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87 records – page 1 of 9.

An Application of the CEN/TC350 Standards to an Energy and Carbon LCA of Timber Used in Construction, and the Effect of End-of-Life Scenarios

https://research.thinkwood.com/en/permalink/catalogue2376
Year of Publication
2013
Topic
Energy Performance
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Author
Symons, Katie
Moncaster, Alice
Symons, Digby
Year of Publication
2013
Format
Conference Paper
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Topic
Energy Performance
Keywords
Embodied Carbon
Life-Cycle Assessment
Built Environment
End of Life
LCA
Europe
Conference
Australian Life Cycle Assessment Society conference
Research Status
Complete
Summary
The use of timber construction products and their environmental impacts is growing in Europe. This paper examines the LCA approach adopted in the European CEN/TC350 standards, which are expected to improve the comparability and availability of Environmental Product Declarations (EPDs). The embodied energy and carbon (EE and EC) of timber products is discussed quantitatively, with a case study of the Forte building illustrating the significance of End-of-Life (EoL) impacts. The relative importance of timber in the context of all construction materials is analysed using a new LCA tool, Butterfly. The tool calculates EE and EC at each life cycle stage, and results show that timber products are likely to account for the bulk of the EoL impacts for a typical UK domestic building.
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An innovative resource-efficient timber-concrete-composite ceiling system: Feasibility and environmental performance

https://research.thinkwood.com/en/permalink/catalogue2872
Year of Publication
2021
Topic
Mechanical Properties
Environmental Impact
Market and Adoption
Material
Timber-Concrete Composite
Application
Ceilings
Author
Kromoser, Benjamin
Holzhaider, Philipp
Organization
University of Natural Resources and Life Sciences
Publisher
Wiley Online Library
Year of Publication
2021
Format
Journal Article
Material
Timber-Concrete Composite
Application
Ceilings
Topic
Mechanical Properties
Environmental Impact
Market and Adoption
Keywords
Resource-Efficient Structural Engineering
Structural Optimization
Life Cycle Analysis
Research Status
Complete
Series
Civil Engineering Design
Summary
Timber-concrete composite (TCC) ceilings build on the idea of making use of the advantageous properties of both materials symbiotically. While concrete, as the upper layer, is used to absorb the compression forces, wood is used in the lower layer to absorb the tensile forces. Many systems have been developed with special attention paid to solutions with both a continuous concrete and wood layer. This article introduces a new system developed with the primary focus set on the most efficient material use by introducing a free space between the concrete and the wood layer using special vault shaped moldings. The first part of the paper contains an introduction including a short overview of different embodiments of TCC floor systems. The second part focuses on the design of the new system and gives an overview of the estimated structural performance. In the third part the environmental performance of the new system is discussed in comparison to chosen existing systems focusing at the the whole life-cycle including a re-use (A-D).
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Assessing Cross Laminated Timber (CLT) as an Alternative Material for Mid-Rise Residential Buildings in Cold Regions in China—A Life-Cycle Assessment Approach

https://research.thinkwood.com/en/permalink/catalogue1209
Year of Publication
2016
Topic
Energy Performance
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Author
Liu, Ying
Guo, Haibo
Sun, Cheng
Chang, Wen-Shao
Publisher
MDPI
Year of Publication
2016
Format
Journal Article
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Topic
Energy Performance
Keywords
Life-Cycle Assessment
Cradle-to-Grave
China
Cold Regions
Severe Cold Regions
Energy Consumption
Mid-Rise
Residential
Research Status
Complete
Series
Sustainability
Summary
Timber building has gained more and more attention worldwide due to it being a generic renewable material and having low environmental impact. It is widely accepted that the use of timber may be able to reduce the embodied energy of a building. However, the development of timber buildings in China is not as rapid as in some other countries. This may be because of the limitations of building regulations and technological development. Several new policies have been or are being implemented in China in order to encourage the use of timber in building construction and this could lead to a revolutionary change in the building industry in China. This paper is the first one to examine the feasibility of using Cross Laminated Timber (CLT) as an alternative solution to concrete by means of a cradle-to-grave life-cycle assessment in China. A seven-storey reference concrete building in Xi’an was selected as a case study in comparison with a redesigned CLT building. Two cities in China, in cold and severe cold regions (Xi’an and Harbin), were selected for this research. The assessment includes three different stages of the life span of a building: materialisation, operation, and end-of-life. The inventory data used in the materialisation stage was mostly local, in order to ensure that the assessment appropriately reflects the situation in China. Energy consumption in the operation stage was obtained from simulation by commercialised software IESTM, and different scenarios for recycling of timber material in the end-of-life are discussed in this paper. The results from this paper show that using CLT to replace conventional carbon intensive material would reduce energy consumption by more than 30% and reduce CO2 emission by more than 40% in both cities. This paper supports, and has shown the potential of, CLT being used in cold regions with proper detailing to minimise environmental impact.
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Assessing Life-Cycle Environmental Impacts of CLT Mass Timber Buildings in the U.S. Northeast Region

