Temporary works specialist, Altrad RMD Kwikform (Altrad RMDK), in partnership with Balfour Beatty VINCI, played a key role in the construction and repositioning of the A46 Kenilworth Bypass Box Structure, a critical element of the HS2 high-speed rail project. Project Overview The A46 is a major highway connecting Coventry, Kenilworth, and Leamington Spa to the M40. To accommodate the new HS2 rail line, a 14,500-tonne box structure was built adjacent to the carriageway before being manoeuvred into place beneath the A46. This approach significantly reduced disruption to road users by eliminating the need for up to two years of extensive roadworks. Spanning 42 metres wide, the structure required extensive planning and engineering to manage its substantial weight. The installation followed a carefully coordinated sequence: first, the construction of the structure itself, followed by meticulous site preparation to ensure the controlled and precise movement of the box into position. Advanced engineering techniques were employed throughout to maintain structural integrity while minimising disruption to local traffic and the surrounding environment. The Challenge This was the heaviest bridge move in the UK. To achieve this, specialist civil and structural engineering company Freyssinet designed a guiding raft and jacking mechanism to push the box at an average speed of 6.5 metres per hour, ensuring accuracy in positioning while safeguarding the structure’s integrity. Adding to the complexity, the project required a continuous supply of temporary works solutions and on-site equipment to facilitate the move. At its peak, over 800 tonnes of equipment were in use, with additional resources mobilised for night shifts to maintain progress and keep the operation on schedule. The Solution To support the structure’s significant weight, Altrad RMD Kwikform developed an innovative temporary works solution, adapting a combination of formwork and falsework supports. This combination of advanced and conventional techniques ensured both safety and efficiency throughout the operation. Superslim Soldiers, known for their exceptional strength-to-weight ratio, provided the primary structural support, ensuring stability in confined spaces and under tight time constraints. Alform beams were also installed in conjunction with the Superslim Soldiers to form a shutter configuration on either side of the structure, offering robust support during each controlled concrete pour. Tubeshor ground shoring props were applied in an inclined orientation at 45-degree angle along the outer edges of the formwork. A total of 22 Tubeshor props – 11 on each side – were deployed to supplement the primary support systems to facilitate landing of precast beams and deck casting. Until the structure was made fully integral, the cast inclined walls were not self-supporting. Throughout the project, a series of concrete pours were meticulously executed to reinforce the structure. These included ten inclined wall pours, six tulip pier pours, four base pours, and one deck pour. A summary total of over 4300m3 of concrete was used during construction of the overbridge. The temporary works solutions ensured stability throughout the curing process, allowing the systems to be removed efficiently upon completion. Altrad RMD Kwikform played a vital role in ensuring a seamless operation by supplying essential equipment around the clock and coordinating timely deliveries. This effort allowed the project to progress smoothly, meeting key milestones while minimising disruption to the local community. Stuart Grant, Senior Sales Representative at Altrad RMD Kwikform, commented: “We pride ourselves on being a one-stop shop for temporary works solutions. From Superslim Soldiers to Tubeshor, we were able to provide all the essential equipment and expertise under one roof, ensuring we kept to the programme and successfully delivered this highly complex project.” Sharon Liu, Sub Agent at Balfour Beatty VINCI added: “The success of this box push relied heavily on both the engineering expertise and the efficiency of the equipment used. Altrad RMD Kwikform’s ability to deliver and manage the right equipment on a tight schedule, and their hands-on expertise, directly contributed to the success of the offline build and completion of the bridge slide backfill, influencing reopening of the road 30 hours ahead of schedule.” “Working with the team at Altrad RMD Kwikform has been a pleasure. Our collaboration has been highly rewarding and has allowed us to successfully tackle complex challenges using innovative technical solutions, demonstrating the strength of our partnership and shared commitment to excellence.” For more on Altrad RMD Kwikform, please visit www.rmdkwikform.com. Building, Design & Construction Magazine | The Choice of Industry Professionals

