"drainage"
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ACO MonoDrain drives high quality drainage solution for regeneration project
ACO Technologies plc
In 2018, Corby town centre was in need of renovation. With more council
planners calling for sustainable, urban developments, it became clear that the
town’s Market Walk Shopping Centre needed to be updated, both functionally and aesthetically. Midlands-based O’Brien Contractors were tasked with transforming Market Walk’s outdated multi-story carpark on Market Walk into a flexible, functional and long-lasting alternative.
2250ml of slot drainage on the new Gran Vía Street in Madrid (Spain)
ULMA Architectural Solutions
We have installed MultiV+ channels with our single-slot grating on the new semi-pedestrianized Gran Vía in the Spanish capital.
ULMA drainage solutions at Iguatemi Shopping Centre in São Paulo, Brazil
ULMA Architectural Solutions
KOMPAQDRAIN Traffic and MultiV200 compact channels have been installed at different heights.
ACO’s surface to outlet drainage solution delivers cost savings at new teaching facility.
ACO Technologies plc
The new Abraham Darby Academy was developed as part of Telford’s Building Schools for the Future scheme. It is a state-of-the-art teaching facility, designed for the 21st century, for pupils aged from 4 to 18, with a new primary school and leisure facility on the site. The Academy provides teaching space for 1,100 students, plus a sixth form facility, and the primary school can accommodate 400 pupils. The leisure centre includes a swimming pool, a four-court sports hall, fitness suite and changing facilities.
BLÜCHER® HygienicPro Keeps Ängöl's Brews Clean
BLÜCHER UK Ltd
Supply a drainage solution that could meet the demand of a 1500 m2 brewery.What Client Needed - High quality drainage for efficient flow and a high-capacity filter basket that can collect malts and hops
Green Roof, Intensive, Raithwaite Hall, Whitby, UK
ABG
Raithwaite Hall is a 5 star, 45 bed boutique hotel set in 85 acres of wooded valleys within the North Yorkshire Moors National Park. The hotel offers terraced views of the landscape and across the Whitby coastline. A new extension was designed that is built against the hillside with stepped landscaped areas around the new building and an intensive green roof terrace to help blend the structure in with the surrounding gardens.The intensive green roof terrace is installed directly above a new function and dining room and required a specialised design to accommodate the additional loading and provide the necessary drainage for the turf lawn. By utilising a multi-purpose geocomposite roof drainage board, the green roof system could be achieved to meet the project specific requirements. The ABG Deckdrain 2540S-NW20XUV product offers a lightweight option that delivers the equivalent drainage capacity of 300mm of drainage stone in a 25mm layer that weighs over a 100 times less per square metre. The lightweight drainage layer is supplied in rolls and is fast to install and move into position. The Deckdrain layer includes an integrated filter geotextile bonded to the top of the cuspated core. This prevents the growing media layer from intruding into the drainage void and filters the soil to prevent clogging. The Deckdrain is made from a high strength HDPE core that supports the 200mm deep layer of growing media required for the intensive green roof installation with deeper root systems. The underside of the product is impermeable and provides additional protection to the liquid waterproofing membrane. A green roof surface finish further helps to prolong the lifespan of the waterproofing layer and prevent UV degradation. The large grassed area on the podium also reduces surface water run-off and the grass is protected against waterlogging via the efficient drainage board layer. The shallow drainage build-up required also reduces the height of the steps onto the terrace and the associated cost of stone flags. The completed installation encompasses a 20mm Roofdrain drainage & reservoir board to support a secondary smaller sedum roof area, as well as Deckdrain layers installed for structural drainage to the surfaces around the patio slab and retaining wall areas.ABG provided a full green roof project design, installation and maintenance service for the project.
ULMA channels at the Haslemere Station, South England.
ULMA Architectural Solutions
Making use of ULMA’s MULTIV+100 polymer concrete channel drainage, topped with a MULTIV+ Heelguard Grating, the site has the capacity to retain access and passenger safety year round, simplifying the drainage system, and making commuter life easier.
