Architect and Builder Magazine South Africa Dec 2017 / Jan 2018 - Page 70

commanded open with all other floors having them motorised closed to draw the air / smoke away from the atrium towards the back of the building. This fire signal also set the change over from normal AC to smoke extract mode and started the dedicated smoke extract fans. • Special calculations were undertaken to determine the structural stability of the “pods” that extended into the atrium and for the façade Veerendal structure to be of untreated steel. • Pumps with their specific fire water storage tanks were provided for each of the hydrant and sprinkler services. Each system was given one electric motor driven pump (on emergency power) and one diesel engine pump. These pumps and tanks were 70 No 1 Silo