Efficient Construction with Wooden Elements

Jussi BjörmanDirector, Technical Customer Service

• Overview

• Elements & modules

• Off-site manufacturing and realized

projects

• OpenSourceWood.com

• Questions & Answers

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Content

The future is made from wood

Globalisation Technology Environment Urbanization

Global megatrends – Increasing demand for ecological products

The challenge

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Residential construction growth

CIC forecast

3.2% p.a.

2.4% p.a.

Source: Construction Intelligence Center 06/2020

Europe

Northern America

Asia

0

500

1 000

1 500

2 000

2 500

2006

2007

2008

2009

2010

2011

2012

2013

2014

2015

2016

2017

2018

2019

2020

2021

2022

2023

2024

Outp

ut valu

e b

n U

SD

0.8% p.a.

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Productivity in construction has not

increased

photographer Frank Barthel, 2017

Have you found ways to overcome the productivity challenge?

Wood construction –Fast, Light and Green

Revenue generated sooner

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Building Fast

reduction in building

time of a retail customer20%

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Light roof – Light building

Building Light

Lighter roof in a

logistic warehouse75%

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Carbon storage

Building Green

1 Tonne CO2

35 ft3

1 m3

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Elements & Modules

photographer Hans Koistinen, 2012

• Can be installed inside wall element. Anchoring and

shear locking on-site

• Strong panel requires less space and is ideal for walls

with lot of openings, short walls or non-vertically loaded

areas

• Allows stabilizing higher buildings

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Kerto LVL Q-panel as bracing panel

photographer Hans Koistinen, 2012

photographer Wood Program, 2009

• Kerto LVL Q-panels for eaves without beam supports

• Suitable also for roof edges due to cross veneer

structure

• Panel’s are designed using FEM software

• Suitable thicknesses from 51 to75 mm, (2 to 3”)

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Kerto LVL Q-panel for eaves and

overhangs

Metsä Wood, 2014

Metsä Wood, 2014

• Member can have shapes such as

– Arch

– Double tampered

– Curved

– Pitched cambered

– etc.

• Design parameters available for EN 1995-1-1 design

• Custom made with CNC-machine form rectangular

piece

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Allows freedom of shape

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photographer Mark Ashworth , 2016

• Free span with less material consumption 10m (30ft)

• More adaptability for space with less load-bearing walls

or beam

• Easy to connect from the top slab

• Element production in controlled conditions

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Floor elements for fast construction

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Link to Open Source Wood

photographer Hans Koistinen, 2012

• Possible to take full advantages from off-site

construction

• Fast to install, even 1,500m2 (16,000ft2) of finished roof

per day

• Lighter roof gives possibilities to save material with

foundations and with main load-bearing structures

• Less material waste and less work at construction site

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All-inclusive light roof elements

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Link to Open Source Wood

photographer Hans Koistinen, 2008

photographer Hans Koistinen, 2010

• Traditionally prefabricated and easy to element

• Offers improved quality and construction time safety

• Allows finishing to start earlier and shorter overall on-

site construction time

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Wall elements close quickly the

envelope

Link to Open Source Wood

photographer Hans Koistinen, 2012

photographer Tommi Aho, 2018

Case: Smart wall construction for element builder

Competitive advantages with Kerto LVL

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Example wall, 80mm (3.15”) CLT vs. 85mm (3.35”) Kerto LVL rib wall element

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• Allow to reduce waste due to openings

(windows & doors)

• Milling is not needed, cavity can be

used

• Kerto LVL brings material efficiency for

production allowing thinners structures 0

0,01

0,02

0,03

0,04

0,05

0,06

0,07

0,08

0,09

Kerto LVL rib wallelement

CLT panel

[m3/m

2]

• Extended off-site construction possibility with shorter

on-site construction time

• Offers the opportunity for construction process

development with full per work station sub-optimization

• Part of lean construction with minimal waste

• Factory production minimizes delays due to weather

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Endless possibilities with modules

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photographer Seppo Samuli, 2017

Image by Virtuel Architecture, 2017

Metsä Wood, 2017

Case: Bathroom modules

photographer Seppo Samuli, 2017

Off-site manufacturing and realized projects

Metsä Wood, 2017

Customer

Lapwall - Finland

Supplied products

Kerto LVL for floor and roof elements

Success factors

• Long term partnership and joint product development

• Deliveries of customized dimensions speed up,

minimize waste and enhance efficiency of the

production

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Industrially

manufactured elements

enable speed on-site

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Metsä Wood, 2017

Customer

Dupac - Belgium

Supplied products

Kerto LVL

Success factors

• Kerto LVL gives sufficient strength and light weight

• Dimensional stability ensures efficient production

• Cost efficient solution

Production video: https://youtu.be/5rqA-UjmpMw

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Efficient element

production

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photographer Frank Barthel, 2017

Kerto was chosen because it’s possible to build open

spaces which allow flexibility with light construction.

