Hollow-core concrete slabs

Elematic SA (Pty) Ltd manufactures precast concrete hollow core slabs for the South African market. They satisfy the demand for high quality, reliable products that are available within short lead times in an industry where the demand for building products is almost insatiable and completion times are short. They supply the latest available technology in precast concrete products and set new benchmarks in the industry. Their production facility on Gauteng’s East Rand received ISO 9001 certification in 2009 and their product is SABS approved.

Elematic slabs are one of the most advanced precast concrete products in the industry. They offer a full spectrum of services from design and manufacturing to transport and installation. Products can be used in a wide variety of horizontal and vertical applications. Fast turnaround and construction times can save their clients time and money. Elematic\’s technology produces precast hollow core concrete slabs of excellent quality – this is truly a world class product!

Horizontal applications


  • Multi-storey townhouse complexes
  • Multi-storey flats
  • Multi-storey residential housing
  • Multi-storey industrial and commercial parks
  • Multi-storey schools
  • Multi-storey hotels
  • Multi-floor Stadiums
  • Multi-storey parkades
  • Train stations
Vertical applications

High strength security walling for the following applications:

  • Prisons
  • Military bases
  • Airports
  • Hospitals
  • Retaining walls
  • Vehicle/all storage facilities
Advantages of hollow care slabs:
  • Can be used in a wide range of applications such as floors, roofs and walls.
  • A highly automated production process.
  • Smooth even bottom surfaces mean false ceilings can be omitted.
  • Good sound insulation properties.
  • Because of the longitudinal cores, weight of the floor is reduced.
  • The voids in hollow core can be used for technical installations, i.e. ventilation conduits, plumbing and electrical pipes etc.
  • Short construction time, absence of scaffolding, high mechanical and durability performance, excellent span-depth ratio and good flexibility in design.
  • Hollow core can be designed to meet different fire class requirements.
  • Hollow core can be used with all types of supporting structures i.e. bearing walls, skeletal concrete structures or steel frames.
  • The reduced weight of slabs gives savings in foundations and structures.
  • Longer spans, less support, more freedom in floor plan design.
  • Dry erection – only the joints need to be concreted.
Prestressing strand types used
  • 9.3 mm and 12.5 mm stabilized strand
Accepted bearing tolerances
  • On brickwork 100 mm
  • On concrete 75mm
  • On steel 75 mm
Ratio L/50 Fire rating
  • 1 hour standard, higher ratings can be achieved