In the formation of undercrofts, and two storey buildings, concrete floor slabs in a multiple of sizes were used to form the floor. These have already been detailed in the Manual 'A Different Approach to Build Hospitals'. The introduction of "soft spots" or knock out points allowed for drainage and other services to gain access to the undercroft or ceiling void. Known as Baldwin slabs they were manufactured off site and were placed in position before the cladding was put in place.
To secure the cill brackets to the perimeter wall of the undercroft, metal slotted channels were first secured to timber bearers. The bearers were held in position within the formwork while the concrete was cast. After striking the formwork the bracket was aligned in the channel, the cill fixed and then the panels. The following photographs show this sequence.
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