10 batter as shown.
Retaining wall specifications qld.
Timber sleepers 1200mm higher if larger vertical posts used boulders 2500 to 3000mm.
A swimming pool or other retaining wall.
1 1 1 6min.
And the wall is no closer than 1 5m to a building structure e g.
Timber is a preferred material for landscaping purposes.
The general rule is that a retaining wall should be built entirely within the boundary of one of the properties and not on the common boundary like a fence.
Member sizes and post embedment depths shall be as outlined in tables 1 and 2 for preservative treated softwood and hardwood respectively.
Retaining walls up to 1 m high timber retaining walls up to one metre high can be constructed as shown in figure 1.
Retaining walls in particular contribute significantly to the surroundings when constructed in timber.
Retaining walls need building approval unless they meet all of the following criteria.
The batter allows for the wall to have some lateral.
Unless an exemption applies a qbcc contractor s licence is required to carry out or undertake to carry out the construction erection renovation alteration extension improvement or repair of a retaining wall if the value of the work exceeds 3 300 including the cost of materials.
This means that the maintenance and repair obligations generally rest with the person who owns the property the retaining wall is located on.
For hardwood posts which have a much smaller treatment zone backfill with no fines concrete.
The code also requires minimum clearances from roads and side and rear boundaries.
Retaining walls is a licence required.
There are also certain practical maximum height requirements depending on the type of material used to build the retaining wall.
The no fines concrete shall be 10 mm maximum aggregate size 450 kg cement m3and a water cement ratio of 0 55.
No approval is required under the building regulation 2006 for retaining walls if.
The queensland development code recommends you construct retaining walls up to one metre requiring fill or excavation in accordance with an accepted industry standard publication depending on the materials used to construct it e g.
There is no surcharge loading.
Less than one 1 metre high further than 1 5 metres to a building or another retaining wall only supports the soil behind the wall nothing above.
For treated softwood posts standard 15 mpa n15 concrete backfill is adequate.
Retaining walls are generally made of steel reinforced concrete or concrete blockwork timber sleepers and boulders.
Timber queensland technical data sheet 9 timber retaining walls revised march 2006 page 1.
