Retrofitting timber house foundations on sloping sites - Build 183 (2021)
- Abbreviation
- Retrofitting timber house foundations on sloping sites
- Valid from
- 1/04/2021
- Information provider
- BRANZ Limited,
- Information type
- BUILD article,
- Format
- Website, PDF,
Description
Houses built on sloping sites have performed poorly in recent earthquakes. BRANZ experiments have shown how to retrofit pre-1960s timber house foundations to significantly improve seismic performance.
Scope
This article includes the following:
- Differing stiffness causes problems
- Four different foundations tested
- Pre-1960s and NZS 3604:2011 foundations
- Weight added and shaking begins
- Piles rocked noticeably
- Retrofitting improved performance
- Results can be applied to houses