The Benefits of Mid-Rise Construction In Timber · 2019-06-26 · •Benefits of timber...
Transcript of The Benefits of Mid-Rise Construction In Timber · 2019-06-26 · •Benefits of timber...
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PRESENTED BY SEAN GARDINER
The Benefits of Mid-Rise Construction In TimberFor The Construction Clients’ Group
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Photo by D-Max Photography
SLIDE 2
Photo by D-Max Photography
SLIDE 2
••
1. What Is Possible
2. Benefits of Timber Construction
3. Timber vs Steel braced frame
4. Challenges
5. How
6. Code Compliance
7. What’s next
8. Conclusion/Questions?
Contents
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SLIDE 17• Benefits of timber construction
• Cost savings (e.g. light timber-framed construction)
• Reduced building weight
- Reduced foundations (particularly for poor geotech)
- Reduced lateral structure (light and flexible)
- Opportunities for extension of building height
• Sustainable, low-carbon
• Broader pool of builders & Easily modified on site
• Potential programme savings
• Aesthetic- natural attraction of timber, “improved health and wellbeing”
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SLIDE 18•
Lendlease, Australia
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SLIDE 19• Timber compared to Steel Braced
Atlas Quarter
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SLIDE 20• Timber compared to Steel Braced
• NZ Timber Concept vs Steel Braced Frame
• Christchurch
• 10% saving on super-structure
• 30% ($300k) saving in piles
Atlas Quarter
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SLIDE 21• Challenges
• Timber Shrinkage and differential movement
• Noise Control
• Floor Vibration
• Fire Safety
• Cladding and Facades
• Market perception?
New Zealand Market
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SLIDE 22• What Challenges
.UK and North America for
decades
NZ Wood Design Guides
Mid-rise construction
handbook
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SLIDE 23• How? Light timber framing or CLT
• Concrete Podium
• Lightweight Timber Tower over
• Continuous Plywood Shearwalls
• Simplified Structural Design
• Wall Construction
- Double Stud Party walls
- Staggered Stud Corridor walls
- Single Stud Internal and External LB walls
• LVL
Mid-rise (4-6 storey) apartments
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SLIDE 24• How?
.Typical Floor
Construction
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SLIDE 25• How?
Shear Wall
Construction
• Seismic Performance (nail
slip)
• Take-Up Devices
• Flexible and Ductile
(reduced seismic loads)
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SLIDE 27• How?
• Services Integration
• Corridors
• Balconies
• Lift Shafts
• Time Efficiencies
• Pre-fabrication
• Modularisation
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SLIDE 28• Code Compliance?
• B1/VM1
• NZS1170.5 (Loadings)
• NZS3603 (Timber structures standard)
• Covered under current verification method
• Alternative solution and peer review may be required for low-
damage systems, such as rocking shear walls
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SLIDE 29• What Is Next?
.• Cross-Laminated Timber
(CLT)
• Portal Frames
• Glulam
• Laminated Veneer Lumber
(LVL)
• PRESSS-LAM
• Rocking Structures
• RSFJ-Tectonus
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SLIDE 30• Cross- Laminated Timber (CLT)
Available from:
Xlam- Nelson, New Zealand (also available in Australia)
https://www.xlam.co.nz/
Streamlined Building Solutions (ex Australia, imported from Europe)
http://www.streamlinedbuilding.com/
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SLIDE 31• CLT- Mahitahi example
• Approx. $11M residential development
• Used “3-layers” CLT (5 layers expensive
due to glue)
• CLT3/115 walls
• CLT3/135 floors
• Ductility μ =1.25-2.0
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Photo by D-Max Photography
CONTACT US
SLIDE 35SLIDE 35
•• Conclusion/Questions?
Sean Gardiner
Sector Leader – Structures
Calibre
03 371 0558 | 021 243 2553