ENGINEERING
Navisworks utilised for clash detection. This was a vital step in designing the building services for the project around the restrictions of a limited existing ceiling void. The new pharmacy aseptic suite is heavily serviced, and the 500 mm void had to accommodate both the new services, and a number of existing service routes that needed to remain in place. Lumion software was also used to transfer the model into rendered images to give the client a realistic view of what the facility would look like. Virtual reality ‘walk-throughs’ then allowed the client to experience the facility, and gain a sense of how the space will be laid out. This formed part of a collaborative design development process, with regular reviews to tweak the detail of the design in line with client preference, the URS, and compliance requirements. Once again, the use of technology as part of detailed design is valuable in supporting a smooth validation process.
The new pharmacy
Construction of the Phase 1 project began with demolition of internal walls, opening up the space and allowing in natural light throughout the facilities, with views to both the north and south of the building thanks to vision panels in the internal walls. This will be transformational for pharmacy staff, as some areas of the old pharmacy have no aspect to the outdoors. The internal layout has then been reconfigured to provide the accommodation required. On entering the suite from the stair or lift lobby, there is a primary change area and locker room. From here staff will enter the facilities via the perimeter corridor on the south side of the building, which leads to the outer support room at the far side of the facilities. This is an unclassified office area.
A full-height glazed panel takes advantage of natural light from the external glazing.
From here, pharmacy staff will enter the Grade D inner support room, a laboratory area that provides the central hub of the new pharmacy, via a grade D first stage change area. They can then access two Grade C isolator rooms, via a Grade C second stage change area. To maintain compliance with the required cleanroom grades, the accommodation has been designed with a pressure cascade of highest pressure in the isolator rooms, lower pressure in the secondary change area, and lowest pressure in the inner support room. The multidisciplinary approach provided by BES was central to delivering this effectively, because engineered air flows can only be achieved if the architectural design is aligned to the required air leakage paths. Construction of the facility must be meticulous to
ensure that air gaps are controlled in the built asset, so close collaboration between BES’ design and construction teams was vital.
The aseptic suite
The Phase 2 project has been fully designed, and will begin construction when completion of the validation process for the new pharmacy allows the pharmacy team to move across to the new accommodation. Once again, the existing accommodation will be remodelled to enable a completely new layout that enables effective segregation of the Grade C change and isolator rooms, and allows air pressure regimes to be maintained.
Access to the aseptic suite will be by one of two routes: through the new pharmacy outer support room, or via the perimeter corridor that runs along the south side of the new pharmacy. A corridor will run through the centre of the suite, with access to the CT preparation facilities on the north side of the building, and to the ATMP preparation area on the south side. Storerooms and toilet facilities will be located at the interface between the new Chemotherapy aseptic suite and the CT/ATMP aseptic suite. A clog wash designed specifically for the facilities and the pharmacy team’s gowning protocols will also be located in this area, as a change of footwear will be required each time a member of staff moves between a Grade D and Grade C area. Due to the number of clog changes and variation in foot size, the BES team designed a bespoke clog storage system, along with clog washing facilities.
The new Outer Support Area was created to offer space for users, with a splash of colour for user comfort. This is a CNC grade area, finished to a high standard with vinyl floors, metal pan ceilings, and a hygienic paint finish. Vision panels and pass- through hatches allow full vision through the facility.
24 Health Estate Journal July 2021
Interconnecting airlock doors The entrance to the ATMP facilities will be at the far end of the central corridor.
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