| 55
Above left: When factoring in the carbon storage properties of timber, the chassis achieves a carbon-negative status of -42.3kgCO2 Above right: Each chassis is tailored to meet the specific load and structural requirements of the unit it supports
e
The primary objective behind the development of this timber chassis was to create a sustainable and environmentally friendly alternative to conventional steel or galvanized frames commonly used in holiday units. By utilising responsibly sourced materials, the timber chassis significantly reduces carbon emissions compared to its steel counterpart. A carbon analysis study conducted by Arete Zero Carbon highlighted the difference: a steel chassis produces 1,777.44kgCO2
e during its production
phases (A1–A3), while the WJ timber chassis generates only 465.92kgCO2
e. When factoring
in the carbon storage properties of timber, the chassis achieves a carbon-negative status of -42.3kgCO2
e, making it a ground breaking
solution for reducing the environmental footprint of holiday homes. This can support manufacturers in reducing upstream supply chain emissions, which are critical under Category 1 of the Greenhouse Gas Protocol. This data underscores the chassis’ potential to revolutionise the market by addressing both sustainability and performance needs. Extensive testing and development processes have validated the timber chassis’ structural integrity and performance under a variety of conditions.
WJ Group collaborated with two of the UK’s leading holiday home manufacturers and an independent structural consultant to rigorously test the chassis. The testing process began with the creation of prototypes, followed by their integration into the manufacturing process for static caravans. Structural deflection testing revealed that the timber chassis exhibited significantly less deflection compared to a steel chassis under similar conditions, ensuring better overall stability. This reduced deflection was especially beneficial during siting, where the timber chassis demonstrated superior retention of structural integrity, simplifying the installation process.
Ground transport trials evaluated the chassis’ performance over different types of terrain, while transportation testing simulated the loading and unloading of caravans from trailers. These trials confirmed that the timber chassis could withstand the stresses associated with movement and handling without compromising its durability.
Field testing on materials and weathering is ongoing, with one chassis currently sited on the East Yorkshire coast. This location, known for its exposure to salty air and harsh weather conditions, is providing valuable insights into the long-term impact of environmental factors on the timber. Additional development work is being conducted to compare the durability of marine plywood webs with existing weather-sealed OSB, further enhancing the chassis’ resilience. The timber chassis has already gained traction among environmentally conscious manufacturers who value its sustainability benefits.
Drawing on WJ Components’ extensive experience in designing and manufacturing customised roof trusses for the leisure industry, the timber chassis benefits from the same level of precision engineering and
attention to detail. Each chassis is tailored to meet the specific load and structural requirements of the unit it supports, ensuring optimal performance.
WJ’s technical team collaborates closely with manufacturers’ design and engineering teams to understand the unique parameters of each project, delivering solutions that align perfectly with their needs.
WJ Group continues to push the boundaries of timber engineering and sustainable design. With its patent approvals and demonstrated success in rigorous testing, the timber chassis represents a significant leap forward in eco-friendly solutions for the leisure market. It is not merely an alternative to steel but a bold statement of the industry’s potential to embrace sustainability without compromising on quality or performance.
As the demand for greener construction materials grows, WJ Group is poised to lead the way with innovative products that meet the needs of both manufacturers and environmentally conscious consumers. This timber chassis exemplifies the Group’s dedication to innovation, precision, and sustainability, offering a glimpse into the future of holiday home construction. ■
Above: Trials have confirmed that the timber chassis could withstand the stresses associated with movement and handling without compromising its durability
www.ttjonline.com | January/February 2025 | TTJ
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64 |
Page 65 |
Page 66 |
Page 67 |
Page 68 |
Page 69
