The construction of conventional steel-reinforced concrete slabs is a significant contributor to CO2 emissions, primarily due to the substantial cement material requirement. To address this environmental concern, the use of carbon reinforcement presents an alternative that reduces material consumption. However, achieving sufficient stiffness in long slab elements with thinner profiles remains a challenge. In response, a novel approach is adopted, involving the development of hollow core slab system reinforced with a special net truss element (German: Netzgitterträger) that will allow the construction of hollow core elements for material saving. The Netzgitterträger (NetzGT) represents a specialized carbon reinforcement characterized by high-strength textile rovings, and serves as a multifunctional reinforcement in tension and shear zones. The trapezoidal geometry of the NetzGT reinforcement features a net-shaped prefabricated textile comprising diagonally offset rovings with overlapping edge strands. This innovative non-metallic reinforcement not only allows for material savings but also provides enhanced load-bearing capacity and durability due to its corrosion-resistant properties. Four-point bending tests have been conducted on the simulated cut-out elements of hollow core slab system. This research signifies a step towards environmentally conscious construction of slab elements by not only minimizing material resources and CO₂ emissions but also demonstrating the superior mechanical properties of carbon reinforcement in creating sustainable and resilient structural elements.