Brochure Precast concrete plants | Vollert english

6 THE BASIC DECISIONS IN PRECAST CONCRETE PRODUCTION The choice of the right construction system is decisive for the future design of the production plant. In making this choice, a wide variety of criteria have to be considered, such as climate, the seismic hazard, the labour market, commodity prices or country-specific regulations such as taxes and regulations. Solid walls and floors Solid walls and slabs consist of 10 - 40 cm thick solid concrete elements made of normal or lightweight concrete and built-in structural reinforcement and are often used for basement walls and for ground and upper-floor walls (load bearing or non load bearing). In situ concrete is not needed; large precast elements guarantee rapid construction progress. Floor slabs The floor slab is a reinforced concrete slab with a thickness of 5 - 7 cm, depending on the concrete cover and amount of rein- forcement. The torsionally stiff reinforcement required for struc- tural rigidity and the flexural tension reinforcement required lengthways and crossways are usually pre-installed. Additional in-situ concrete turns the floor slab into a solid reinforced concrete floor. Double walls The double wall consists of concrete slabs with a thickness of 5 - 7 cm each, which are held together by a truss-type rein- forcement. After installation, the remaining void is filled with in situ concrete – creating a monolithic, dense and extremely solid concrete element. Sandwich walls Sandwich walls have an insulating layer enclosed by concrete on both sides. The load-bearing shell, with the structural reinforcement, is on one side and the visible shell on the other. Double walls with insulation Core-insulated double walls have insulation installed between the concrete slabs. This combination opens up new application possibilities and ensures high energy efficiency. Hollow core slab A novel manufacturing process makes it possible to produce prestressed hollow core slabs on pallets in a circulation system. This enables each hollow core slab to be produced to the required component geometry and dimensions without the need for cutting.