Kingston Gas Works, Berkeley Group
Wedi Systems (UK) Ltd
A recent project of the Berkeley Group, the Kingston Gas Works with 240 apartments called for a special solution due to the maximum construction height available for the shower being only 100mm including tray and drainage. All showers were constructed with XPS integrated shower elements (wedi Fundo Integro), which are only 90mm thick including the integrated DN50 drainage. Despite the low construction height, the specified solution offers no compromise on the flow rate of the drainage. Complete waterproof bathrooms - walk-in shower with a niche, building boards on walls & floors with sound insulation. Products:wedi Fundo Integro shower element with integrated drainage (1800x900x90mm) wedi building boards 10mm & 12.5mm - for walls and floorswedi prefabricated niche wall element wedi Non-step sound insulation composite panel (reduction by 16db)
Hilton Hotel, Minories London - Harmer SML Below Ground
Alumasc Water Management Solutions
Harmer Building Drainage, part of Alumasc Water Management Systems (AWMS), has recently supplied its leading SML below ground drainage system to a major London development. The project, sited at The Minories, Aldgate, sees the introduction of the first Canopy by Hilton hotel in the UK which is scheduled to open in 2018. Working with contractors PCW Drainage Ltd and A J Morrisroe, Harmer supplied below ground drainage for the hotel’s new double storey basement box.The Minories Hilton hotel is a prestigious development, close to London’s historic Roman and medieval city walls and a short walk from the East End. Wayne Wilmot, National Sales Manager for Harmer Drainage comments: “It’s an unusual site. The contractor, A J Morrisroe, constructed a double storey basement box and podium slab to support a 16 storey residential block and a 14 storey hotel extension. It covers a footprint of around 3,500 metres across a narrow site. There were multiple levels of earlier construction to work through, including foundations and piles that date back to the 19th century. And because it’s close to the East End, The Museum of London and 1st Line Defence got involved to establish if there were any WW2 unexploded bombs buried on the site! Definitely not a run-of-the-mill project!
How to prevent flooding. Northampton Service Station and Lorry Park, UK.
ULMA Architectural Solutions
We have improved the drainage system at this lorry park and service station in this town to the north of London. The problem was that the drainage system installed in the area did not have sufficient capacity to drain the rainwater, leading to dangerous accumulations of water on the road surface.Service stations and lorry parks have a constant flow of vehicles. There are also some areas where HGVs turn, making it necessary to guarantee the safety of the installation of the channels in order to prevent breakages and accidents.Good advice on your drainage system avoids problems and gives you peace of mind.In these cases, it is essential to have a consultancy service that, taking into account all the necessary parameters (location, rainfall, surface slope, weight to be borne by the grating (load type) and length of the drainage line), defines the model best suited to the site.In this project, 250 ml of Civil-F polymer concrete channels, model F150K, were installed for load type F900. And it has a grating secured at 8 points. It is important for you to know this.
Podium Landscaping, Roofdrain & Advanced Turf System, Edinburgh Quartermile, UK
ABG
The Quartermile development is a cosmopolitan mix of luxury apartments, cafes and businesses in the heart of Edinburgh city centre. The masterplan for the new area is designed by Foster + Partners and enjoys views of some of Edinburgh’s greatest landmarks. The access to the new building (adjacent to the old Edinburgh Royal Infirmary site) is elevated from the North Meadow Walk pedestrian walkway and cycle route. The pathways and landscaped areas in front of the development needed a structural drainage solution and reinforced turf area that would be suitable for trafficking by maintenance and emergency vehicles when required.ABG’s high strength Roofdrain 60S+RX geocomposite was specified to provide sub-surface drainage across the base of the podium deck. The drainage board provides a high flow capacity void to channel water pressure to the surrounding perimeter drains. By utilising a 60mm drainage layer the need for much deeper and harder to install drainage stone layers can be minimised. The carbon footprint for the product is just 3.3 kgCO2e per m2 which is an approximate 50% saving compared to the embodied carbon of quarrying, transportation and installation of the equivalent thickness of drainage aggregates. Once installed the Roofdrain core is filled with pea gravel to provide a rigid sub-base beneath a bedding layer and resin bound gravel pathways. The drainage core features regular perforations to allow surface water to percolate and drain to the underside of the board. Adjoining rolls can be easily overlapped with the cups designed to slot into one another. The Roofdrain was overlaid with a Terrex NW9 geotextile to prevent fines entering the drainage core. The Roofdrain can be stepped to cascade into lower sections to suit the landscaping layout. The main green area to the front of the building was cultivated using the Advanced Turf reinforced grass system. The Netlon Advanced Turf System (Netlon ATS) is a high performance, mesh-element reinforced natural grass rootzone system that provides a SuDS compliant free-draining grassed surface. It consists of a high quality, sandy soil rootzone into which thousands of playing card sized polypropylene Netlon plastic mesh elements are pre-blended. The composite mesh reinforced rootzone and selected turf are then delivered to site as a system. ATS was specified for this development to support loading by occasional MEWP vehicles such as cherry pickers, and in the event emergency vehicles need to traffic onto the grass.
