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CD 534: Chamber Tops and Gully Tops for Road Drainage and Services, now at version 0.2.0. is here Find out more
Precision engineering for modern utility networks PulsePulse delivers exceptional strength, stability and long-term performance in demanding carriageway environments. Developed to meet stringent telecoms sector requirements and refined for highway use, it provides whole-life value and can contribute to carbon reductions across busy networks. 
A new generation of designAt the heart of Pulse is an inverted T-flange frame section†, developed to improve bedding stability and protect the chamber structure while balancing stresses that might lift or crack bedding mortar at the outer edge. It represents a new generation of frame design, built for long-term structural integrity, compatibility with reinstatement materials, and dependable performance even in the most demanding service conditions. By maintaining bedding stability and reducing the frequency of reinstatement, Pulse helps lower whole-life costs and cut the embodied carbon associated with repeated maintenance. Developed through one of the most rigorous client-led testing programmes we’ve ever undertaken, Pulse has been empirically validated through stress evaluation of bedding mortars, impact testing and intensive field simulations. These trials replicated in-service conditions, subjecting Pulse to repeated impact loading and embedded stress monitoring in live network installations to capture real-world behaviour beyond the requirements of BS EN 124-2. The results speak for themselves: a high-performance, structurally balanced system that delivers stable, consistent performance in high-intensity carriageway applications. Supported by verified Environmental Product Declarations (EPDs), Pulse offers proven durability, measurable sustainability and reduced whole-life impact – providing long-term value for asset owners and the networks they manage. 
Performance verified through independent testingPulse’s design has been validated beyond the standard. Through a programme of laboratory and full-scale trials, including stress analysis and impact testing, Pulse demonstrated clear performance advantages over traditional welded-frame systems. The results speak for themselves.
Engineered for lasting strengthPulse has been purpose-designed to deliver dependable strength and structural stability in demanding carriageway environments. Every aspect of its design has been developed to prevent the common causes of ironwork failure, from cracking to bedding fatigue. Each large frame is cast as a single, non-welded unit, removing weak points that can lead to early-life damage. The inverted T-flange frame and I-beam reinforced covers distribute loads evenly, directing forces vertically into the foundation to reduce localised stress that can damage bedding mortars. Computer analysis and full-scale trials guided the geometry, improving rigidity under repeated heavy traffic. These gains extend bedding life, sustain non-rock performance and deliver the lasting strength needed for high-intensity carriageway environments. Non-welded constructionEach large frame (CW2 & CW3) is cast as a single unit, removing weak points that can cause cracking and early-life failure. Inverted T-flange frame†Distributes loads evenly to protect the chamber and bedding mortar, reducing stress concentrations. I-beam cover structureReinforces rigidity within the covers, minimising seat wear under repeated wheel loads. E600 availableDesigned up to E600 load class for high-intensity traffic conditions and demanding carriageway locations 
Pulse 7-year warrantyWhen installed with either Wrekin UniPak® rapid-set polymer resin bedding mortar, or flowable, CD 534 compliant bedding mortar, the Pulse range is available with a 7-year product warranty*. Due to its unique design and overwhelming success in the local authority and utilities sector, Pulse is the proven choice for durability and longevity for highway ironwork installations. View further warranty information * Subject to terms and conditions 
Designed, Tested and Proven in the UKSustainability and whole-life valueDesigned, tested and proven in the UK, for the way the UK builds and operates. Pulse has been developed around the specific demands of our infrastructure: the way our chambers are constructed, how our roads are built, the intensity of our traffic and the impact of our changing climate. By addressing these real-world conditions, Pulse delivers lasting performance and lower whole-life impact. It reduces bedding stress, maintains non-rock stability under repeated wheel loading, and helps extend maintenance intervals. The result is lower whole-life carbon, fewer interventions and dependable performance that supports better outcomes for asset managers, contractors and road users alike.
Every Pulse product is supported by a verified Environmental Product Declaration (EPD), providing transparent data on embodied carbon and environmental performance. These EPDs allow specifiers and asset owners to make informed, evidence-based decisions that align with sustainability and whole-life value objectives. Proven in live networksPulse was developed through the most extensive programme of full-scale trials and live-traffic evaluations we have ever undertaken. The outcomes speak for themselves, demonstrating substantial reductions in bedding stress and improved long-term stability when compared with alternative welded-frame designs. Those learnings are embedded throughout the Pulse range, delivering proven durability and resilience in real-world UK network conditions. 
