? |
| A |
Yes, Phi Group have developed a range of steps through walls and parallel to them. Please contact us for details. |