Altrad RMD Kwikform (Altrad RMDK), is proud to mark its 90th anniversary this year, celebrating a legacy of engineering excellence and innovation in the temporary works industry. Founded in 1935, the company has been at the forefront of the construction industry, consistently setting industry standards in delivering efficient, reliable, and safe temporary works solutions to support construction projects worldwide. Evolving from its early days as a British scaffolding business to a global leader in above and below-ground temporary works today, Altrad RMD Kwikform is well known for its industry expertise. The company’s history is a rich tapestry of pioneering engineering, innovation, and strategic growth. Altrad RMD Kwikform’s roots stem from two pioneering firms: Mills Scaffolding (Kwikform) and The Douglas Group (RMD), two brands that have been fundamental in shaping who they are today. Mills Scaffolding, founded in 1935, became known for its innovative and safety-focused scaffolding solutions. After being acquired by GKN plc in 1983, it was rebranded as GKN Kwikform and introduced the iconic Kwikstage modular scaffolding system, revolutionising construction site efficiency. Later acquired by Bandt Plc in 1995, it became Kwikform UK Ltd. Meanwhile, the Douglas Group (formally known as R.M. Douglas Holdings Ltd), founded in the 1930s by Sir Robert McCallum Douglas OBE, a distinguished engineer and industrialist, excelled in temporary works solutions through its subsidiary R.M. Douglas Construction Ltd, which engineered an innovative steel shuttering system in response to post-war timber shortages. This development led to the formation of Rapid Metal Developments Ltd (RMD) in 1948. RMD expanded globally and developed renowned products such as Rapid Ply, Superslim Soldiers, and Megashor, earning industry recognition which led to the business receiving the prestigious Queen’s Award to Industry for engineering excellence in 1975. In 1999, RMD and Kwikform UK Ltd merged to create RMD Kwikform, combining their expertise to focus on comprehensive temporary works solutions. The company expanded globally throughout the 2000s and introduced 3D visualisation technologies in 2013 to enhance customer support. In 2015, RMD Kwikform entered the ground shoring market, broadening its capabilities even further. In 2021, RMD Kwikform was acquired by the Altrad Group, strengthening its global presence. Now operating as Altrad RMD Kwikform, the company remains a trusted provider of above and below ground temporary works solutions for projects of all scales worldwide. Mark Pickard, UK Managing Director for Altrad RMDK explained: “For nearly a century, RMD Kwikform has been at the forefront of engineering excellence, providing trusted solutions for projects across diverse sectors such as transport and highways, ground works and utilities, commercial and residential developments, to name just a few. “Celebrating 90 years is a remarkable achievement, and our journey has been defined by our dedication to pushing boundaries and the trust we’ve built with our partners and customers globally. We are proud to be a trusted name in the temporary works industry – recognised for engineering excellence, reliability and innovation. We owe our success to our employees, past and present, who have driven our mission to deliver world-class solutions with integrity and expertise. “Looking ahead, we remain committed to driving innovation through digital solutions, sustainable practices, and collaborative partnerships to continue delivering the highest quality of service to the construction industry. We will also continue to build on our strong foundations and maintain our well-established reputation as a trusted leader in temporary works.” For more on Altrad RMD Kwikform, please visit www.rmdkwikform.com. Building, Design & Construction Magazine | The Choice of Industry Professionals

PERI and BECOFORM have strengthened their collaboration with their partnership for UK-based projects. Through this partnership, PERI secures access to a high-quality and innovative product with significant growth potential in the UK market. BECOSTOP, a permanent stop-end system, plays a key role in PERI’s Construction Accessories range, designed to enhance construction projects through efficient installation, reduced material waste, and improved safety standards. Meanwhile, German-based manufacturer BECOFORM looks forward to gaining comprehensive UK coverage through projects facilitated by PERI along with the added benefits of technical and sales support, marking a significant milestone in its market expansion. With shared goals and complementary strengths, both companies look forward to a successful partnership focused on delivering exceptional service and value to their customers. Richard Fuchs & Tobias Klich, Managing Directors at BECOFORM commented:  “We as BECOFORM are proud to have a strong partnership with PERI UK. We greatly value the excellent collaboration, which has enabled us to successfully support a wide range of projects together. In particular, we would like to highlight the outstanding technical consulting and professional expertise of the PERI UK team, which plays a key role in providing optimal support for our products in the UK market. We sincerely thank the entire PERI UK team for their dedication and look forward to further strengthening our successful and trusted partnership with PERI for our products in the UK market.” Ian Hayes, PERI UK Managing Director commented: “We’ve established a solid foundation with the team at BECOFORM, and I’m excited about the opportunities this partnership creates for PERI UK. With the extended support from BECOFORM, we can deliver labour-saving solutions like BECOSTOP to our customers’ sites quickly. I’m confident that we can measurably increase site efficiencies through BECOSTOP, which will be game-changing for those seeking more modern and sustainable approaches to construction.” Building, Design & Construction Magazine | The Choice of Industry Professionals

