Multi-Discipline Engineering - Why Your Structural, Civil, and Geotech Should Be Under One Roof

The Coordination Problem

On a typical multi-storey development in Sydney, three engineering disciplines are critical:

• Structural engineering - The building frame, slabs, columns, walls, foundations
• Civil engineering - Stormwater, drainage, road access, external works, council interface
• Geotechnical engineering - Ground investigation, shoring design, foundation recommendations

Many developers engage three separate firms for these three disciplines. On paper, it seems reasonable - specialisation, competitive pricing, choice. In practice, it creates problems that cost far more than any fee savings.

Where Things Go Wrong

1. The gap between geotech and structural. The geotechnical engineer provides a report with foundation recommendations. The structural engineer interprets those recommendations and designs the foundations. But what if the structural engineer's foundation loads exceed what the geotech engineer assumed? Who reconciles the difference?

When geotech and structural sit in different firms, this reconciliation happens through formal correspondence, which takes time and can miss nuances. When they sit in the same firm, it happens across a desk.

1. The gap between structural and civil. The structural engineer designs the building substructure. The civil engineer designs the stormwater drainage. But the stormwater pipes run through the structural zone, penetrating foundation walls and connecting to council infrastructure. Who coordinates the penetration locations, pipe support details, and waterproofing interface?
2. Responsibility gaps. When three firms are involved, there are always grey areas at the boundaries. Who is responsible for the retaining wall that functions as both a shoring element (geotechnical) and a building wall (structural)? Who designs the slab on ground that serves as both a foundation element and a drainage plane?

The Multi-Discipline Advantage

At ACSES Engineers, we provide structural, civil, and geotechnical engineering under one roof. Here's why that matters:

1. Seamless coordination. Our structural, civil, and geotech engineers work together from day one. Foundation design is informed by actual geotechnical parameters, not conservative assumptions. Shoring design considers the building structure, not just the soil. Civil drainage is coordinated with the substructure, not designed in isolation.
2. Single point of responsibility. There are no grey areas. If it's engineering, it's our responsibility. No finger-pointing, no "that's not our scope" responses to builder queries.
3. Faster turnaround. Internal coordination is faster than inter-firm correspondence. When the builder asks a question that spans disciplines, we can provide a coordinated answer within hours, not days.
4. Better outcomes. When the person designing the shoring is also designing the basement walls, they can design a system where the permanent walls replace the temporary shoring. That integration saves the client significant money.

The Holistic Approach

This multi-discipline capability supports our philosophy of holistic engineering. We don't just design the structure. We consider the ground it sits on, the drainage around it, the roads accessing it, and the council requirements governing it.

Engineering is not a collection of isolated disciplines. It's an integrated system, and it works best when it's treated as one.

George Khalil, Principal Engineer