KOMBI modular systems provide access to rooftop HVAC plant at Mars Ballarat

KOMBI access stairs, platforms and crossover systems were installed at Mars Wrigley’s Ballarat production facility to enable access to the rooftop HVAC plant.


Access to the rooftop HVAC plant was hindered by large pipes, making maintenance extremely difficult for personnel. A sloping roof pitch added to the complexity of the project as did the tight clearances around, over and under the pipework.


Given the restricted access around the existing HVAC systems, the installer, PJM Engineering got in touch with the SAYFA design and engineering teams. Having never used KOMBI before, the installer was unfamiliar with the system. After assessing the project, the SAYFA team suggested KOMBI as an ideal solution.

“The modularity of KOMBI meant choosing this system for the project was actually a no-brainer,” commented Jeremy Parker, SAYFA corporate business manager, who took on the project management.

“When providing the client with a solution, it can be difficult for them to visualise exactly how it will satisfy their needs. With the use of the KOMBI Builda, we designed some initial concepts of the stair, platform and crossover systems. The KOMBI Builda outputs 3D models as well as various line drawings, which make the project come alive in the client’s eyes.”

Examples of the drawings produced at the conceptual stage by the KOMBI BUILDA.

Once these concepts were presented to the client and approval given, the SAYFA design team produced fully detailed and engineered design drawings specifically to accommodate the existing pipework and the degree of roof incline.

Kombi Crossover Drawing

Fabrication began on three KOMBI crossovers and an access platform and the components were delivered to site. PJM’s personnel easily carried out the installation without any trouble.

“Site measurements had been taken prior to manufacture but there are often miscalculations, particularly when dealing with intricate pipeline networks. With KOMBI, on-site modifications can be easily made using the patented KOMBI T-Bolt. This was definitely a comforting factor for the installer,” Parker noted.

“An additional benefit is that the installation of KOMBI stairs and platforms requires no specialist tools or on-site welding, which makes the job even easier,” he added.

Why KOMBI crossovers and access platform systems?

HVAC systems can often be a complex web of pipes and equipment, making access a major challenge.

When designing stairs, platforms and crossover systems to fit in with existing systems in these locations, taking exact measurements can be difficult. With traditional fully welded systems, incorrect measurements provided for manufacture can result in systems that may differ from the actual site conditions, resulting in installation problems as well as significant cost and timeline blowouts for correction.

KOMBI stair and platform systems are adjustable; should your system need some modification during installation, it can be easily done in situ without requiring a total system redesign.

For ease of installation, the patented KOMBI T-Bolt does away with the need for on-site welding and fabrication. Systems can be adjusted to cater for undulating land or uneven surfaces. With innovation behind its creation, the whole KOMBI modular system is designed to be flexible and installer friendly.

KOMBI systems are manufactured from lightweight aluminium, which offers several advantages over steel. Steel has long been the traditional material of choice throughout industry, so why should you select aluminium? Read Aluminium vs Steel – Which Should You Choose? where we provide a detailed and unbiased comparison.

Proudly Australian owned and manufactured, KOMBI modular aluminium stairs and platforms provide the answer when lightweight, easy to install systems are required for any project.