Scudder Demolition led Phase 1 of this project, which entailed demolition, structural steel, civil engineering and building works packages on ‘Stage 6’. The end goal of our works was to break out internal walls and floors to create an open plan layout to the building, in addition to a large central opening that would accommodate a feature drum staircase. Phase 2 entailed internal demolition and soft stripping by our team, in addition to asbestos removal by Carey Group company, ION Environmental.
Our team faced major challenges during modification of the existing structure to adapt to the new layout, with Phase 1 being carried out using a top-down sequence. As part of the works, our team removed multiple structural concrete elements and blockwork, extensive structural steelwork, plant, toilet facilities, and numerous services throughout the building to create multiple open spaces within the structure. In addition to this, our team also created new structural openings to accommodate a new chiller system and to install new services.
Structural alterations and concrete breakout was undertaken on each floor to create the vertical profile to house the steel frame supporting the feature drum staircase. Our team also installed steel amphiteatre stairs, new emergency access stairs and a supporting steel frame leading from the second floor to the roof. Subsequently, we made modifications to strengthen the two lift shafts, including the installation of mini-piles, casting structural slabs and making alterations to the underground drainage on the lower floor level.
The alterations to the profile and layout of each slab required our team to make alterations to multiple supporting beams throughout the structure. Furthermore, we had to cast concrete landing platforms to hold the two-tonne load created during the installation of each section of the precast staircase. Our team worked to an exacting tolerance when fitting the supporting steel frame to the existing structure and the framework for installation of this staircase.
During Phase 2 works, our team undertook further demolition works, structural alterations and steelworks in addition to waterproofing works, re-screeding of each floor, the application of sealant paint, and the construction of plinths and blockwork. During these works, our team worked in close proximity to unmapped live services and pre-surveyed asbestos contaminations, which required careful planning and forethought to mitigate the potential health and safety risk to both our operatives and employees still working within the structure.
Throughout the project, the recycling of plaster, masonry and metals was being handled by Carey Group comapny, Seneca Resource Recovery, who ensured 100% diversion from landfill for waste material extracted from the site.