One-way reinforced concrete slab with Holedeck H-ONE formwork: case study

Abstract This article documents the design, calculation and commissioning process of an office building with one-way reinforced concrete floor slabs with perforated ribs, obtained using the 68 cm H-ONE system. This is the first project to use this type of formwork, designed by Holedeck and BIS structures. In the work carried out, this solution resulted in a saving of 0.214 m³/m² (50%) of concrete and 10.4 kg/m² (29%) of passive steel in the slab compared to a solution based on reinforced concrete slabs. This material saving resulted in a reduction in CO₂ emissions of 85 kgCO₂/m² (45%) according to the life cycle analysis of the building. When considering the entire structure, this reduction was 57% higher, as lightening the floor slab also reduces the size of the columns and foundations.