Figure 3
The diagram presents a vertical construction section through a floor and partition wall junction, illustrating a hollow slimline floor system detailing integrated services. At the top left, a note titled “Floor construction” lists “20 millimeters floor finishing (by buyer), 70 millimeters screed with underfloor heating, Lewis floor, 15 millimeters acoustic separation, slimline structural floor”. The floor buildup is shown horizontally on both the left and right sides of a central dividing wall. A label at the upper right reads “disconnect floor section at dividing wall”. At the center is a division wall identified by text: “division wall 60 minutes per sound insulation value R a greater than 62 decibels. Drawing shows 215 millimeters Gyproc SoundBloc Wall 191 with 15-millimeter gap, construction and connections as per supplier”. The wall consists of two framed stud assemblies with cross-hatched insulation infill and plasterboard linings on each face. Horizontal dimension callouts at mid-height show 100 millimeters to the left and 100 millimeters to the right of the central cavity, with 15 millimeters at the center, giving an overall wall thickness of 215 millimeters. A lower horizontal dimension string reads, from left to right, “117.5, 215, 117.5”, spanning the full width beneath the wall. Between the upper and lower floor slabs is a large vertically hatched rectangular zone labeled in bold: “INSTALLATION, DUCTS, PIPING and WIRING CAVITY”, indicating the service void. This cavity spans the full width between apartments and vertically connects the upper and lower floor assemblies. At the top of this cavity, a horizontal dimension of 370 millimeters is shown across the wall base, with additional dimensions of 40 millimeters at both sides, left and right. Small filled circular symbols appear along the base of the wall at this level, indicating fixing or support points. On the right side of the cavity, a small note marks “fire seal” at the slab penetration. Vertical level markers on the right show “FLOOR LEVEL” at the top, with stacked vertical dimensions including 70 millimeters (screed), 15 millimeters (acoustic separation), and a larger overall vertical dimension labeled 433 millimeters above the cavity and 518 millimeters spanning from floor level down toward the service zone (units implied as millimeters). On the left side, additional vertical dimensions are provided: 193 millimeters extending downward from the slab into the upper portion of the cavity, and a larger dimension of approximately 604 millimeters running from near the top of the cavity to its lower edge. These measurements are shown with arrows indicating their top-to-bottom extents. Below the service cavity, the same Gyproc SoundBloc division wall configuration repeats, with mirrored stud framing and cross-hatched insulation. Structural slabs are depicted as solid gray layers with aggregate texture, while the Lewis sheet floor system is drawn in bold lines within the screed layer above. A small “3” dimension appears near the lower wall base, indicating a minor clearance or joint thickness at the bottom connection. At the bottom center, beneath the lower wall assembly, a circular “A S” marker is shown, indicating the referenced detail location. The drawing also includes multiple small solid circular markers at wall–floor interfaces, representing connection or bearing points. Overall, the figure documents acoustic and fire-rated separation between apartments, the 215-millimeter central partition, the vertically continuous services cavity, and the layered floor construction with integrated radiant heating, with dimensions annotated across left, right, center, top, and bottom to clarify wall thicknesses, cavity height, slab offsets, and floor buildup.Floor and partition wall detailing Patch22. Hollow Slimline floor system with free positioning of drains and wiring. The (drawn in bold lines) Lewis sheet with screed layer and integrated radiant heating is installed by the private contractor of the individual buyers. In this detailing, the legal separation between the upper and lower apartments is unclear. Source: Created by authors