Expert Structural Engineering and Design in Queensland
Ostanes provides structural engineering solutions across Queensland, turning architectural designs into safe, buildable structures.
We specialise in delivering clear, compliant documentation for residential and commercial projects—from custom homes to multi-storey buildings—helping architects, builders, and certifiers move faster from concept to construction.
Commercial Structural Design
Multi-story framing, lateral wind/seismic resisting systems, and long-span floor systems.
Industrial Shedding
Portal frame optimization, crane runway beams, and dynamic loading considerations.
Residential New Builds
Custom architectural homes, cantilevers, voids, and integrated timber/steel framing.
Foundation & Retaining Design
Soil reactivity footing systems, raft slabs, piers, and retaining structures.
Our Structural Engineering Approach
Our engineering capabilities cover a comprehensive suite of structural services, specifically tailored to the unique environmental and loading challenges of Queensland.
Guaranteed Structural Efficiency
We systematically review architectural plans to identify material redundancies. Our engineering optimization reduces steel and concrete costs by up to 15-20%, making your project more cost-effective to build.
Exact Documentation Turnaround
We establish clear, binding timelines at project kickoff. Our streamlined drafting and engineering workflow ensures that structural documentation is delivered on schedule, preventing costly construction delays.
Clash Detection in Drafting
We build comprehensive 3D models of structural framing and overlay them with architectural drawings. This proactive clash detection identifies conflicts before documentation is finalized, eliminating expensive on-site rectifications.
Certifier & Compliance Liaison
We leverage our experience with building tribunals and compliance bodies to ensure that your plans easily pass certifier audits, addressing complex municipal zoning rules and building code nuances.
Our Engineering Methodology & Compliance
At Ostanes, our core engineering methodology is defined by precision, mathematical optimization, and rigorous compliance. We utilize advanced 3D structural modeling software and Finite Element Analysis (FEA) to analyze structures under complex multi-axial loading states. Rather than relying on conservative, manual approximations that result in over-engineered designs and construction material waste, our computational analysis models the exact stress distribution throughout the building. This high-fidelity modeling identifies zones of low stress where material thickness or structural framing can be reduced, allowing us to specify lighter steel members and reduce concrete volumes without compromising safety.
This mathematical optimization not only achieves significant cost savings for our clients but also facilitates the seamless integration of structural elements within sophisticated architectural envelopes. We ensure that structural framing—such as columns, bracing, and transfer beams—remains concealed within walls and ceilings, preserving the architectural aesthetics without compromising structural safety.
Every project we engineer strictly complies with the National Construction Code (NCC) and is designed to satisfy all relevant Australian Standards. We design and certify in compliance with:
- AS 1170 (Structural Design Actions): We calculate precise dead, live, wind, and seismic loads. This includes designing for Queensland’s high wind zones (Region B and C) and cyclone parameters. We model wind actions to AS 1170.2, determining local pressure coefficients for roof cladding and structural framing.
- AS 3600 (Concrete Structures): We detail reinforcement layouts, design for deflection limits, and execute crack control and concrete durability calculations.
- AS 4100 (Steel Structures): We evaluate member capacities, design connections (welded and bolted), and verify deflection limits under serviceability loads.
- AS 1684 (Residential Timber-Framed Construction): We verify bracing designs, tie-down connections, and span tables for timber framing elements.
By combining advanced FEA modeling with strict adherence to Australian Standards, Ostanes delivers engineering documentation that is highly respected by certifiers and builders across Queensland, ensuring a smooth building approval process and structural resilience. Our calculations are backed by professional sign-off and Form 15 compliance certificates, giving you complete legal and technical security.
