Including the tallest tower building in West Africa, this ambitious new project in Ghana’s booming capital city Accra saw our collaboration with architects AHMM for Ghanaian developer TDCC. Predominantly residential with associated domestic amenities and a small commercial unit, the development comprises four brightly-coloured buildings of varying heights.
The site is the second in a series of phased developments on the Villaggio complex, with the first phase already complete and consisting of low rise residential units. Its high-quality apartments, with impressive penthouse duplex units and in-house facilities such as rooftop swimming pools, concierge and gym, are set to appeal to the growing middle class of businessmen and returning ex-pats in Ghana’s thriving economy.
The kind of rocky ground found beneath the site is prone to storing large amounts of groundwater, so waterproofing was considered in the foundation and basement designs. Blocks A and B had a two-storey basement below, whilst Blocks C and D’s basements were one storey deep. We recommended an in-situ solution to simplify construction, extending all basements to cover the building footprints in their entirety and setting the foundations at a common level. Having analysed the loads (including dead loads of the building, those potentially imposed by internal uses, and the imposed loads of seismic activity and wind, particularly in the taller buildings) we also assessed the capacity of the soil via non-linear analysis.
In terms of superstructure we opted for a concrete frame design, which provided the flexibility to deal with a variety of building types and heights, as well as a range of internal layouts. We reduced the programme considerably through specifying a hybrid structure which incorporated precast concrete planks topped with in-situ concrete. Due to the potential for seismic activity, we also proposed in-situ columns and beams, since strong connections between components were crucial to providing the uniform strength required.
Four striking residential towers in Ghana’s capital, ranging in height and colour
Trasacco Estates Development Co.
Allford Hall Monaghan Morris
£ 80 million
2011 – 2014 (phased)
- 2012 BCI Award - Shortlisted