Gold Star of Silver How
ACO Technologies plc
Developing a house worthy of the prestigious RIBA House of the Year shortlist is no mean feat. It requires every intricate detail to be well thought through, from the choice of tile to the drainage infrastructure. When a team of award-winning architects required a discrete drainage solution that would support the bold, seamless transition from the inside of a home to the outside, it turned to ACO Water Management for support.
22 Bishopsgate, London - 60+ storeys of EuroPipe
BLÜCHER UK Ltd
The second tallest building in the United Kingdom, and tenth largest building in the world is home to an impressive amount of BLÜCHER EuroPipe! All 62 floors are equipped with stainless steel drainage, from RWP, SVP and food vacuum systems to interceptor foul drainage and disconnecting traps for rainwater.The project spanned over two years, and it was a no brainer that our lightweight, adaptable and push fit system was chosen as the sole supplier.
Remedial Basement Waterproofing
Delta Membrane Systems Ltd
When it comes to residential, commercial or any structure below ground, waterproofing is a critical component within the construction process for protecting and preserving a building. A poorly designed or installed waterproofing solution can fail leading to significant implications on the structure itself.Delta Registered Installers, Abtech (UK) Ltd were called upon to give assistance on a particularly technically complicated project where approaches to waterproofing design and installation had been incorporated, however the system had failed. For a great remedial waterproofing outcome, seek assistance from an experienced waterproofing company to inspect your site and carry out the remedial work.The property when built had a Type C, cavity drain membrane systems incorporated (not a Delta System), however there was no basement drainage incorporated into the design to manage water ingress.In principle a Type C, drainage system is a water management system. The Type C system is used to control water ingress once it has penetrated the structure. Moisture or running water travel behind the Type C membrane within a controlled drainage system. A Type C System isn’t classified as a barrier but provides protection by means of water management. For a Type System to be successful a suitable drainage system is required to collect and discharge water ingress to a suitable and safe evacuation point (either by natural forces or a mechanical pump system).When correctly installed, groundwater drainage channels effectively relieve hydrostatic water pressure in the below ground structure. They are installed below flooring membranes at the floor/wall junction.
AluOne - Herbert Road (video)
Balco Balcony Systems Ltd
AluOne is a self-supporting, lightweight and recyclable open balcony system. Designed for structural simplicity and ease of installation, whilst stylishly complimenting the building facade.Manufactured at our state-of-the-art production facility, and constructed using a four column self-supporting lightweight system, AluOne ensures ease of implementation on site.Suitable for new builds, renovations and retro-fitting to existing buildings. We have a suitable solution for every building. Guaranteed durability, practicality and a high quality finish, AluOne is a truly bespoke modular system.Available in a wide-range of RAL colours, AluOne can be customised specifically for each project with a choice of balustrade and floor tile options.AluOne comes with a tiled floor of concrete paving slabs. The plates have been carefully sandblasted to allow the natural stone ballast in the plate to appear. Thanks to our manufacturing method, this plate has an unique colour resistance. The paving slabs are 400 x 400 in size and available in three colour shades.Always designed with drainage management in mind, AluOne has a hidden system in the balcony for optional rainwater drainage. The water flows discreetly under the paving slabs, allowing it to move into the drainage pipe via a gutter in the balcony frame. This is connected to the building's drainage system or to a drainage pipe that ensures the balcony rainwater discharge is properly managed.AluOne is available ins 12 different sizes. You can choose between four different widths and three depths, each in convenient increments of 400mm.
