Structural wall section plan for residential building module showing reinforced concrete wall configuration at -3.000m elevation level. The drawing displays grid axis system with alphanumeric designations (A-E, 1-8/2) defining structural layout, in essence, with precisely positioned MEP penetrations and service openings. Wall segments feature defined thicknesses and are interconnected at key junctions with dimensional coordinates provided for plumbing and utility pathways. Notable elements include multiple circular pipe penetrations with dimensional coordinates (X=4400.477, Y=9411.645 and others) and organized wall segments arranged in a modular pattern. The section includes technical elevation references between -0.200m and -0.300m, creating a comprehensive structural-mechanical interface documentation for construction coordination.