Built By Bison Ltd

Project SummaryAs part of a wider improvement to mountain biking trails at Calke Abbey in Derbyshire, a new timber bridge was required to safely carry cyclists across a natural low point in the landscape. Bison Bridges was selected to supply the structure in kit form to the appointed contractor, who completed the installation on behalf of the National Trust.The brief called for a durable, low-maintenance solution that would sit comfortably within a countryside setting, while withstanding the rigours of off-road bike use.Bridge Design & SpecificationThe finished bridge measures 9.0 metres in length and 2.1 metres in width—sized to accommodate modern trail requirements and ensure safe two-way traffic for cyclists. It features:Splayed Sure-Grip Duo Redwood Parapets – These add a subtle, visual openness and provide effective guidance for riders, while contributing to the bridge’s attractive appearance.Sure-Grip Duo Redwood Timber Deck – Chosen for its strength, weather resistance, and aesthetic value, the timber surface is suitable for year-round trail use including bauxite resin grip strips for public safety.Steel Beam Substructure – The hidden steelwork ensures long-term structural performance and stability with a 120 year design life, extending the lifespan of the bridge well beyond a timber-only design.Supplied as a pre-engineered kit, the bridge was easily transported and assembled on-site by the contractor, reducing both time and disruption.Visual Impact and Environmental FitPositioned within the historic and wooded surroundings of the Calke Abbey estate, the bridge integrates naturally into the landscape. The redwood timber contrast gently with the woodland, while the low-profile, splayed design avoids visual intrusion.This sensitive design approach ensured the structure met both the practical needs of the trail and the aesthetic expectations of the National Trust.OutcomeThe result is a robust and attractive crossing that enhances the trail experience for mountain bikers and estate visitors alike. By combining a steel-reinforced structure with a natural timber finish, Bison Bridges delivered a solution that’s both built to last and visually in keeping with its setting.

Project OverviewBison Bridges was commissioned to supply a robust, aesthetically pleasing bridge solution for a golf course in Stevenage, Hertfordshire. The brief called for a structure that could support both golf buggies and regular foot traffic, while minimising disruption to play and the adjacent public right of way.Design & Engineering ApproachTo meet the site’s logistical and functional demands, our team opted for a steel spliced-beam design. This approach allowed for:Simplified transportation and handling of bridge sectionsReduced crane time on siteMinimised disruption to the golf course and surrounding environment during installationThe bridge’s structure was topped with our SureGrip-Duo natural timber decking with anti-slip strips, chosen for safety, durability, and ability to complement the landscaped setting.Key FeaturesDual-purpose load capacity: Engineered and certified load bearing capacity for golf buggies and foot trafficSpliced steel beams: Enabled modular delivery and quicker assemblyLow-impact install: Delivered with minimal ground disturbance and no long-term access restrictionsAttractive finish: Timber decking blends seamlessly with the natural settingOutcomeThe result is a sleek, durable, and highly functional bridge that enhances connectivity on the course without compromising aesthetics or environmental integrity. Completed on schedule with minimal disruption, the project showcases Bison Bridges’ ability to engineer smart, site-sensitive solutions.

OverviewIn support of RSPB’s long-standing environmental goals, Bison Bridges was commissioned to replace a deteriorated timber platform and boardwalk at the popular Silt Pool Lookout in Middleton Lakes Nature Reserve. The brief was clear: design and install a more durable, low-maintenance alternative that would blend into the natural surroundings and have minimal ecological impact.As a separate requirement there was also a need for a 7.0m span bridge to replace an existing failed structure. The bridge location is well suited to a long-life Bison bridge; with tree cover and plenty of water around, a timber structure would have provided a lower initial purchase cost (for materials) but only a disappointingly short life span.Our solution was a 100% recycled and 100% recyclable Re-life plastic platform and boardwalk, supported by low-impact ground screw foundations — a perfect fit for wetland environments and nature-sensitive sites.Project RequirementsDismantle and dispose of an existing decayed timber platform and adjacent boardwalkSupply and install a like-for-like structure using sustainable, long-life materialsAvoid excavation or heavy machinery that could disrupt habitatsEnsure safe, non-slip public access and seatingDeliver a solution that aligns with the RSPB’s ecological valuesMaterials That Last: Why Re-life Plastic?For this project, Bison Bridges selected Re-life plastic, a high-quality material that is:100% recycled and 100% recyclableSplinter-free and rot-proof, even in consistently wet environmentsExtremely durable & live load tested to relevant Eurocodes, making it ideal for high-footfall public sitesLow-maintenance, with no painting or treatment required over timeBy replacing timber with Re-life recycled plastic, we ensured the new platform offers long-term resilience without compromising on appearance or function.Construction HighlightsOur experienced team delivered a complete removal and rebuild solution using a sustainable approach.Key build elements included:Ground screws, installed to layout drawing – no concrete, no diggingRe-life plastic bearers, bolted between supportsRe-Life joists, mounted on bearers and screwed for strengthRe-life deck boards, offering safe, slip-resistant accessRe-Life kickrails, for added security along both sides of the deckA dual-rail barrier and top leaning rail, creating a safe, comfortable viewing point3 fixed benches, crafted from Re-life plastic to replicate the original timber designA Low-Impact Foundation SystemTo support this eco-friendly structure, Bison Bridges used a ground screw foundation system, eliminating the need for excavation or concrete. Ground screws offer:Immediate load-bearing capacityMinimal ground disturbanceYear-round installation, even in wet or remote locationsReduced embodied carbon, compared to concrete basesTogether with recycled plastic materials, this approach provides a truly sustainable, long-life solution for outdoor platforms and boardwalks.Project OutcomeThe new platform and boardwalk deliver enhanced safety, stability, and environmental performance. Visitors to RSPB Middleton Lakes can now enjoy a splinter-free, rot-proof, and weather-resistant structure that fits effortlessly into the reserve’s landscape.With no ongoing treatment or upkeep required, the RSPB team can focus on conservation — not repairs.