Designed for utilitiesTailored to the water, telecoms and energy networksEvery detail of Pulse has been developed with the unique needs of UK utility networks in mind. Designed specifically for telecoms, water and energy chambers, it delivers the strength, stability and reliability these critical networks demand. We work closely with leading network operators, including Openreach, Thames Water, Vodafone, Severn Trent, United Utilities and UK Power Networks. We’ve developed Pulse around real installation practices and performance expectations. By protecting chamber walls and bedding materials from stress and deformation, Pulse maintains network integrity and reduces the likelihood of costly reinstatements. For asset owners and contractors, this means a solution that not only meets specification and compliance standards, but also supports operational efficiency. Pulse reduces whole-life cost, lowers maintenance frequency and provides the long-term resilience that modern infrastructure networks depend on. 
Built for longevity, designed for ease of installationDesigned for life on the roadPulse is suited to highways and carriageways with frequent heavy loading, as well as utility and telecoms networks requiring stable, low-maintenance access solutions. It is a strong choice for local authority resurfacing schemes and commercial developments where long service life and compliance are essential. Installation and compatibilityPulse is designed for use with the UniPak bedding mortar or flowable, CD 534 compliant bedding mortars. The frame geometry supports accurate alignment and improved mortar keying, while standard lifting points and keyways help make handling safer and more predictable on site. Where locking is required, the inboard mechanism remains protected within the frame during installation and service. 
Engineered to protect the chamber and the bedding beneathInverted T-flange frame for balanced, long-term stabilityAt the core of Pulse’s performance is its inverted T-flange frame, a new generation of frame design developed through extensive finite-element analysis, field trials and live-traffic evaluations across UK networks. The profile provides continuous support around the frame edge, reducing deflection and distributing loads evenly around the whole frame into the bedding mortar and chamber structure. This geometry balances stresses across the frame. Preventing the outer edge lifting that can crack bedding mortar and the inner edge drop that can damage chamber walls. Independent testing confirmed up to 78% reduction in peak bedding stress and around 13% less deflection compared with welded-frame designs. †Only available on Carriageway 2 and 3 variants. 
Strength and stability where it’s needed mostI-beam reinforced covers for superior rigidityThe Pulse cover structure features universal beam reinforcement (otherwise known as I-beams). Engineered to deliver exceptional rigidity and stability under repeated wheel loading. This design strengthens the cover without unnecessary weight, helping it resist flexing and seat wear that can develop over time. By controlling deflection, the I-beam structure ensures consistent load transfer between the cover and frame, maintaining a rock-free seating and reducing long-term fatigue. The result is a robust, stable assembly that protects the integrity of the chamber below and extends service life, even in the most demanding carriageway environments. 
Secure by design, protected for performanceInboard locking system for lasting protectionPulse features a robust inboard locking system housed safely within the frame, which is designed to accept a padlock. It offers long-term security and reduces vulnerability to damage or interference. By protecting the locking mechanism from exposure to traffic and environmental wear, the system maintains consistent performance throughout its service life. This fully integrated design ensures the lock remains secure, reliable and easy to operate, even in demanding carriageway conditions. For network operators and asset owners, it provides added confidence that critical infrastructure remains protected against unauthorised access and premature wear, without compromising installation efficiency or ease of maintenance. 
Engineered for safer, faster handling on siteIntegrated frame lifting points for safer installationsPulse includes a purpose-designed mechanical lifting points built directly into the frame, enabling safe, balanced and controlled handling during installation. This integrated feature removes the need for external lifting attachments, reducing manual handling risks and helping installers position the frame accurately and efficiently. By providing a secure lifting location, the system ensures even weight distribution, minimises strain on the frame, and supports precise alignment with the prepared bedding. The result is a faster, safer and more consistent installation process that protects both the product and the people handling it on site. 
Designed with practicality and safety in mindSmart details that make a real differencePulse has been carefully designed to make installation and maintenance safer and more efficient. Every feature has a purpose, from clearly marked details to indexing points that support quick, accurate installations and maintenance. Distinctive feature markings and iconography make product type, loading and orientation easy to identify, while the dedicated ID bolt and RFID location support asset tracking and network management. The safety keyway prevents accidental disengagement during lifting, improving on-site safety and usability. For installers, the ScrewLift location in the flange supports fast, precise alignment during installation. While the rounded flange edges and multiple frame gussets enhance the strength and longevity of the installation. Together, these practical refinements help reduce risk, improve accuracy and ensure a consistent, professional finish every time. Precision levelling for stronger, faster installationsCompatible with ScrewLift rapid frame levelling systemPulse is fully compatible with our ScrewLift rapid frame levelling system, developed to make manhole frame installation faster, safer and more precise. The ScrewLift mechanism allows installers to accurately adjust frame height and alignment by hand, with an Allen key or socket, ensuring the frame sits perfectly level with the surrounding surface. By controlling the correct bedding thickness, ScrewLift helps prevent voids, bridging and uneven load transfer, supporting CD 534-compliant, long-life installations. It works with all bedding materials, including our UniPak rapid-set polyester resin mortar and flowable mortars such as Instarmac Envirobed® CD 534. ScrewLift™ UniPak® 
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