AluOne - Herbert Road
Balco Balcony Systems Ltd
AluOne is a self-supporting, lightweight and recyclable open balcony system. Designed for structural simplicity and ease of installation, whilst stylishly complimenting the building facade. Manufactured at our state-of-the-art production facility, and constructed using a four column self-supporting lightweight system, AluOne ensures ease of implementation on site. Suitable for new builds, renovations and retro-fitting to existing buildings. We have a suitable solution for every building. Guaranteed durability, practicality and a high quality finish, AluOne is a truly bespoke modular system.Available in a wide-range of RAL colours, AluOne can be customised specifically for each project with a choice of balustrade and floor tile options. AluOne comes with a tiled floor of concrete paving slabs. The plates have been carefully sandblasted to allow the natural stone ballast in the plate to appear. Thanks to our manufacturing method, this plate has an unique colour resistance. The paving slabs are 400 x 400 in size and available in three colour shades. Always designed with drainage management in mind, AluOne has a hidden system in the balcony for optional rainwater drainage. The water flows discreetly under the paving slabs, allowing it to move into the drainage pipe via a gutter in the balcony frame. This is connected to the building's drainage system or to a drainage pipe that ensures the balcony rainwater discharge is properly managed. AluOne is available ins 12 different sizes. You can choose between four different widths and three depths, each in convenient increments of 400mm.
The Maurice Wilkes Building
Kingspan Insulation
Tapered roof insulation offers drainage and fabric performance on roof of Grade ‘A’ Office development
ACO helps redevelopment of King’s Cross get on track
ACO Technologies plc
ACO’s drainage systems provides efficient surface water management to many of the redeveloped public areas
Aspen Stainless for fresh food manufacturer
ASPEN by Canal Engineering Limited
Aspen Stainless has a continued and successful relationship with the UK’s leading supplier of fresh produce.
Aspen worked closely with the contractor for the design, supply and fit of an effective drainage system for their new production facility in central Scotland. The bespoke system was designed to boost the hygienic performance of the entire factory and to prevent the cross contamination of products. Careful attention was paid to the infrastructure of this facility and drainage of the waste.
The spirit of innovation and passion for quality blended perfectly with Aspen’s modern manufacturing techniques and commitment to technical excellence.
ACO helps Itzhoe catch its cultural identity
ACO Technologies plc
ACO Freestyle bespoke gratings help deliver an aesthetic surface water drainage solution for a town centre upgrade
HPS geotextile protection in Landfill
Geofabrics Ltd
Geofabrics HPS17 is installed as the protection geotextile at Erin Landfill Site, a former colliery near Chesterfield.
The geotextile formed part of a large cell
measuring approximately 40,000m².
The site also involved installation of 1000m of deep water drainage, 118,000m² of impermeable membrane, 1000m of fully-welded leachate pipework and 14,000 tonnes of drainage stone.
Geofabrics HPS17 is a thick needle punched non-woven geotextile manufactured from 100% virgin polypropylene high tenacity
fibres containing 1% active carbon black.
Permeable paving provides the SuDS compliant solution to the car park of a distribution centre in Yorkshire
Brett Landscaping
As part of their flood prevention strategy Bassetlaw District Council required the distribution centre to be fully SuDS compliant .
Logistics and warehousing company DB Symmetry requested that the hard-landscaping for their car park must be a permeable solution, so a sustainable drainage system (SuDS) was designed.
Permeable paving was chosen as a key part of the overall surface water drainage strategy as this achieved all of the requirements of the planning team, while maximising the use of the land available for the project for the client.