Bespoke excavation support solution from Groundforce Shorco helps East Rudland Construction. Groundforce Shorco has provided specialist shoring equipment and design services for a complex excavation at a new housing development in North Yorkshire. Contractor East Rudland Construction is carrying out the groundworks and civil engineering for the project, which involves the construction of 25 executive-style homes for developer Gem Construction Ltd. One of East Rudland Construction’s tasks is the installation of a stormwater attenuation tank – a large underground reservoir to store rainwater and prevent surcharges into the nearby watercourses during periods of high rainfall. The attenuation tank is a large void made using ACO’s StormBrixx HD900 geocellular blocks encased within an impermeable 1mm LLDPE/HDPE membrane. Ground conditions on the site at Ulleskelf, near Tadcaster, are very challenging, says Steve Hayhurst, co-owner of East Rudland Construction. “The site has a very high water table which raises the risk of the groundwater floating the tank and lifting it out of the ground,” he explains. To prevent this happening, it was necessary to increase the depth of soil on top of the buried tank to hold it down. “We couldn’t bury the tank any deeper, so instead we had to change its shape,” says Steve. The tank was therefore redesigned, reducing its height by approximately one metre to allow a greater depth of fill on top. However, to maintain the same volume, the tank’s footprint had to be extended outwards to make up for the reduced depth. The redesigned tank now covered an area of approximately 25m x 17m but due to the space restrictions of the site layout, it has to be a complex and irregular shape in order to occupy the space available. To support the sides of the excavation, East Rudland Construction called in Groundforce Shorco. “I’ve worked with Groundforce for over 20 years and I know them well. I knew they would have the right solution,” says Steve. East Rudland Construction gave Groundforce Shorco the dimensions of the tank and Groundforce Shorco designed the temporary works solution, employing its modular Mega Brace system to support a steel sheet-piled retaining wall and braced with MP50 and MP150 hydraulic props. The Mega Brace system is designed so that beams of virtually any length can be assembled using the modular sections in different combinations. However, this excavation’s complex shape meant that certain lengths of the perimeter frame were little more than one metre in length – too short even for Groundforce Shorco’s standard equipment. Groundforce Shorco therefore provided bespoke lengths, modified to suit the application. To support the sides of the 3m-deep excavation, they supplied 170 lightweight GFI interlocking steel piles, each 6m in length. Larssen piles would normally have been the default option, but site constraints ruled this out, explains Steve. “Larssen piles are strong, heavy-duty sheet piles with a deep U-shaped cross section and we would have struggled to remove them after completion of the excavation without resorting to a larger excavator. “We couldn’t use a heavy excavator without risking damage to the installed tank. There was also very limited space in which to manoeuvre a large machine. Therefore, we had to find an alternative. “We used about 170 6m-long GFIs to stop water flow into the excavation. These are interlocking sheets offering a lighter option than the Larssen piles. They are much easier to remove from the ground.” To permit the lightweight GFI piles to be driven to the correct depth, East Rudland Construction pre-augured the perimeter of the excavation, loosening the soil and allowing insertion of the sheet piles. Another requirement was to carry out extensive frame-to-sheet-pile welding to prevent lateral movement of the frame. The irregular shape of the excavation meant there were numerous short lengths of frame subject to relatively high end-loads. Welding the frame to the sheet piles helped ensure rigidity. “We did all the installation ourselves, using our own plant and equipment, but we relied heavily on the design and technical support provided by Groundforce Shorco,” says Steve. “I kept in regular contact with their area manager Trevor Kendrick – whom I have known for years – and he was absolutely fantastic,” Steve continues. “The job started out as a potential headache but together we found a solution and made it work smoothly.” Building, Design & Construction Magazine | The Choice of Industry Professionals

