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