To view the whole case study please click the link below.
Alder Hey Children’s Health Park - Harmer Roof Outlets Harmer SML
Alumasc Water Management Solutions
Harmer Drainage high performance Roof Outlets and SML above ground drainage were recently specified for a new, forward thinking children’s hospital in Liverpool.The Alder Hey Children’s Health Park is a large £250m project developed to improve the paediatric medical facility and enhance the experience of both patients and staff. The aim is to set the hospital as a new benchmark for the delivery of paediatric care in the UK and around the world. It includes six wards, a large critical care unit, 16 theatres and a host of clinical services, together with shops and cafes.
Decking Pedestals & Green Roof System - Kensington
Wallbarn Ltd
A good example of the before and after effects of laying a sedum roof garden and accompanying deck and paved area onto a small domestic roof terrace.
All these products are designed to sit on top of the waterproof membrane (in this case single ply) there was no issue of damage to the roof.
The support pads lifted the decking off the roof, eliminating the risk of the timber piercing the membrane, and drainage was maintained through the roof surface since the green roof system has a cavity beneath its own reservoir and drainage layer to allow water run-off.
Euro Foods Group Headquarters
Kingspan Klargester
Bespoke Klargester grease separator installed at Euro Foods Group to help preserve their mains drainage and prevent any unwanted blockages.
Hygienic stainless steel
ASPEN by Canal Engineering Limited
In dairy industries it's vital that hygiene standards are kept to a high standard. Drainage and kerbing are important products that need consideration. To reduce costs, many may opt for concrete, however over time concrete dries out and is prone to cracking. This can jeopardise a hygienic environment as unwanted bacteria will harbour in the cracks Alternatively, drainage and wall kerbing. Stainless steel is resistant to caustic cleaning materials and lactic acid, which are common elements in a dairy. This resistance ensures that the ss surface does not corrode or weaken making it an excellent long term solution.
Rushden Lakes Shopping Centre - Alumasc Gatic CastSlot
Alumasc Water Management Solutions
CastSlot and Paveslot, the leading channel drainage systems from Gatic Civil Drainage, have been installed at Rushden Lakes, the new high end shopping centre in Northamptonshire. Specified by consulting engineers, BE Design, and working with contractors Winvic, CastSlot with a tread safe top was carefully selected for its robust composition – essential for a busy shopping centre. CastSlot’s tread safe top is important in areas with high volumes of pedestrians, removing the risk of heels getting caught in the grating. PaveSlot was installed in the project’s central boulevard – home to a bespoke water feature.Gatic is a globally recognised brand, specified for many prestigious projects around the world. Its leading range of surface water drainage is strong, durable and reliable, with load ratings from A15 to F900 to suit a wide range of applications. CastSlot’s high capacity channels provide effective surface water management, protecting areas from excessive rainfall. PaveSlot is ideal for paved areas, with a discreet profile that sits neatly in the ground for a subtle and unobtrusive finish.
Premier Inn, Birmingham
Geberit Sales Ltd
Geberit’s Sovent fitting, used for the first time on an English building. A revolutionary system, the Geberit Sovent negates the need for two stack drainage, streamlining systems for tall-buildings of this nature.
In addition to Sovent, Geberit Silent-db20, a waste water pipe with built in sound insulation, was installed to ensure peace and quiet for the hotel’s guests, Geberit Mapress press-fit pipe system provides general plumbing and Geberit HDPE; a long-lasting pipe with low environmental impact; delivers above-ground drainage. Plumbing systems were specified and installed by Sharpe Mechanical Services.
Lite Decking Board Install at Fulham Reach, London
AliDeck
AliDeck were fortunate to collaborate with Barretts of Aspley at the prestigious Fulham Reach development in London. Central to this project were key AliDeck products across the balconies: the AliDeck Lite Board, Low Joist, and Balcony Drainage System. These components underscore our commitment to supporting fire safety and effective drainage across multi-storey, multi-occupancy buildings with balconies, terraces, or walkways.This new-build development, located on the banks of the river Thames in a key conservation area, required safe, compliant, and aesthetically pleasing solutions to meet the standards of Berkeley Group, who specialise in brownfield regeneration and building quality homes.
