Residential

At North Bondi, the Sol Apartments project showcases refined coastal design supported by thoughtful engineering. Working with HSN Property Group, KPA Architects, and BKH Interiors, Partridge detailed the insitu concrete slabs and precast wall panels, including a cantilevered first-floor awning that required careful load analysis. Integrated lighting within the balcony soffits added another layer of coordination between structure and aesthetics. Below ground, the basement carpark is excavated into sandstone bedrock, requiring solutions for excavation support, surrounding pressures, and drainage. Partridge also reviewed key interface zones to ensure stability, buildability, and long-term performance.

Partridge provided structural engineering for the Moruben Road residences in Mosman, designed with Peter Tout Architect and Turner Hughes Architects and built by David Campbell Building. The steep hillside site required excavation of more than 3,000 tonnes of soil and rock, including a 10-metre-deep lift shaft and tunnel. Partridge adopted temporary batters and vertical rock cuts to avoid shoring piles, simplifying excavation while maintaining safety. Reinforced concrete slabs on load-bearing masonry and Dincel walls supported lightweight steel and timber roofs with 3-metre double cantilevered canopies. A key feature of the project is the central stair, engineered using finite element analysis to minimise structural depth while maintaining the architectural intent. The stair consists of a steel box stringer with cantilevered steel plate treads, each designed to support a glass balustrade that also cantilevers from the plates.

Partridge worked with the Cave Urban team on this creative home extension project, which presented a series of delightfully complex engineering challenges. The curved concrete pergola roof, supported at one end by a steel-framed cabana and at the other by a single concrete column, required precise detailing and analysis. The concrete transfer slab, integrating the new structure with the existing house, was essential for supporting the cabana and providing access to the pool. To achieve the desired curved forms, reinforced concrete was employed for the pergola roof, transfer slab, and stairs. Cost-effective structural steel framing was used for the cabana roof. Concrete columns were optimised for minimal diameter and seamlessly integrated into the slab soffits through mushroom head detailing. The spiral stair, with its unique U-shaped cross-section, was designed to span without intermediate supports. The project demanded well executed reinforcement detailing and installation concrete formwork installation and well managed structural steel installation by the site team.

The Harbour House in Sydney is a product of global teamwork – designed by SAOTA, TKD Architects, and Partridge. The site, born from the demolition of four existing properties, provided a fresh canvas for an ambitious architectural vision​. A stone-clad entryway canopy utilises tapered steel beams for support. Isolation springs support a unique suspended reinforced concrete pool above the mezzanine floor. The first-floor boasts a cantilevered awning (functioning as a horizontal truss) and the entertainment terrace features a double cantilever composite concrete slab supported by steel beams. Overall, the Harbour House project incorporates international design influences alongside the valuable input of local architects, engineers, and builders. This collaboration ensured the project addressed its challenges with innovative solutions.

This Northcote house is a beautiful reflection of environmental sustainability. Using cross laminated timber (CLT) as the main floor, wall and roof elements, this house has set the standard in significantly reducing its carbon footprint compared to its neighbours thanks to all of the carbon that is sequestered  away in the timber. The lightweight nature of CLT and off-site fabrication meant the house could be rapidly assembled with just a small site team. Added to that, with the concealed CLT connections ,the CLT panels could be exposed as a feature, showcasing a clean and simple structural  form whilst giving the home a ‘natural’ feel. With a CLT structure and the use of recycled bricks, the house provides a unique quality of living! Partridge were engaged to carry out the structural analysis on the building and to design and certify the structural safety and performance of the building. We ensured the CLT was used efficiently by even pushing one of the upper storey CLT walls to act as both a wall and a deep beam in order to create a large open space on ground level without the need for conventional steel support structure. Partridge was also engaged to provide civil design and documentation including the inground stormwater drainage requirements.

Working in close collaboration with architect Rolf Ockert, Partridge carried out the structural design for a complex, primarily concrete house in South Coogee, situated above a ravine over the ocean. The lower ground slab was designed to be suspended approximately 6m across the ravine, and relies on some support from an existing masonry sea wall. The architecture involved challenging angles, large cantilevers, and highly detailed exposed concrete with cast in services, rebates for glazing, and nearly every column being a different geometry. Winner of CIA Award for Excellence, Residential Buildings.

Treetops House is a project that has been recognised with the NSW and National Award for excellence in concrete design for the fifth consecutive time. This two-story home beautifully demonstrates the versatility of concrete through its off-form walls, concrete roof, polished floors, and striking stair. Innovative use of conventionally-reinforced concrete allowed for impressive spans, including a 9m clear span, highlighted by expressed joints, and smooth integration with other materials. The central stair is a key visual element, and thoughtful reinforcement ensures durability and low upkeep. The building also incorporates thermal mass and hydronic heating in the topping slabs for energy efficiency. Throughout construction, care was taken to preserve the site’s large trees, ensuring their continued growth. Treetops House illustrates the potential of concrete, skilled craftsmanship, and thoughtful design, creating a home that sits harmoniously within its treetop setting and landscape.

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