| Keywords |
FPSF; AFI; Frost depth; Foundation design for building; Foundation construction cost |
| Abstract |
This study investigates the applicability and cost-effectiveness of Frost Protected Shallow Foundations (FPSF) in Korea. FPSF, widely used in North America and Northern Europe, enables shallower foundation depths by preserving subsurface temperatures through insulation. While recent changes in Korean building codes permit thermal protection in lieu of deep excavation, practical design guidelines for FPSF remain absent. A simplified design method from ASCE 32-01 was adopted to assess FPSF application in three Korean regions? Taebaek, Seoul, and Suncheon. Foundation depths and insulation requirements were calculated using Korean freezing indices and compared with conventional frost-depth-based designs. Material quantities and construction costs were also estimated for both methods. Results show that FPSF reduces excavation depth by up to 1 meter, significantly lowering construction costs?by 5 to 10 million KRW per 100 m² building?depending on the region. Given Korea's high volume of small residential projects, national-scale adoption of FPSF could yield substantial economic and environmental benefits. The study concludes that Korea should establish regionally tailored FPSF guidelines, referencing proven international standards, and integrate them into national codes to promote sustainable and cost-efficient construction practices. |