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Cross Laminated Timber 14 November 2012
Robin Jack
www.xlam.co.nz
Rebuilding Canterbury with Wood
What is Cross Laminated Timber?
3, 5, 7 or more layers of wood laminated together with grain direction of each layer alternating
Layers usually from 19mm to 45mm thick, assembled symetrically
Any thickness up to 400mm, depending on strength characteristics needed.
Any length up to 15m
Any width up to 3.4m
Walls, roof or floor elements - can combine with
ee timber, glulam or LVL to build box beams etc
Low grade material can be buried in the core layers
CLT Panels - the basic production steps
1. Computerised Crosscutting 2. Fingerjointing 3. Planing to size
4. Layup & Pressing 5. CLT ready for machining
First CLT Panel made in the Southern Hemisphere
XLam NZ Ltd Nelson April 2012
First commercial production of CLT in NZ, July 2012
Panels ready for despatch
First CLT Site in NZ – Waiheke Island 18 July 2012
First CLT Floor in NZ – Waiheke Island 18 July 2012
First CLT Floor in NZ – Waiheke Island 18 July 2012
First CLT Floor in NZ – Waiheke Island 18 July 2012
Flexibility for earthquake protection
Vacuum Pressed CLT 5 x 30mm = 150mm thick
Vacuum Pressing of CLT Roof Elements
First XLam Cassette Panel, September 2012
Vacuum Pressed CLT Box Beam Element – Tests
Vacuum Pressed Floor-Ceiling Element
Weinmann CNC Bridge
Getting started with CLT - the XLam Design Guide
CLT: Walls, Floors & Ceilings
Murray Grove Apartments, London
1+8 stories
Footprint: approx 350m2
CLT Volume: 950 m3
Walls: 128mm thick
Floors: 146mm thick
Shell Const Time: 3 days per floor
Labour: Crew of 4 carpenters
CLT saved 22 weeks v concrete (30%)
Basement avoided since no need for
heating system
No tower crane used
All apartments sold off plans in 1 day
Cross Laminated Timber – Key Benefits
• Low mass – quake resistant, good for soft soils
• Quick to build = big labour & finance savings
• Consistent & verifiable quality standards
• Predictable costs
• Energy efficient – thermal mass and airtightness
• Healthy buildings – reduced public heath costs
• Usable attic spaces = more efficient use of land
• Relocatable & recyclable buildings
• Carbon sequestration = sustainability
Thanks for your attention!
Robin Jack
www.xlam.co.nz