The shaded bands show the expected range of WUI-Frame (m³/m²) at each level of bio-based volume content, divided into four categories:
< 25%,
25–50%,
50–90% and
90–100%.
Upper and lower lines indicate the observed spread at each category boundary, interpolated linearly between breakpoints.
Level 2 Analysis - Frame URR & Bio Materials
This Level 2 dataset contains detailed frame-level material composition data for 9 timber building projects with Use Renewal Rate (URR) metrics. Unlike Level 1 data which focuses on overall timber usage, Level 2 provides granular breakdowns of bio-based materials, non-bio materials, reused materials, and cruciallyURR values indicating material reusability potential.
Key Metrics Analyzed:
• URR Code: Use Renewal Rate based on current building codes (range: 0.05 to 0.98)
• URR Potential: Theoretical maximum URR with ideal design (range: 0.09 to 1.71)
• BIO Vol.%: Percentage of frame volume that is bio-based (range: 19.4% to 97.3%)
• BIO Mass%: Percentage of frame mass that is bio-based (range: 4.5% to 81.7%)
• WUI-Frame (L2): Wood Usage Intensity at frame level (m³ timber / m² area)
• Material Composition: Timber, Bio materials, non-Bio materials, and Reused materials
Notable Observations: Projects show significant variation in both bio material content and reuse potential. Rigot (Switzerland) achieves the highest URR code (0.98) and potential (1.63), demonstrating exceptional circular economy design. In contrast, 2104 (Spain) has the lowest URR (0.05 code, 0.09 potential) despite being the only project with current REUSE volume (57% by mass), highlighting the gap between existing reuse practices and future potential.