Porous asphalt surfacing for car dealership
Tarmac
This large car dealership in Dorset required a new car park surface for the external paved areas. Planning requirements meant that a porous system was required to enable sustainable drainage and avoid large scale run-off into the surrounding catchment. Using Tarmac's ULTISuDS porous asphalt sustainable drainage systems met the needs of the local planners by managing surface water and reducing direct surface water run-off, but also met the client’s requirement for a safe, accessible all-weather surface for their customers. By eliminating surface water, it also eliminates the problem ice patches that can occur in cold weather conditions. It would also be durable enough to cope with daily vehicle movement and static loading from cars that were on display.
Tottenham Hotspur Stadium - Gatic SlotDrain, Harmer SML & Wade Floor Gullies
Alumasc Water Management Solutions
With the reputation of the illustrious Tottenham football club preceding it, the new Tottenham Hotspur Stadium is an emblematic building that has already secured its place as a sports stadium to be remembered.It has also become one of the more renowned and iconic spaces to have benefitted from Alumasc WMS expertise, receiving the full ‘rain to drain’ treatment.Comprising five core brands and more besides, Alumasc WMS was brought into the project to provide cohesive, integrated water management throughout the project. This eventually included the installation of Gatic Slotdrain systems, Gatic Access Covers and AssistLift Covers, Harmer SML below ground Cast Iron drainage and Wade floor gulliesto ensure effective water management all round.Completed in 2019, the 62,303-capacity stadium is one of the largest in the Premier League and the largest club stadium in London. The state-of-the-art sports and leisure centre can stage major events including football games, NFL American football games and rugby, as well as concerts and other non-sporting events.Populous Architectural Design were the architects on the project, however, it was Buro Happold Engineering that specified Gatic Drainage and Access Covers, Harmer below ground cast iron drainage and Wade floor gullies from Alumasc WMS for the task.
ABG blueroof - Rooftop Stormwater Attenuation, St James Quarter, Edinburgh, UK
ABG
St James Quarter is an impressive new galleria retail shopping centre and residential development that rejuvenates a large area of the New Town in Edinburgh city centre. The site was formerly occupied by a dated 1960s era shopping precinct, and with the exception of the John Lewis store, all of these old buildings have now been demolished to make way for the new development. The £1 bn project creates 850,000 sq. feet of new retail space, with a capacity for 80 units focussed on high-end retail alongside the Bonnie & Wild’s Scottish Marketplace and Food Hall.Such a large city centre development is subject to strict planning conditions for the management of surface water. The Water Environment Regulations3 (CAR regulations, Scotland) require all surface water from new developments to be attenuated and treated by a Sustainable Drainage System (SuDS) before it is discharged into the water network. The aim of SuDS is to mimic natural drainage, encourage infiltration and attenuate hydraulic impacts to minimise downstream flood risk. Excavating underground storm water storage tanks to control surface water run-off was not possible since three levels of basement parking are incorporated beneath the retail centre. Even where possible, basement tanks are comparatively expensive compared to roof level attenuation systems, with high spoil disposal costs, increased safety risks arising from the excavation activities and a large carbon footprint incurred as a result of the number of additional site vehicle movements.The proposals for drainage and SuDS at the St James Quarter development were mainly focussed on the large 15,000m2 catchment area on roof level 5, with 4,734m2 of 80mm deep attenuation void capacity installed by ABG’s installation division ABG Installs. The blueroof system treats and restricts storm water that deluges onto the roof before it is gradually released over a number of hours via outlet control and filtration chambers to the underground drainage system.The attenuation and restrictor chambers on level 5 (east and west of the soon to open central circular W hotel building) and onto balcony areas 1 and 2 at the front and back of the upper apartment buildings, are supplemented with an additional of 2,280m2 of ABG Roofdrain geocomposite, installed at the base of rooftop planters to provide a connected drainage and irrigation / reservoir layer as part of the landscaping design.ABG calculated and designed the required attenuation capacity, including a new diffuser chamber solution to control water outflow at downpipes.
