Set out in this brochure are several examples demonstrating the versatility and multi-purpose functionality of the prestressed hollow-core slabs. Applications covered include floors, security walls, reservoir roofs, retaining walls and warehouse walling, multi-storey floor applications to residential, commercial and industrial buildings, as well as suspended ground floor slabs in clay areas and a foundation system for social housing.
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.
Rocla, specialist in precast concrete infrastructural products and solutions, showcased two of its new products at the annual IMESA Conference and Exhibition in October last year. The Rocla stand featured the new lightweight precast Wingwall units and the locally manufactured Alfabloc systems. Rocla is the first concrete manufacturer in South Africa to offer a complete range of precast Wingwall units to the market. These units have applications in culvert and storm water installations to ensure optimum hydraulic flow at both the inlets and outlets of these structures.
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.