Usability Assessment of House-Type Shelters in Austrian Forest and Nature-Based Children’s Groups: A Case Study

Forest and nature-based children’s groups in Austria prioritize outdoor learning but rely on small “house-type” shelters for changing, meals, and stays during inclement weather. Despite the central role in daily operations, no systematic, standards-based evaluation of these shelters has been reported in the peer-reviewed literature. To address this gap, a standardized risk assessment tool—grounded in Austrian laws, technical standards, and insurer guidance—was developed and applied to ten shelters across nine groups (spring 2025). This represents, to our knowledge, the first empirical benchmarking of house-type shelter compliance against established safety, ergonomic, and usability requirements for this setting. The assessment covered 10 functional domains and three risk levels (low, medium, and high). Associations between compliance and shelter characteristics (floor area per child, total area, operator, building type) were examined using Spearman correlations and Kruskal–Wallis tests (α = 0.05). Findings revealed frequent deviations from current standards, with implications for accident risk and staff ergonomics. Key shortcomings included insufficient room height (60.7% of rooms < 2.5 m), sub-minimum door height (60% < 2.0 m) with absent finger-pinch protection (89.7%), and inadequate daylighting (68.8% of rooms below the 12% floor-area threshold). Additional hazards involved child-height openable windows posing head-impact risks (68.8%) and lacking safety locks (100%), sharp stair edges (80%), and missing or inadequate handrails (adults 90%; children 70%). Further gaps were insufficient smoke detection (60% of buildings; 50% of rooms), inaccessible switch heights (100% of rooms > 85 cm), and furnishing deficits (coat-hook spacing: 75% < 30 cm; adult seating: 83.3% undersized; adult tables: 80% absent). No statistically significant associations were detected between compliance and shelter characteristics. However, descriptive trends suggested higher compliance in shelters with more spacious layouts and those operated by private entities. Deviations were classified by retrofit effort: low-effort, high-impact retrofits (e.g., finger guards, window restrictors, compliant handrails, stair edge rounding, and networked smoke detectors) can rapidly reduce risk. Structural modifications (e.g., room and door heights, daylighting, switch accessibility) require early consideration during planning or may necessitate special-use permits. The assessment tool and the empirical deviation profile provide a transferable, evidence-based framework to guide upgrades and design decisions, balancing pedagogical aims with safety, ergonomics, and social sustainability. By addressing a critical research gap in the built infrastructure of forest and nature-based children’s groups, this study offers a replicable methodology and first actionable benchmarks for practitioners, planners, and regulators.