SA Affordable Housing November - December 2018 // Issue: 73 - Page 10

NEWS Injecting new life into concrete retaining block market Pretoria-based concrete block paving and precast concrete kerb producer, MVA Bricks, has taken the concrete retaining block (CRB) wall market by the scruff of the neck. The 3 700m² CRB wall at the new Cummins Southern Africa Regional Distribution Centre site at Waterfall Park, Midrand, MVA Brick’s first major CRB project. S ince launching two block types, the MVA-7 and the MVA-13, MVA Bricks has won at least half a dozen major CRB wall projects in Gauteng and Mpumalanga. It has also supplied numerous smaller projects. “Production began in June last year,” says MVA general manager, Brennan Small, “and our first major order followed shortly thereafter when we supplied the new Cummins MVA Bricks general manager, Brennan Small, next to one of the CRB walls at the site of the new Cummins Southern Africa Regional Distribution Centre. 8 NOVEMBER - DECEMBER 2018 Southern Africa Regional Distribution Centre and Filtration Plant development in Waterfall Park, Midrand, with 26  000 MVA-7 blocks. These were used in the construction of a CRB fill-wall facing on a large building platform. “Since then we have delivered MVA-7 blocks to several other major retaining wall projects including the Courier Guys Phase 2 distribution centre development in Kya Sands (24  000); a new Builders Warehouse in Midrand (19 000); a new industrial park on the R21 near Oliver Tambo International Airport (12  000); a new industrial park in Nelspruit (8 000); and Thulamahashe Plaza, some 200km from Nelspruit (3  400).” Small says the MVA-7 has a flat face and is designed for economical open-faced wall construction. As its name suggests, it is generally used on the basis of seven blocks per square metre, although this can be increased to a 10-block configuration when required. “The MVA-13 is quite different. It has a rounded half-moon face and is designed for upmarket commercial walls in closed-faced designs. A heavier block, it has a much greater load-bearing capacity and can be deployed in walls with wall face angles which vary between 60˚ and 90˚. “The MVA-7 has a locking mechanism which restricts its usage to wall faces of between 60˚ and 75˚. However, it can be