Skip header and navigation

2 records – page 1 of 1.

Gate-to-Gate Life-Cycle Inventory of Glued-Laminated Timbers Production

https://research.thinkwood.com/en/permalink/catalogue1469
Year of Publication
2005
Topic
Environmental Impact
Material
Glulam (Glue-Laminated Timber)
Author
Puettmann, Maureen
Wilson, James
Publisher
Society of Wood Science and Technology
Year of Publication
2005
Country of Publication
United States
Format
Journal Article
Material
Glulam (Glue-Laminated Timber)
Topic
Environmental Impact
Keywords
Life-Cycle Inventory
Gate-to-Gate
US
Language
English
Research Status
Complete
Series
Wood and Fiber Science
Summary
As part of the CORRIM Phase I research, this study completed a full gate-to-gate life-cycle inventory for the production of glued-laminated timbers (glulam) produced in two regions of the United States—the Pacific Northwest (PNW) and Southeast (SE). Data collected from surveys of manufacturers are presented for energy requirements, raw materials use, and emissions to land, water, and air allocated for one cubic meter and 1000 cubic feet of glulam. The glulam manufacturers surveyed represented 70 and 43% of the region's total glulam production for the PNW and SE, respectively. From both regions, 82% of the raw material and energy inputs and emission outputs were allocated to the glulam product, leaving the remaining 18% allocated to co-products. Contributions to the glulam process included impacts for the inputs of lumber and adhesives. Results show that wood drying and adhesive manufacturing make major environmental contributions to the glulam process. In addition, fuel sources, either biomass or fossilbased, have significantly different emission impacts to the environment. Wood fuel representing wood waste and hogged fuel accounted for nearly 50% of the cumulative energy consumed, while for wood fuel used for heat energy to dry lumber represented 65% and 100% for the PNW and SE glulam models. The cumulative energy from all fuel types including wood fuel allocated for one cubic meter of glulam was 6,748 MJ/m3 when manufactured in the PNW and 7,213 MJ/m3 when manufactured in the SE.
Online Access
Free
Resource Link
Less detail

Gate-to-Gate Life-Cycle Inventory of Laminated Veneer Lumber Production

https://research.thinkwood.com/en/permalink/catalogue1470
Year of Publication
2005
Topic
Environmental Impact
Material
LVL (Laminated Veneer Lumber)
Author
Wilson, James
Dancer, Eric
Publisher
Society of Wood Science and Technology
Year of Publication
2005
Country of Publication
United States
Format
Journal Article
Material
LVL (Laminated Veneer Lumber)
Topic
Environmental Impact
Keywords
Gate-to-Gate
Life-Cycle Inventory
US
Language
English
Research Status
Complete
Series
Wood and Fiber Science
Summary
A life-cycle inventory (LCI) study is conducted of laminated veneer lumber (LVL) manufacturing. This gate-to-gate study includes all environmental impacts from the logs to produce either veneer or parallel laminated veneer (PLV) as input to the LVL process, through production of the LVL. The study includes all materials, fuels, and electricity inputs to produce LVL and related co-products and emissions. The input and site emissions data were collected through surveys of manufacturing facilities in the Pacific Northwest and the Southeast regions of the U.S. SimaPro software, a program to conduct life-cycle inventory studies, is used to process the data and measure environmental impacts in terms of material use and emissions. The data are allocated on a mass basis to LVL based on their contribution to the mass sum of all product and co-products produced in manufacturing. All data are provided on a production unit basis of 1000 m3 and 1000 ft3 (MCF). In addition to the LCI data, carbon flow data are also given. These data are publicly available through reports, this publication, and the U.S. LCI Database Project. The data are useful forgenerating cradle-to-gate product LCIs when combined with the LCIs to produce logs as input to the plants and the transportation impacts to deliver materials. The data are useful as a benchmark for assessing process performance, for conducting life-cycle assessments of structural assemblies and the shell of residential and light commercial buildings.
Online Access
Free
Resource Link
Less detail