Hydrock provided the civil and structural engineering design for the prestigious Number One Bristol project which comprises the redevelopment of two adjoining eight and 15-storey towers in Bristol’s city centre.
The former 1970s office blocks have been converted into residential apartments with commercial space at the ground and first floor levels. The new accommodation is accompanied by on-site parking, a residents’ gym and arguably the most impressive feature, a 6,100 sq.ft residents club lounge and sky meadow (rooftop garden).
The 15-storey west wing includes 86 residential units ranging from studios to three-bedroom duplex penthouses. The eight-storey east wing contains 62 spacious studio, one and two bedroom apartments with the sky meadow located on the eighth floor.
To support the additional loads on the roof from the residents’ club lounge and sky meadow, we designed a steel frame with cold formed purlins instead of cut timbers. This reduced the number of trades required and accelerated the construction programme.
To infill the double height under croft space in the east wing we designed a composite deck to complete the level one floor plan. This is supported on a new steel frame consisting of columns down to the existing foundations and fixings back to existing RC columns.
Similarly, at level 14 in the west wing, the (now redundant) double height plant room received a new steel mezzanine floor with timber joist, creating six, three-bedroom duplex penthouse apartments with double height living rooms.
We produced the initial design for tender, and then worked closely with Bray & Slaughter, O’Leary Goss Architects and Taunton Fabrications to develop a final design which could be constructed in two phases and weather proofed in both the permanent and intermediate stages.
The development was completed in summer 2017 and our work enabled the project to progress through the design stages through the swift and effective resolution of challenges as they appeared.
The end result is a great addition of contemporary apartments to suit the ever increasing housing demand of Bristol city centre.