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Foundation Engineering

Retaining Wall Design

We use our own proprietary Design Risk Matrix and in-house design tools to create the most cost effective, safe and efficient retaining wall designs.
Based on the matrix and the supplied draft building plans, we can compile a site-specific plan. This covers several design considerations:

  • Proposed wall type (materials and height)
  • Location in comparison to other structures, boundaries, and services
  • Soil classification
  • Loads
  • Australian standards and government regulations
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When is it required?

A retaining wall design is not always needed. But if the wall is 800mm or above, you’ll usually need an engineered design as per AS4678 to ensure council approval, longevity of the wall, and peace of mind.

The design gives your builder precise specifications to follow. We recommend using a builder who is suitably licensed to build retaining walls.

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What's included?

A registered professional engineer will compile and sign your PDF report. The design details typically include (where applicable):

  • Footing depths/widths
  • Material and section sizes
  • Reinforcement detailing
  • Concrete strengths
  • Pier layouts
  • Design assumptions and construction notes

Experience you can trust

There isn’t a retaining wall we haven’t seen or designed. We have years of experience in providing varied and custom retaining wall designs to suit client needs.

Optimal pre-design investigation

STA’s own Risk Matrix determines the level of engineering analysis and geotechnical testing. This reduces engineering time, meaning faster turnaround that saves you time and money.

Clear process

Our clear, consistent, repeatable processes help to build a better client–engineer relationship.

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One engineer for all your needs

Every building project is different, requiring a combination of engineering disciplines. From bottom to top, our engineers can work on soil testing and foundations, all the way up to frame and roof truss design and even inspections. We believe these shouldn’t be thought of as separate, unrelated services.

Whether you’re renovating, extending, building a brand new home, or putting in a pool, you can gain significant benefits from understanding (in advance) the full range of engineering services you might need — and from using the same engineer for all these services.
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Key advantages of integrated services

STA is a one-stop engineer with a service range that delivers three key advantages:

  • Save time and money

Pre-planning your engineering needs means you won’t have to keep re-booking an engineer when you need a particular service. It creates efficiencies that cut service times and save you money by pulling together the services you’ll need, at a lower overall price.

  • Enjoy engineering continuity

With all your engineering done by a single organisation, your consultants tap into a deeper knowledge of the site and the project, which leads to high quality outcomes, with more opportunities for innovative solutions.

  • Less risk, more reliability

While STA always takes legal responsibility for its engineering designs, an up-front engineering services package makes it easier to trust our work with a strong mutual commitment, and reduced risk of potential interruption or delay.

How it works

Engineering consideration – We help you think about your project in engineering terms. What specific services might you need?
Packaged plan – We develop a plan that packages up all the engineering services you need for your individual home or build project.
Prescheduled services – With each service pre-scheduled, we can work more closely with you over the life of the project.

Explore our engineering services

Whether you’re a builder, developer, architect or owner, STA has the size and range to cover every possibility, with a team of experts in every engineering specialty. Explore more specific info on:
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More on foundation engineering

We are specialists in custom foundation design, providing site-specific designs for residential and commercial projects.
More about our foundation engineering
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