Timber Houses and Buildings in New Zealand Presentation at CTT CORMA14 May 2010 Graeme Beattie, Principal Structural Engineer, BRANZ

1. Timber Houses and Buildings in New Zealand Graeme Beattie, Principal Structural Engineer, BRANZ (graeme.beattie@branz.co.nz) Presentation at CTT CORMA 14 May 2010

3. Timber Framed Houses Older houses – before 1980

4. Timber Framed Houses New houses – since 1980

5. Timber Framed Houses

6. Timber Framed Houses Pressed metal roof tiles Brick as a cladding – not structural

8. Typical Timber Framing Truss Wall frame Timber floor

12. Wall Bracing Test (BRANZ P21) Jack and loadcell Test Specimen (Drywall) Load Load is cyclic to increasing Displacements www.branz.co.nz

13. Example Hysteresis Loops

14. Wall Bracing Hold down Concrete Floor on ground 25mm x 1mm strap wrapped under plate and nailed to stud 12mm bolt and 50mm square washer

17. Multistorey LTF

18. Joints Between Tenancies Important to maintain continuity of floor diaphragm Floor Topping Plasterboard

20. Multistorey - Heavy Sections University of Canterbury STIC Project www.stic.co.nz for other information/videos