One of South Africa’s prestressed hollow-core concrete slab pioneers, Echo Prestress, was founded in 1995 when a factory was built in Kempton Park to manufacture prestressed hollow-core slabs.
South Africa’s Echo group has had considerable success in finding and developing new markets for hollow-core, especially in security and retaining wall applications. This article outlines an innovative form of retaining wall which was jointly developed by an Echo engineer in collaboration with an external engineering consultancy.
South Africa’s Echo group has had considerable success in finding and developing new markets for hollow-core, especially in security and retaining wall applications. As South Africa has one of the world’s highest crime levels, good security walling has become an unfortunate necessity.
Increasing numbers of South African architects and structural engineers, many of whom were slow to adopt hollow-core technology, are now using it as a means to safe-guard quality, accelerate construction time and save costs.
A retaining wall is a structure designed and constructed to resist lateral soil pressure when the desired change in ground elevation exceeds the soil’s angle of repose.
Hollow-core slab producer, the Echo Group, has introduced a new concept in retaining wall systems, Echo Gravity Retaining Walling (EGRW), which utilises precast concrete hollow-core slabs in combination with geotextile membrane.
One of South Africa’s largest steel manufacturers has ringed its Wadeville raw scrap processing plant with a formidable security wall made from toughened Echo prestressed hollow-core concrete panels – and in the process completely eliminated costly losses from scrap theft.
Echo slip-formed prestressed slabs are effectively purpose-made, manufactured to a standard 1200m width, which can be cut to non-standard widths as architectural design may prescribe
Hollow-core prestressed concrete flooring slabs provided the logical construction solution to the design challenges of this 24-block complex comprising 376 apartments. The use of Echo Prestress concrete flooring panels enabled the developers to complete the project much earlier than would have been possible had a conventional flooring construction method been employed.
The case studies recently conducted to compare the costs of pre-cast hollow-core concrete flooring systems against cast in-situ concrete floor slabs in