Temporary works specialist Altrad RMD Kwikform (Altrad RMDK) has partnered with HS2’s construction partner for the Midlands, Balfour Beatty VINCI (BBV) and leading civil engineering and groundworks contractor, Galldris, to support the realignment of the A452 road over the new HS2 rail line. Project Overview The A452 Kenilworth Road Overbridge is a fully integral box structure with in-situ concrete base, abutments and wingwalls, spanning over 76 metres. This project is part of the vast HS2 landscape realignment of the A452 road over the new high speed rail line. The structure was one of the highest concrete pours undertaken by Altrad RMDK in Europe to date with a pouring height of 13.5 metres to one of the main wingwalls. The project’s success was critical in maintaining the momentum of the HS2 timeline, highlighting the collaborative efforts of all involved. The Challenge The project presented a multitude of challenges due to the complex shape and weight of the bridge. One of the main challenges was overcoming the complex geometric patterns used for the wingwalls. These wingwalls tapered in height along their length and also along their width across the base. Not only this, but the external shutters lean into the internal face to taper in width across the height. Where the wingwalls met the abutment walls, there was a complex movement joint that was required to allow for the expansion of the respective elements whilst still retaining the backfill that would eventually encapsulate the structure. The project demanded meticulous planning, coordination, and execution, with the additional pressure of adhering to a tight schedule. The Solution Altrad RMDK and Galldris worked in partnership, bringing together expertise and resources from both organisations, which proved instrumental in overcoming the complex challenges posed by the project’s scope. The contractor needed a solution that could be configured into various shapes and sizes, and so a custom specification was engineered using Superslim Soldiers and Alform Aluminium Beams to meet the complex requirements. Superslim Soldiers are designed to handle high loads, making them an ideal solution for a pour of this stature, as they were able to ensure that the formwork was able to remain stable under the pressure of the concrete. The beams helped maintain the structure’s shape and integrity during the entire pouring process, which was crucial in preventing deformities and ensuring the accurate formation. The Alform Beams provided a quick, durable and lightweight solution, allowing for simple installation, which was particularly advantageous on this high pour as moving and positioning formwork can be time and labour intensive. Despite being lightweight, Alform Beams withstood the substantial pressure from the concrete, working alongside Superslim Soliders to ensure that formwork remained intact and stable throughout the pour. This was important as it was essential that the solutions maintained the tapering shapes and dimensions of the wingwalls throughout the pouring process. Stuart Grant, Senior Sales Representative at Altrad RMD Kwikform, said: “The A452 Kenilworth Overbridge project highlights Altrad RMD Kwikform’s engineering capabilities and innovative solutions. Through partnerships, careful planning, and the use of advanced equipment, the project demonstrated the effective collaboration needed for this infrastructure development.” For more on Altrad RMD Kwikform, please visit www.rmdkwikform.com Building, Design & Construction Magazine | The Choice of Industry Professionals

Installing a large underground concrete structure is not an unusual task for any contractor working in the water industry. Whether it’s a filtration chamber, settlement tank or storage system, installing such a structure is always a challenge. It requires a large, deep excavation support that must be made safe for people to work inside, considering ground pressure, any adverse surcharge loadings, safe access/egress and emergency procedures. Normally, once the excavation has been completed and a shoring system installed to prevent the sides collapsing inward, then the construction team can erect the formwork, pour the concrete and install any associated components such as pipework, valves or culverts. At the Mannofield Water Treatment Works near Aberdeen, contractor ESD (a joint venture between Binnies, Galliford Try and MWH Treatment) is carrying out an £8 million upgrade for Scottish Water to improve the resilience and function of the plant and ensuring a continuous supply of fresh drinking water for the city of Aberdeen. The site team is nearing the end of the first phase of the three-phase scheme, part of which has involved the construction of a large in-situ reinforced concrete access chamber below ground. This was installed in early 2023 but, due to the complex sequencing of the works, while the chamber itself was completed, the pipework serving it was not installed at the same time, creating the design dilemma of supporting adjacent existing embankments and retaining walls and exposing the structure and pipe network to be installed. So earlier this year, specialist