Areas We Serve
Ostanes provides professional structural engineering and design services throughout Southeast and regional Queensland. Our engineering team has a deep understanding of local site conditions, council regulations, and soil profiles across the state. While we operate state-wide, we provide dedicated engineering documentation and site inspections for major metropolitan regions:
- Brisbane
- Gold Coast
- Sunshine Coast
- Logan
- Ipswich
- Toowoomba
- Gympie
- Nambour
- Warwick
- Beaudesert
Ancillary Structures We Design
Ancillary structures often sit around the main building but play a big role in safety, stability and daily use of your property. We provide Structural Engineering Design for Ancillary Structures such as:
- Pools
- Retaining walls
- Decks
- Carports
- Verandas, patios, pergolas and sheds
Designed for Real Conditions
Each design is tailored to:
- Your site and soil conditions
- The chosen materials (timber, steel, concrete, masonry, etc.)
- Local wind loads and climate conditions
Pool Structural Engineering Design
Pools place significant loads on surrounding soil and structures. Proper engineering helps prevent cracking, movement and long-term damage.
What We Cover for Pools
Structural design for concrete, fibreglass and above-ground pools
Wall and slab thickness, reinforcement and footing details
Consideration of nearby boundaries, retaining walls and existing structures
Our documentation supports smooth council approval and gives builders clear information to construct safely.
Retaining Wall Design
Retaining walls are critical for managing level changes, supporting driveways and protecting buildings from soil movement.
Types of Retaining Walls We Design
Timber retaining walls
Concrete sleeper retaining walls
Masonry and block retaining walls
We consider:
Soil pressure and drainage
Wall height and loading
Foundation and footing design
Deck Engineering Design
A deck should feel solid, safe and durable, whether it is at ground level or elevated. We design decks that handle real-life use, including people, furniture and weather exposure.
Key Elements in Our Deck Designs
Beam, joist and post sizing
Footing sizes and depths
Safe connections to houses and other structures
Specific consideration for decks near pools
Carport Structural Design
Carports must resist wind, rain and long-term wear while remaining stable and secure. We engineer both attached and freestanding carports.
Our Carport Design Focus
Timber, steel or hybrid framing solutions
Structural layout and member sizing
Footing and anchoring details
Compliance with wind and structural loading requirements
Other Ancillary Structures
Beyond pools, retaining walls, decks and carports, we also provide engineering for a range of outdoor and small structures.
Additional Structures We Support
Verandas and patios
Pergolas
Sheds and garden structures
Alfrescos and outdoor rooms
All are designed to be safe, durable and compliant with relevant Australian codes.
Residential Structural Engineering Services
In addition to Structural Engineering Design for Ancillary Structures, we assist with broader residential projects.
Typical Residential Projects
New homes and extensions
Renovations and wall removals
Structural upgrades and remedial works
We aim to keep the process clear and stress-free, explaining any structural requirements in simple terms.
Commercial & Light Industrial Support
We also work on selected light commercial and industrial projects where ancillary or small structures are required.
Examples of Light Commercial Work
Small warehouses and workshops
Storage buildings and canopies
Structural checks for minor fit-outs
Our focus remains on practical, buildable and compliant designs.
Our Process
We follow a straightforward process to keep your project moving efficiently.
1. Initial Consultation
We review your plans, site information and council or certifier requirements. At this stage, we clarify scope, timelines and any key constraints.
2. Engineering Design & Documentation
We prepare structural calculations, drawings and reports tailored to your project. The documentation is formatted for easy use by builders, certifiers and councils.
3. Ongoing Support
If questions arise during approval or construction, we are available to clarify details and provide guidance where needed.
Start Your Ancillary Structure Project with Confidence
Whether you need engineering for a pool, retaining wall, deck, carport or any other ancillary structure, we are ready to support you with clear, compliant and practical design.
Contact Ostanes Engineering today to discuss your project and receive a tailored Structural Engineering Design for Ancillary Structures.
Get In Touch
Let’s Build Something Great Together!
At Ostanes Engineering, we’re here to help bring your project to life. Whether you need structural engineering, compliance solutions, or project management, our team is ready to provide expert guidance tailored to your needs.
We prioritize cost-effective solutions without compromising on quality, safety, or precision. Let’s discuss how we can support your project with innovative, reliable, and fully compliant engineering services.
- (+61) 411 631 777
- info [at] ostanes-engineering [dot] com
- Sunnybank, QLD 4109
- Denham Court, NSW 2565
