Cantilevered tilt up walls 13.
Retaining wall specifications timber.
Wood retaining walls 14.
Pier and pile foundations 11.
The heartwood of naturally durable species durability class 1 that are suitable for retaining walls include ironbark grey gum tallowwood forest red gum and bloodwood.
Walls up to one metre in height follow a basic design and can usually be constructed using standard proprietary wall systems.
These retaining walls have been used for a long time in australia.
The purpose of this technical data sheet is to provide sufficient detail to enable the correct design and.
10 batter as shown.
Gabion walls 16.
One of the most important retaining wall specifications to consider is the load that the wall will need to bear.
On a steep site they give your garden structure highlight natural features and.
Retaining walls up to 1 m high timber retaining walls up to one metre high can be constructed as shown in figure 1.
Soil bearing and stability 8.
Walls exceeding 400 mm high should have a 1.
Building codes and retaining walls 5.
If you have your retaining wall built figure about 15 per square face foot for a timber wall 20 for an interlocking block system or poured concrete and 25 for a natural stone wall.
Retaining walls can be constructed with various materials from stone to wood.
Preparing a troublesome site one that includes clay soil or a natural spring for example can raise costs substantially.
Some materials can be used to create curves.
Several factors add to the load on a wall including lateral earth pressure from soil surcharge loads axial forces wind forces and impact loads.
Forces on retaining walls 6.
Initially constructed from original old railway sleepers our research tells us that around 15 years was a fairly average life span for these class 1 timber hardwood walls.
Designing the cantilever wall stem 9.
Retaining wall systems include cantilevered round or sawn timber mass wall and crib wall construction.
This determines the necessary dimensions of the sleepers and posts.
In ground durability class 1 timber species or timber preservative treated to h5 should therefore be used.
The natural appeal and versatility of timber is ideal for this application.
Counterfort retaining walls 12.
Earthquake seismic design 7.
But a retaining wall made of timber will be straight.
An engineer will be required to plan and design walls greater than one metre including the footings and drainage.
Retaining walls in particular contribute significantly to the surroundings when constructed from timber.
Member sizes and post embedment depths shall be as outlined in tables 1 and 2 for preservative treated softwood and hardwood respectively.
Timber is a preferred material for landscaping purposes.