sub-contractor CHAP Civils was appointed to excavate the soil surrounding the chamber to expose three of its four sides and create space in which ESD could carry out the pipework installation in a safe working environment. “That’s the whole complexity of it,” says CHAP Civils’ contract manager Sarah Herd. “Ideally, the shoring should have been installed and both the chamber and pipework completed at the same time. Instead, we had to excavate around the chamber and find some way of supporting the sides of the excavation while the pipework was installed.” To find a solution to this challenge, CHAP Civils worked very closely with Groundforce Shorco, the specialist ground support division of hire group Vp plc to carry out Temporary Works Design solutions for approval with main contractor ESD. “My job is basically the middle-man, the temporary works co-ordinator liaising between the main contractor and the temporary works supplier,” explains Ms Herd. “We subcontracted the support structure design to Groundforce Shorco. CHAP has worked with Groundforce Shorco several times before and although I’ve only been with CHAP for four months, I had also worked with Groundforce Shorco in my previous employment,” says Ms Herd. The excavation extended around the north, east and west sides of the chamber with support needed on all three sides, plus a section to the south. The excavation was lined with steel sheet piles and braced on two levels to the concrete structure. The longest side, to the north, measured almost 24m in length; the eastern side was 13.3m long, the southern section 6.7m long and the western side was 7m long. The irregularity of the excavation was more of a challenge than the lateral forces imposed by the retained sides of the excavation, explains Ms Herd: “The excavation was about 5.250m deep and the ground conditions were fantastic – you couldn’t have better ground conditions, really, so the lateral loads were not massive.” This was just as well because, with the concrete chamber already installed, Groundforce Shorco had to provide a bracing design that transferred the loads from the sides of the excavation to the chamber itself. Groundforce Shorco produced the temporary works design for CHAP Civils and these were passed to ESD for approval. Akil Jasm, chief engineer for Groundforce Shorco, said: “We were expecting very high loads, to be honest, but when the contractor started to dig we soon realised that the ground was better than we first thought.” “But the fact that the access chamber had already been installed made the job very challenging, so we had to find a bespoke solution which was not only safe but also provided adequate room for the installation of the pipework. Also, we needed to ensure that the integrity of the concrete chamber was not compromised due to the loads coming on to the tank from the props. Although the ground conditions were good, there were earth embankments behind the sheet piles and the sides were not self-supporting.” The design utilised Groundforce Shorco’s modular propping system. Two levels of hydraulically-adjustable Mega Brace beams were ranged along all sides of the sheet-piled excavation and the corresponding sides of the concrete chamber. These were supported by a combination of MP50, MP60 and MP150 props to brace the sides of the excavation. Mega fixed extensions were installed against the concrete chamber to uniformly spread the load on the concrete chamber rather than fixing the props directly on to the chamber. This would have subjected the chamber to high concentrated or point loads. To provide as much working room as possible, Groundforce decided to use a single prop on the eastern side, resulting in 6.7m long unsupported span. Here, Groundforce Shorco used one of its 150 tonne-capacity MP150 hydraulic props to brace the lower level of Mega Brace beams. The top of the excavation was braced with one MP50 prop – a 50 tonne-capacity unit. The rest of the excavation was braced with 10 MP60 props – three pairs along the north side and the other two pairs to the western side. Groundforce Shorco used KD6 overlapping steel sheets to line most of the excavation but those along the western side were interlocking GFI sheet piles. The western side of the excavation was open-ended and too narrow to close the end. Therefore, there was risk of lateral movement of the Mega Beam on the western side. Hence why it required interlocking sheet piles and to weld the beam to the piles. Because they are interlocking, the GFI sheets

