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834 North Lake Rd, Jandakot
Lot 455 St Albans Rd, Baldivis
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     Retaining Install Instructions
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Retaining Install Instructions Home : Retaining Panels : Retaining Install Instructions :

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A BRIEF DESCRIPTION AND INSTALLATION INSTRUCTIONS

The Twinside Retaining System is a cantilever retaining wall. Fundamental to the system is the principle that the posts MUST BE CEMENTED into the ground the same distance as they protrude above the ground.

The Twinside Product: Twinside retaining panels are reinforced, measuring 1430mm long x 300mm high and 60 mm thick. Each panel weighs approximately 50kg and reinforced posts weigh approximately 10kg per 300mm.

Installing a Twinside Retaining Wall.

Dig a hole at one end of the wall with the dimensions of 300mm x 300mm x the height of the wall. To ensure the hole is the correct depth, set the post down and measure the amount protruding above the ground. The posts should lean 2º into the load, i.e. towards the high side, the ground that is to be retained. Concrete the first post in using a ratio of 4 sand, 2 stone and 1 cement, or use the sand removed at a ratio of 8 to 1 cement by volume. Fill the hold around the post to ground level.

Use a string line to mark off every 1500mm centres. When digging the holes use a rod the same length as your posts to ascertain the correct depth of the holes. Raise the string line to the height of the wall to ensure that the posts are of the right height.

To make sure the distances between the posts are correct before cementing in further posts or putting a panel in, it is recommended that a piece of wood or a rod be cut to the same length as the panel plus 10mm, i.e. 1440mm. You can then test to see that the panels will raise and lower in the grooves with no problems.

It is also recommended that you place one panel in at a time. This gives the concrete some time to cure and also holds the posts steady whilst you dig more holes.

When carrying a panel, please remember to hold it vertically as it places less strain on the centre of the panel.

Place the panel in with an offsider and ensure that it remains horizontal in the groves and does not jam. It is also important that the panel is the right way up, that being with the narrower edge on top.

Push the panel to the front of the groove, and insert small stones at the rear of the groove, then grout between the panel and the post with a mix of 3 sand, 1 lime, 1 cement.

IMPORTANT

Do NOT backfill straight away. Leave for a few days so that the cement footings can cure.

If compaction is required, do not use machinery to compact. Spraying water from a garden hose is sufficient for compaction.

Product Specifications Twinside Retaining Walls

Product engineered to Australian standards, Twinside retaining wall panels are 60mm thick and contain steel reinforcing in accordance with AS 4671. The posts are also reinforced with steel, also in accordance with this standard. Twinside retaining walls up to 1500mm high are standard with concrete posts whilst those above this height require galvanised steel posts.

Twinside retaining walls can be designed and engineered for high-load applications such as immediately adjacent to and under roads and buildings. The wall system is also available and fully certified for wind areas such as Region D cyclone zones, with increased loading from colourbond fencing immediately above the wall. The latter system includes the use of galvanised steel posts for all retaining wall heights.

All concrete exceeds 40mpa and quality control checks are regularly carried out to ensure our exacting standards are met. Evidence of this can be provided upon request if required.

All steel reinforcing is hot dip galvanised when installation is within 5 kilometres of the coast, once again in accordance with Australian standards.

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Our Locations

Lot 455 St Albans Rd
Baldivis WA 6171, Australia
(08) 9524 1909

834 North Lake Road
Jandakot WA 6164, Australia
(08) 9417 5300

About us

Earth and Stone Outdoor Centres is a family owned and run business which was established in 2007.

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