Customer

Helsinki Region Environmental Service Authority HSY

Location

Espoo, Finland

Products delivered

Kerto LVL elements, Glulam

Key success factors

• Free height of 12.5 m

• Horizontal bracing structure

Canopy with

preinstalled

waterproofing

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photographer Kimmo Räisänen, 2015

CUSTOMER

Hurlingham Racquet Centre, United Kingdom

SUPPLIED PRODUCTS

Kerto® LVL, Kerto-Ripa

SUCCESS FACTORS

• Shallow height of the wooden elements

• Allows to accommodate green roof

• High absorption and minimized reverberation

Green roof over tennis

court

Metsä Wood, 2017

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Cost-effectiveness and environmental values with quick

assembly – prefabricated structures for a terminal

extension

Customer

DB Schenker

Location

Vantaa, Finland (~2 km to airport)

Products delivered

Kerto® LVL, Kerto LVL elements, glulam

Key success factors

• Quick assembly and shorter construction time

• Smaller carbon footprint and cost-effectiveness

Kerto LVL in large scale

industrial buildings

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photographer Hans Koistinen, 2013

Building D(emountable) is a four-storey office building in Delft, the Netherlands was built with a hybrid structure: steel frame combined to wooden elements

CUSTOMERArchitecture office cepezed, the Netherlands

SUPPLIED PRODUCTSKerto® LVL

SUCCESS FACTORS

• It took only three weeks to erect the load-bearing structure consisting of a steel frame and wood elements

• Lightweight wood elements were easy to transport and handle at a historical city centre

• The building is planned so that it can be dismantled and moved to another location, if needed.

Fast construction with

hybrid structure

photographer Lucas van der Wee, 2019

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Mjörstornet reaches as completed over 80m (260ft) in

height

CUSTOMER

Moelven - Norway

ARCHITECT

Voll Arkitekter AS

SUPPLIED PRODUCTS

Kerto LVL Q-panel for floor elements

SUCCESS FACTORS

• Kerto LVL gives sufficient strength and light weight

• Strong and durable Kerto Q panels are used to stiffen

the intermediate flooring elements.

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Worlds tallest wooden

construction

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photographer Anti Hamar, 2019

Customer

City of Stockholm

Location

Stockholm, Sweden

Products delivered

Kerto® LVL

Key success factors

• Temporary wooden building kept the prestigious brand

alive, while being sustainable and reusable

• Big foundation was out of the question, so light

weighted Kerto LVL was a perfect choice

A nice ”wooden box”

became an established

market hall in Östermalm

Reference

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photographer Felix Gerlach, 2017

Customer

Bäderland Hamburg GmbH

Location

Hamburg, Germany

Products delivered

Kerto LVL Q-panels

Key success factors

• The Kerto LVL Q-panels ensured high strength values

at a relatively low thickness, with a very high load

capacity and dimensional stability

• Pre-fabricated wood elements made the installation

process significantly faster

Saving a historical bath

with Kerto LVL

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photographer Manfred Voss, 2016

Roofing with extremely

long wooden elements

A new indoor swimming pool in Luxemburg got a roof made

of 24 metres long wood elements.

CUSTOMER

Sports Centre Cents, Luxemburg

SUPPLIED PRODUCTS

Kerto® LVL

SUCCESS FACTORS

• The use of Kerto LVL in roof elements enabled 24

metres long spans.

• Kerto LVL provides the needed dimensional stability.

• The wooden rib ceiling is also visually attractive thanks

to Kerto LVL.

photographer Frank Barthel insevia GmbH, 2019

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• Kerto® LVL Fast, Light, Green articles:

https://www.metsawood.com/articles

• Article Wood element manufacturer partnerships:

https://www.metsawood.com/global/news-media/articles/Pages/wood-element-

manufacturer-partnerships.aspx

• Off-site construction video:

https://www.metsawood.com/global/news-media/videos/Pages/fast-light-green-

construction-wood-elements.aspx

• More information about the origin of wood:

https://www.metsagroup.com/en/Sustainability/sustainable-

forestry/Pages/default.aspx

• Free e-learning courses about timber products:

https://timberacademy.Metsawood.com24/06/2020 Metsä Wood35

More information

Open Source Wood gathers wood element designs and

connects professionals of wood construction

• FIND designs

• SHARE your own designs

• CONNECT with professionals

• GET SUPPORT from experts

Join and share your knowledge at

opensourcewood.com

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Open Source Wood

What could you share?

Questions & Answers

photographer Kimmo Syväri, 2014

• I have construction project

– All European countries have

producers

– Seek local offsite producers

– Look for offsite associations

– Utilise OpenSourceWood

• I have element production

– Check ideas for new element

production from OpenSourceWood

– For LVL you may take contact to

local Metsä Wood sales

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How to get forward?

photographer SPA-Bungalow.ch, 2018

• Structure design life usually 50

years

• Information for BIM design

• Product specific handbooks

available, European LVL handbook

– Element construction handbook not

know

• Moisture behaviour non-threated RH85% / 20°C, EN 1995-1-1

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Design

VVR Wood, photographer Henri Uotila, 2020

• Fire & acoustics according to local

regulations

• LVL based elements can achieve

resistance to fire class R120

• Connections generally with steel

fasteners (nails, screws, bolts)

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Design

photographer ClipHut, 2018

• Kerto LVL glue is inert after

hardening, biobased glues are been

researched

• Kerto LVL’s formaldehyde emission

fulfils tightest requirements existing

• There are not breakthroughs in LVL

recycling yet.

• Research on wooden element

manufacturing knowhow would

create benefits to the industry

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Other

photographer Tomi Aho, 2018