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Efficient Construction with Wooden Elements
Jussi BjörmanDirector, Technical Customer Service
• Overview
• Elements & modules
• Off-site manufacturing and realized
projects
• OpenSourceWood.com
• Questions & Answers
24/06/2020 Metsä Wood3
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
11
Building Fast
reduction in building
time of a retail customer20%
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12
Light roof – Light building
Building Light
Lighter roof in a
logistic warehouse75%
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13
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
Metsä Wood17
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
18
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
19
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
21
• 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
22
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
25
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
24/06/2020 Metsä Wood
Efficient element
production
26
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
31
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
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