in basement -4 with the sprinkler protection and potable water plant located in basement -4 , beyond the extent of parking to the perimeter of the site .
Engineering The project started with bulk earthworks to create four parking basement levels below uMhlanga Rocks Drive . The large basement was formed with soldier piles around the perimeter of the building and 50,000m 3 of soil was carted off site . Skin friction augured piles were installed with an average length of 18m into the Berea Red supporting soils .
A fast track construction program was implemented to meet the stringent time lines .
The total building area is 38,000m 2 over the four basements parking levels and six office floors . An 8.4m by 8.4m column grid was used and the structure mainly comprised pile caps , reinforced concrete columns , shear walls and post-tension flat slabs . At peak production four slab decks were poured per week to maintain the tight construction program .
Sustainabilty The building is designed with energy efficiency in mind and contains appropriate responses to green issues as agreed to during the design process and has achieved a Green Star SA - Office v1 4 star rating .
298 FNB Acacia House