Global suppliers of formwork solutions and services in all areas of construction, Doka was selected to provide its equipment and technical expertise for phase one of the Ebury Bridge ‘Renewal’ in Belgravia. The project involves the full redevelopment of the current estate and includes the building of 781 new homes, more than half of which will be designated affordable properties.
A new community hub, nursery and a fitness centre also form part of Ebury Bridge’s regeneration, along with four, high-quality public squares comprising water and play features. With a focus on sustainability, more than 2,000 resident cycle spaces will be installed throughout the development. In addition, 270 new trees will be planted, as well as new flowerbeds and plants to create natural havens for the community and increase biodiversity. The Ebury Bridge Estate is designed to be a near car-free development, with pedestrian and cycle transport being prioritised.
Doka was selected by construction engineering specialist, Keltbray – working on behalf of Bouygues – to design and supply the equipment required to form the concrete structures on the first phase of the redevelopment. This meant providing a hydraulic climbing system and formwork for the safe, time-efficient construction of two residential blocks (buildings 7 and 8). To simplify the supply chain and leverage the wide range of Doka products, Keltbray also specified equipment to construct the buildings’ floor decks. Prior to the equipment’s delivery and work starting in July 2022, Karol Mikowski, Sales Account Manager at Doka undertook a series of crucial project management meetings intended to specifically understand the project priorities, requirements, and constraints ensuring the design solutions proposed would be in line with the project expectations.
High-performance equipment for a high-profile project
Doka supplied its automatic climbing formwork SKE50 plus and its heavier-duty, SKE100 plus system, for the cores of the two buildings. The latter unit allowed operatives safe integrated hanging access to the working levels from floors below.
As in many urban environments, due to limited site space on construction sites, Doka was able to support the build process by supplying some of the equipment and platforms as pre-built units, assembled by the Doka team in advance of delivery in its own facilities. This allowed the site teams to focus on their core workflow processes, minimise storage and reduce start-up time on site.
Each residential block will comprise 16 floors, hence the formwork equipment required the capability to reposition several climbing units simultaneously in order to meet the client’s strict completion timeframe. The Doka SKE plus formwork systems were designed for such a task. The freely plannable parallel units can be adapted to varying layouts, returns, inclinations, shapes and structure heights; their crane-independent operation resulting in a safe, rapid workflow. Able to re-position several parallel climbing units quickly and at the same time using remote-control, the integrated platforms and access routes also provide complete safety during working operations.
For the buildings’ core walls, these were created using Framax Xlife, Doka’s rapid-forming systemised formwork solution, used in conjunction with the SKE plus hydraulic climbing units. The Framax Xlife’s fast, efficient function is partly due to its optimised panel sizes to achieve a consistent 15cm increment-grid – whether panels are stood upright or on their sides. Framax Xlife’s rapid working qualities are also a result of the few processes involved in its operation. Furthermore, its forming times are kept to a minimum by widely-spaced form-ties of up to 1.35m apart. With the Framax Xlife unit, accuracy is not compromised for speed, with all connectors and accessories fitting seamlessly.
In terms of the buildings’ decking, Doka’s steel-framed, high load-bearing Staxo 100 system proved ideal in allowing flooring slabs to be safely installed around the buildings edges and double floor height areas. With its integrated, slip-resistant rungs, the Staxo 100 unit is assured for safe up and down access. It ensures this adaptable unit, with its variable inter-frame spacing enabling continuous adaptation to layouts differing in height, unites high load capacity and safe operation in every situation.
The Staxo 100 units were used with H20 top P timber beams and plywood for the more complex zones alongside Dokadek 30, a beam-less, hand-set floor formwork system and Eurex props for the less-complex and larger span internal floor areas. The design allowed Keltbray to combine the advantages of a systemised panel formwork system with those of Dokaflex floor formwork, especially when used together to easily complete infill areas around columns. Dokadek 30’s 3m² primary panels guarantee rapid, effective slab formwork installation– across a range of flooring zones.
“The Doka climbing system has helped reduce the crane usage on site leading to improved floor cycle times” explained Trevor Healy Project Director for Keltbray. “As a team we had big challenges to overcome with placing the pre-cast balconies on the perimeter of the building before pouring the slabs. This has been overcome by some clever design from the Doka team and with the utilisation of the Doka Staxo system working beside the Dokadek panel system.”
Planned for completion in 2024, the Ebury Bridge redevelopment is destined to deliver the highest number of new affordable homes in Westminster in more than 50 years. The project’s concrete frame construction will conclude in May 2023, with Doka’s proven formwork, climbing and shoring systems proving essential to the safe, efficient and timely construction of the residential blocks’ structural concrete elements. Supported by Doka’s expert technical team available during the build and offering vital design, as well as operational guidance in relation to its equipment’s use, the client will be afforded complete peace of mind during the construction of their new residential blocks.