ULMA’s Heavy duty polymer concrete channels chosen for CNG Fuels stations in Birmingham, Knowsley, Bellshill, Newark and Avonmouth stations.
ULMA Architectural Solutions
Service stations are notorious areas for high intensity traffic, where vehicles brake and accelerate, and where there is also a high concentration of hydrocarbons on the ground: petrol, diesel, lubricating oils.This is the main reason why CNG Fuels Ltd. has specified ULMA Civil F400K and F300K models in Fuel Stations across the country.CNG Fuels already supply 2,000 vehicles a day from its five public access refuelling stations, and a sixth station at Knowsley, near Liverpool, where ULMA drainage channels have being installed. This station, close to the M6 at Erdington, east of Birmingham, can refuel up to 500 HGVs a day.We have also supplied our F300 and F400 channels to Bellshill, Knowsley, Newark and Avonmouth stations.Civil F heavy duty drainage channels
External decking on roof terrace
New Era Floor Systems Ltd
New Era cradles were used to lay a level decking system on a roof terrace that had natural sloped drainage. We used UC4 treated external swedish softwood battens and composite decking to ensure long lasting and maintenance free-use.
Merry Hill Retail Complex Car Parks
Sika Limited
The Purple and Green MSCPs have capacity for more than 4,000 vehicles across five levels. The project’s scope involved concrete repair, structural strengthening using carbon fibre laminates, the replacement of the conduits, movement joints, drainage channels and deck waterproofing.
ABG blueroof, Podium Deck Stormwater Attenuation, Middlewood Locks, Salford, UK
ABG
Located at the first locks of the Manchester, Bolton & Bury Canal, the second phase of the £1bn Middlewood Locks development in Salford delivers 546 apartments across 4 new buildings with private podium gardens. Phase 2 of the development is part of the wider mixed-use scheme to regenerate 25 hectares of brownfield land with new apartments, office space, a hotel, bars, restaurants, car parking and a gym.The large catchment area of the development discharges to the newly renovated balancing basins that service the confluence of adjacent canals and the River Irwell. An extensive podium drainage landscaping design was required to meet the site’s strict discharge limits and reduce the impact of surface water run-off to less than that of the pre-developed brownfield land.The ABG blueroof storm water attenuation system specified for the scheme covers over 9,500 m2 and restricts rainfall outflows to below the 16 l/s discharge limit on Plot G of the site and within the 20 l/s limit for Plot H. The system incorporates 27 ABG restrictor chambers above rainwater outlets which are configured to restrict outflow rates to within the discharge consents.The system is designed to attenuate a 1-in-100 storm event (data extrapolated from the local FEH 2013 flood report), plus 30% allowance for the effects of climate change. The geocomposite drainage and attenuation layers and network of restrictor chambers serve to filter surface water run-off pollutants to treatment train stage one of the SuDS process, meaning no other filtration measures are required. The top of the chambers are designed to sit flush with the porous resin paving surface, and different configurations and thicknesses of drainage composites were used to achieve the correct height of system to match the different surface levels. The ABG Deckdrain geocomposite layer provides multi-directional flow capacity to efficiently channel rainwater to the nearest restrictor chamber outlet whilst the integral geotextile filter helps to prevent the cuspated drainage core from becoming blocked.The choice of hard and soft landscaping materials specified for the development are of a very high standard and the inclusion of large areas of green spaces and substantial planting creates valuable new private gardens and amenity spaces for the area.The attenuation system configuration was designed and supplied by ABG and installed over a 6 month period by ABG Installs. As part of the storm water attenuation system design, a new restrictor chamber diffuser was developed to fit directly onto the downpipes of the apartment buildings. The attenuation voids were modified to allow for cable ducting to pass through them and a method was also developed to provide structural drainage beneath the concrete footings of the stone planter walls.
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