Prestressed concrete hollow core slabs are precast concrete slabs with cavities running the full length of the slabs which are reinforced solely with prestressing steel. The precast slabs are joined at the site to form the floor. The construction technique offers numerous advantages: reduced weight and lower material consumption, nevertheless combined with high load-bearing capacities.

Regulatory framework

National technical approvals (abZ) were granted for prestressed concrete until October 2016. As a result of the implementation of the judgement of the European Court of Justice of 16 October 2014 in case C-100/13, national technical approvals are no longer granted for these products if they bear the CE marking on the basis of the Construction Products Regulation (Regulation (EU) No 305/2011). The products may not be marked with the national conformity mark. Approvals for which the period of validity has not yet expired are listed below. They can be used on a voluntary basis to prove fulfilment of the regulatory requirements.