Challenges
The project posed unique challenges requiring innovative solutions and meticulous planning. Located in a high-footfall city centre pedestrian zone, a critical aspect of the project was the complex demolition of three existing buildings, the former Maltas, Woolworths and Marks & Spencer retail outlets on Darley Street. Demolition works had to be managed whilst simultaneously installing temporary works for the new market development.
The works also include the removal of a second floor level link bridge from the rear of the former M&S building and another building on the opposite side of Piccadilly Street. All works were delivered directly adjacent to neighbouring, occupied properties, adding an extra layer of complexity to logistical planning.
Complex roof structure
In addition to the site location and associated logistics, the nature and condition of the existing building presented key challenges during the construction phase. The roof structure was a critical element of the project, requiring meticulous design co-ordination. Prefabricated rafters had to be precisely aligned with the existing roof framework with the installation of the ply deck requiring careful co-ordination to ensure fixings accurately hit the rafters. Integration of solar panels involved penetration of the insulation layer and single membrane without compromising the roof's integrity.
The quality of the installation of the mechanical and electrical (M&E) systems was paramount, as services were designed to be for visible on all floors. This demanded careful co-ordination.
Solutions
Options for reuse of the former department store buildings were explored at length with BMDC and design team prior to final design, with the new market utilising the existing basement/sub-basement structures, making use of this vital space on what is a hugely restricted site footprint. The development consolidated the functions of the market, freeing up Vintry House, the old storage building of M&S, to serve community and arts use, further diversifying the offer in an area that was otherwise in decline. The scheme integrates heritage elements from the Victorian Kirkgate Markets, linking the contemporary market back to Bradford’s history. Two sets of cast iron gates were restored and installed in the public realm/first floor, allowing public access to otherwise lost assets.
Detailed phasing plan
To prevent damaging the neighbouring wall to the North of the site, existing concrete-encased steel columns and beams were left in-situ and surveyed to identify where a series of strategically positioned steel waling beams could be placed, for the frame of the new market building to be joined. This had to account for not only existing structure but temporary support towers too.
The project followed a detailed phasing plan ensuring each stage was completed in the correct sequence and there were smooth transitions between different phases of the work. This plan included the installation of four escalators within the atrium area, which required precise co-ordination with the other construction activities.
Sustainability
The roof has 190 photovoltaic panels that generate electricity for the entire development. High-efficiency air source heat pumps serve the hot water systems, and the internal lighting system uses low-energy LED fittings. Actuated roof lights and wall-mounted louvres provide natural light and facilitate ventilation, reducing the need for supplementary heating or cooling. Mechanical ventilation incorporates heat recovery systems to maximise energy efficiency.
An automatic rainwater harvesting system feeds the outdoor planting areas and also facilitates toilet flushing. Real-time weather data supports this system, ensuring optimal storage levels and minimising wastewater discharge. 9000 litre capacity, flood-prevention holding tanks, capture rainwater and control flow into the main sewer.
Advanced technology
The market integrates high-tech features, with a digital energy management system and smart heating system to reduce energy consumption. An extensive network of smart meters track energy use to optimise building operational efficiency.
A computerised building energy management system monitors, analyses and controls the market’s internal environment and energy systems via a network of smart meters.
Ten roof lights with automatically operated ventilation louvres, provide natural lighting, helping to manage the accumulation of heat during the day, with a heat recovery ventilation plant supplementing natural ventilation and regulating the environment. Rest rooms are heated by highly efficient air-sourced heat pumps, integrated with solar thermal panels, designed to boost water temperature.
Outcomes
The highly sustainable new development not only minimises the environmental impact of the market’s operations, but also presents potential financial reductions for its occupants, supporting the council's long-term regenerative plans for the area.
Despite logistical challenges the project achieved a 10/10 client satisfaction rating for Health & Safety and 45/45 from Considerate Constructors as well as a Bronze CCS award in April 2024.
Social value was a key driver for the project team from the outset, with a focus on local procurement and retaining the Council’s investment within local communities. Kier delivered a significant social value programme resulting in over £10m of the project value being procured through local businesses and suppliers.
