This ÖNORM deals with the requirements, the basic performance criteria and evaluation of conformity for blocks made in normal or lightweight aggregate concrete, also in clay or polystyrene or alveolar plastic or wood composite, used in conjunction with beams in compliance with ÖNORM EN 15037-1 and/or cast-in-situ concrete (topping) for the construction of beam-and-block floor systems. Annex B of ÖNORM EN 15037-1 gives the typology of different types of floor systems.