https://research.thinkwood.com/en/permalink/catalogue2535
Topic
Environmental Impact
Material
CLT (Cross-Laminated Timber)
Organization
Forest Products Laboratory
The Nature Conservancy
University of Washington
Consortium for Research on Renewable Industrial Materials
Atelierjones
Material
CLT (Cross-Laminated Timber)
Topic
Environmental Impact
Keywords
Life-Cycle Assessment
GHG emission reduction
Research Status
In Progress
Notes
Project contact is Hongmei Gu at the Forest Products Laboratory
Summary
The FPL team is in charge of developing a full comparative LCA study for three multiple-story mass timber buildings and their concrete alternatives in the U.S. Northeast region, with Boston as the point location. Using these three comparative LCAs, this research will determine the GHG emissions reduction potential from mass timber use in the building sector for the U.S. region. This may increase potential for growth in wood utilization, timber harvest, and forest management practices through the market demands.
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Assessment of Carbon Footprint of Laminated Veneer Lumber Elements in a Six Story Housing - Comparison to a Steel and Concrete Solution

https://research.thinkwood.com/en/permalink/catalogue2135
Year of Publication
2013
Topic
Environmental Impact
Design and Systems
Material
LVL (Laminated Veneer Lumber)
Glulam (Glue-Laminated Timber)
Application
Wood Building Systems
Author
Tellnes, Lars
Eide, S.
Kristjansdottir, Torhildur
Kron, M.
Year of Publication
2013
Format
Conference Paper
Material
LVL (Laminated Veneer Lumber)
Glulam (Glue-Laminated Timber)
Application
Wood Building Systems
Topic
Environmental Impact
Design and Systems
Keywords
GHG
Carbon Footprint
Life-Cycle Assessment
Concrete
Conference
Sustainable Built Environment Portugal
Research Status
Complete
Summary
Many actions have been taken to decrease the operational energy use in buildings. However, with higher energy efficiency standards, the focus is increasingly shifting to energy demand for the production of building materials and the related greenhouse gas emissions. When moving towards zero emission buildings, the developments of more sustainable bearing structure are of interest. A six story housing complex was constructed in Gothenburg, Sweden in 2012 with a structure made of laminated veneer lumber floor elements and glue laminated beams and columns. The use of laminated veneer lumber has the advantage of being a light weight solution. Building with wood in Norway is generally regarded as a carbon efficient solution, but the impact of additional materials such as glue and insulation can influence the overall results is of interest. Life cycle assessment is used as a tool to calculate the carbon footprint in the production of the main building materials of the structure. The goal of the assessment is to compare the wood structure as built with an equivalent steel and concrete structure and to optimise the use of materials. The scope of the assessment includes the foundation and elevator shaft, structural beams and columns and the floor elements. The results indicate that the steel and concrete alternative have about 35% higher greenhouse gas (GHG) emissions than the as built wood solution, but that almost half of the total emissions are related to the foundation and elevator shaft.
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Brock Commons Tallwood House, University of British Columbia: An Environmental Building Declaration According to EN 15978 Standard

https://research.thinkwood.com/en/permalink/catalogue2158
Year of Publication
2018
Topic
Environmental Impact
Material
CLT (Cross-Laminated Timber)
Glulam (Glue-Laminated Timber)
Application
Hybrid Building Systems
Author
Bowick, Matt
Organization
Athena Sustainable Materials Institute
Year of Publication
2018
Format
Report
Material
CLT (Cross-Laminated Timber)
Glulam (Glue-Laminated Timber)
Application
Hybrid Building Systems
Topic
Environmental Impact
Keywords
Life-Cycle Assessment
Brock Commons
Cradle-to-Grave
Research Status
Complete
Summary
This document presents a whole-building environmental life cycle assessment (LCA) of the University of British Columbia (UBC) Brock Commons Tallwood House (herein referred to as Tallwood House), a student residence building in Vancouver, British Columbia. The LCA was commissioned to publicly declare the environmental performance of the building. The assessment has been conducted in conformance with the Committee for European Standardization (CEN) standard EN 159781, which stipulates an LCA-based calculation method and reporting requirements for whole-buildings or building parts. While European in scope, EN 15978 provisions are quickly becoming the standard for whole-building LCA worldwide. We therefore applied our North American interpretation of EN 15978 as a suitable methodological choice to meet the purpose of the assessment.
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Free
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Building Affordable Housing with Mass Timber

https://research.thinkwood.com/en/permalink/catalogue2783
Topic
Market and Adoption
Application
Wood Building Systems
Organization
Sustainable Northwest
Hacienda Community Development Group
Application
Wood Building Systems
Topic
Market and Adoption
Keywords
Mass Timber
Residential Buildings
Life Cycle Analysis
Project Financing
Affordable Housing
Research Status
In Progress
Summary
Sustainable Northwest (SNW) and Hacienda Community Development Group (HCDC), both based in Oregon, have proposed a plan to demonstrate pathways for building affordable housing with regionally sourced mass timber. In response to the region’s housing shortage, the partners’ proposal demonstrates the use of mass timber products while supporting efforts to educate stakeholders on wood product companies and forest restoration. The project outlines a plan to explore financing options, build one or more prototypes, and perform a structural material life cycle analysis.
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Carbon Footprint Benchmarking of BC Multi-Unit Residential Buildings

