IS 14804:2000 is the Indian Standard (BIS) for siting, design and selection of materials for residential buildings in hilly areas - guidelines. This standard provides guidelines for the siting, planning, design, and selection of materials for residential buildings in hilly areas. It emphasizes safety against natural hazards like landslides, earthquakes, and floods, and promotes construction practices that are in harmony with the fragile hill environment.
Siting, Design and Selection of Materials for Residential Buildings in Hilly Areas - Guidelines
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
| Parameter | IS Value | International | Source |
|---|---|---|---|
| Recommended Max. Natural Slope for Building | Should preferably not exceed 30 degrees. | No absolute limit, but slopes over 1:3 (approx. 18.5°) typically require an engineered design and geotechnical report. | IBC 2021 (Jurisdictional practice) |
| Foundation Setback from Slopes | Qualitative advice to avoid crest/toe of slope. | Must be set back from the slope face by at least H/3 (H=slope height), up to a maximum of 40 ft (12.2 m). | IBC 2021 (Sec 1808.7) |
| Maximum Slope for Man-made Fills | Generally 1V:1.5H (approx. 34 degrees). | Shall not be steeper than 1V:2H (approx. 27 degrees or 50% grade) unless justified by a geotechnical engineer. | IBC 2021 (Appendix J) |
| Roof Design for Snow | Sloping roofs > 22.5 degrees recommended to facilitate sliding of snow. | Design is based on calculated snow load which decreases with increasing slope (significant reduction for slopes > 30 degrees). | ASCE/SEI 7-22 (Chapter 7) |
| Retaining Wall Height Requiring Design | Prescribes gravity walls for up to 3-4m; implies engineering is needed above this. | Any retaining wall with a retained height > 4 ft (~1.2 m) must be designed by a registered professional. | IBC 2021 (Sec 1807.2) |
| Building Configuration for Seismic Areas | Recommends simple rectangular, compact and symmetric plans. | Quantifies penalties for plan irregularities (e.g., torsional effects, re-entrant corners) in seismic force calculations. | ASCE/SEI 7-22 (Chapter 12) |