In a bid to enhance the practical knowledge and on-site safety of those involved in temporary works, PERI regularly delivers product awareness training workshops. Last week, the formwork and scaffolding specialist held its first training workshop for temporary works engineers, site managers and designers at Laing O’Rourke. The hands-on training took place at PERI’s training facility and exhibition hall in Brentwood, building on a series of similar successful events previously held for other sub-contractors in the industry. Hands-On Training Focus The one-day workshop, delivered by PERI’s Field Services Manager and experienced scaffolding instructors, covered a wide range of practical and theoretical topics designed to improve the group’s understanding of equipment safety and proficiency when designing solutions and carrying out temporary works checks on site. Key training activities included: The workshop was attended by engineers and temporary works designers at various stages in their career, highlighting the importance of continual professional development at both graduate and more experienced levels in the construction industry. The training was particularly valuable for those involved in checking temporary works systems on-site prior to concrete pours, ensuring that any potential damages or deviations from the drawings could be identified and corrected. Anu Adeyemi, Graduate Engineer at Laing O’Rourke said, “My role involves carrying out temporary works checks, so workshops like this help to simplify the terms and system components you come across on site. Everything is broken down so it’s easier to understand.”   Terry Hall, Field Services Manager at PERI UK emphasised the importance of hands-on experience in an industry where many engineers may only have classroom-based training or experience with 3D drawings. “It’s critical for people to see and handle the actual materials and equipment they will come across on projects. A lot of people may not have this practical knowledge, yet they are tasked with reviewing drawings. For many, this is the first practical training programme that has helped to bridge that gap,” Terry explained. He added, “By seeing the issues on-site, such as deviations from drawings or improper practices, attendees gain a better understanding of how to refer back to the drawings for best practices. This is key to maintaining safety and quality.” Building, Design & Construction Magazine | The Choice of Industry Professionals

Above and below ground temporary works specialist, Altrad RMD Kwikform, has launched a ground breaking new solution to reduce the effects of thermal loading – the Tubeshor Active Thermal Compensator (ATC). The Tubeshor hybrid hydraulic shoring system is used for propping waler beams or capping beams of large excavations. It comes in a range of diameters to cater for all duties of shoring requirement. An evolution of Tubeshor, the ATC is a revolutionary patent protected Tubeshor accessory that can reduce thermal loading by up to 90% compared to a mechanically locked off prop. Prop installation and pre-loading on site is carried out in the same way as for any standard proprietary prop, so no special operative skills are needed. What’s more, as Tubeshor ATC Units are assembled directly into the prop makeup, standard prop end-fittings such as Swivel Units and Spherical Bearers can be used, and props can be installed into the excavation in the usual manner. The Tubeshor ATC contains a 450 tonne hydraulic cylinder coupled to a bladder accumulator which is pressurised to suit the individual prop design geo-load before dispatch. Most of the time, the pressure in the accumulator exceeds that in the hydraulic system and normal prop stiffness results. When higher temperature forces excessive prop thermal expansion, the compressed nitrogen in the accumulator comes into play and results in a phase of reduced prop stiffness. This means that a further increase in prop length resulting from thermal expansion does not result in the usual increase in prop load. Ian Fryer, Global Product Innovation Director at Altrad RMD Kwikform, explains: “Once the props have been installed, their confined nature means that temperature changes bring about changes in the axial prop load with axial loads increasing as temperatures rise and decreasing as they fall. “Historically design for thermal loading has not been such an issue in the UK due to the relatively even climate. However, Consulting Engineers are now interpreting industry standards differently, meaning an increased contribution from solar gain also has to be taken into account, which, when combined with seasonal and daily variations can produce a design thermal range in excess of 35 ̊C. “Using this temperature range, thermal loading can account for 50% of the axial load capacity of the props, so half of the steel in the excavation is there purely to take account of thermal loading. The resulting need for larger or more props can sap scheme efficiency, push up the equipment cost, and take up valuable excavation space. “What’s more, installation may require heavier plant and more labour to assemble the equipment, incur greater costs for transportation and result in a larger carbon footprint. Our revolutionary new Tubeshor Active Thermal Compensator helps to mitigate these factors, reducing thermal loading by up to 90% compared to a mechanically locked off prop, while offering a raft of additional benefits.” Key features and benefits To find out more about the Tubeshor Active Thermal Compensator, go to https://www.rmdkwikform.com/gb/products/tubeshoratc/ or email info@rmdkwikform.com. For more on Altrad RMD Kwikform, please visit www.rmdkwikform.com Building, Design & Construction Magazine | The Choice of Industry Professionals