https://research.thinkwood.com/en/permalink/catalogue2159
Year of Publication
2017
Topic
Environmental Impact
Material
Glulam (Glue-Laminated Timber)
LVL (Laminated Veneer Lumber)
Light Frame (Lumber+Panels)
PSL (Parallel Strand Lumber)
Application
Hybrid Building Systems
Author
Bowick, Matt
O'Connor, Jennifer
Organization
Athena Sustainable Materials Institute
Year of Publication
2017
Format
Report
Material
Glulam (Glue-Laminated Timber)
LVL (Laminated Veneer Lumber)
Light Frame (Lumber+Panels)
PSL (Parallel Strand Lumber)
Application
Hybrid Building Systems
Topic
Environmental Impact
Keywords
Carbon Footprint
Residential Buildings
Multi-Unit
Embodied Carbon
Life-Cycle Assessment
Cradle-to-Grave
Research Status
Complete
Summary
This is a pilot project to establish an embodied carbon footprint performance target for new multi-unit residential building (MURB) construction. This project has demonstrated that compiling the bills of materials of multiple buildings and deriving a useable benchmark based on this information is methodologically and practically possible. The report presents several recommendations on how to proceed with this important initiative based on the project findings.
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Free
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Carbon impacts of engineered wood products in construction

https://research.thinkwood.com/en/permalink/catalogue3235
Year of Publication
2021
Topic
Environmental Impact
Author
Gu, Hongmei
Nepal, Prakash
Arvanitis, Matthew
Alderman, Delton
Organization
Forest Products Laboratory
Publisher
IntechOpen
Year of Publication
2021
Format
Book/Guide
Topic
Environmental Impact
Keywords
Life-Cycle Assessment
Mass Timber Products
Forest Carbon
Wood Products Carbon
Carbon Sequestration
Carbon Storage
Avoided Emissions
Research Status
Complete
Summary
Buildings and the construction sector together account for about 39% of the global energy-related CO2 emissions. Recent building designs are introducing promising new mass timber products that have the capacity to partially replace concrete and steel in traditional buildings. The inherently lower environmental impacts of engineered wood products for construction are seen as one of the key strategies to mitigate climate change through their increased use in the construction sector. This chapter synthesizes the estimated carbon benefits of using engineered wood products and mass timber in the construction sector based on insights obtained from recent Life Cycle Assessment studies in the topic area of reduced carbon emissions and carbon sequestration/storage.
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Free
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Carbon Value Engineering: Integrated Carbon and Cost Reduction Strategies for Building Design

https://research.thinkwood.com/en/permalink/catalogue2268
Year of Publication
2019
Topic
Environmental Impact
Cost
Material
CLT (Cross-Laminated Timber)
Glulam (Glue-Laminated Timber)
Application
Floors
Walls
Beams
Author
Robati, Mehdi
Oldfield, Philip F.
Nezhad, Ali Akbar
Carmichael, David
Organization
UNSW Sydney
Multiplex Australasia
Publisher
Cooperative Research for Low Carbon Living
Year of Publication
2019
Format
Report
Material
CLT (Cross-Laminated Timber)
Glulam (Glue-Laminated Timber)
Application
Floors
Walls
Beams
Topic
Environmental Impact
Cost
Keywords
Value Engineering
Embodied Carbon
Hybrid Life Cycle Assessment
Capital Cost
Environmentally-extended Input-Output Analysis
Research Status
Complete
Summary
The research presents a Carbon Value Engineering framework. This is a quantitative value analysis method, which not only estimates cost but also considers the carbon impact of alternative design solutions. It is primarily concerned with reducing cost and carbon impacts of developed design projects; that is, projects where the design is already a completed to a stage where a Bill of Quantity (BoQ) is available, material quantities are known, and technical understanding of the building is developed. This research demonstrates that adopting this integrated carbon and cost method was able to reduce embodied carbon emissions by 63-267 kgCO2-e/m2 (8-36%) when maintaining a concrete frame, and 72-427 kgCO2-e/m2 (10-57%) when switching to a more novel whole timber frame. With a GFA of 43,229 m2 these savings equate to an overall reduction of embodied carbon in the order of 2,723 – 18,459 tonnes of CO2-e. Costs savings for both alternatives were in the order of $127/m2 which equates to a 10% reduction in capital cost. For comparison purposes the case study was also tested with a high-performance façade. This reduced lifecycle carbon emissions in the order of 255 kgCO2-e/m2, over 50 years, but at an additional capital cost, due to the extra materials. What this means is strategies to reduce embodied carbon even late in the design stage can provide carbon savings comparable, and even greater than, more traditional strategies to reduce operational emissions over a building’s effective life.
Online Access
Free
Resource Link
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87 records – page 1 of 9.