Veneer recovery of Douglas-fir from the Coast and Cascade Ranges of Oregon and Washington.

Fahey, Thomas D.; Willlts, Susan A.

doi:10.2737/pnw-rp-439

Cited by 3 publications

(5 citation statements)

References 2 publications

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“…A study conducted by Fahey and Willits (1991) shows that logs with less than 30 cm of diameter should not be peeled. The results in Table 2 confirm the low recovery rate of these assortments.…”

Section: Discussionmentioning

confidence: 99%

Recovery rate and quality of rotary peeled veneer from 30-year-old Pinus taeda L. logs

Dobner

Nutto

Higa

2013

Annals of Forest Science

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& Context In the construction sector, wood is facing competition with other materials such as concrete, steel or plastics. Therefore, there is a need for more efficiency in the forestwood chain by improving silvicutural management and wood processing technologies. & Aims The objective of the study is to analyse the influence of log diameter and quality to recovery rate, veneer quality and economic benefit. & Methods The trees used in the study came from a 30-yearold Pinus taeda L. thinning trial in Southern Brazil. In total, 57 logs (20.7 to 67.0 cm) were peeled following the standard industrial processing methods of the plywood mill. & Results Average recovery rate was 54 % ranging from 35 to 72.6 %, with a linear trend (R 2 =0.48) of increasing recovery with an increment on the log small-end diameter. Results show that the gap between theoretically possible and real recovery was lower in the logs with bigger diameters, indicating their higher efficiency in industrial processing. Moreover, the economic analysis detected that the current prices for log assortments reflect only the industrial potential of low-quality pruned logs. An optimised pruning strategy would result in higher industrial efficiency, which would allow higher log prices. & Conclusion The results indicate that the recovery rate of bigger logs is higher in terms of volume of peeled veneer. The quality and therefore the value obtained from each log were negatively influenced by inadequate pruning strategies. Management of pines for higher value utilisation requires optimized thinning and pruning strategies in order to meet high growth rates and proportionally bigger dimensions of clear wood.

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Section: Discussionmentioning

confidence: 99%

Recovery rate and quality of rotary peeled veneer from 30-year-old Pinus taeda L. logs

Dobner

Nutto

Higa

2013

Annals of Forest Science

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“…Logs are generally selected for veneer production on the basis of diameter, straightness and roundness as these affect the conversion efficiency and the quality of the veneer sheets (Fahey and Willits, 1991;Wiedenbeck et al, 2004). Many species, both hardwood and softwood, are capable of yielding acceptable veneers.…”

Section: Peeling and Slicing To Produce Veneersmentioning

confidence: 99%

“…Many species, both hardwood and softwood, are capable of yielding acceptable veneers. Fast-grown logs often yield veneer with a rougher surface or veneer that splits more easily during handling and are more difficult to glue, thus resulting in higher losses (Fahey and Willits, 1991). Logs are generally selected for veneer production on the basis of diameter, straightness and roundness as these affect the conversion efficiency and the quality of the veneer sheets (Fahey and Willits, 1991;Wiedenbeck et al, 2004).…”

Section: Peeling and Slicing To Produce Veneersmentioning

confidence: 99%

Processing of wood for wood composites

Moore¹,

Cown²

2015

Wood Composites

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“…All these studies have reported favourable veneer recovery rates and mechanical properties from small logs. Engineered wood products manufactured from veneers recovered from young hardwood plantation logs can exceed the mechanical properties of similar products manufactured from mature-age softwood (e.g., Pinus species) plantation logs (Gaunt et al 2003;De Carvalho et al 2004;Rahayu et al 2015).…”

Section: Introductionmentioning

confidence: 99%

“…The value of logs at the lathe for production of veneer-based engineered wood products is determined by green veneer recovery and utility after drying the green veneer (Fahey and Willlts 1991). Green veneer recovery from log volume is affected by the residual cylindrical peeler core diameter, as well as log dimensions and geometry.…”

Section: Introductionmentioning

confidence: 99%

Accommodating log dimensions and geometry in log procurement decisions for spindleless rotary veneer production

Venn¹,

McGavin²,

Ergashev

2020

BioRes

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Information to support efficient log procurement decisions based on log cost as well as volume and value of veneer produced from log volume is scarce. The objective of this study was to systematically investigate the effect of log dimensions and geometry (small-end diameter under bark (SEDUB), taper, sweep, and ovality) on the recovery of marketable veneer from log volume, and to produce a metric to support efficient log procurement decisions. The metric developed was the maximum that could be paid for mill-delivered logs of a specific log geometry (MDLCmax) while attaining a target gross margin. In decreasing order of impact on the net recovery of marketable veneer from log volume, the log characteristics were sweep, SEDUB, taper, and ovality. In an Australian case study, log dimensions and geometry were found to substantially affect MDLCmax. Relative to a 2.6-m cylindrical log, taper of 0.01 m/m of log length decreased MDLCmax $10/m3 and sweep of 0.01 m/m of log length decreased MDLCmax $20/m3. This metric is useful for supporting log procurement decisions of the timber industry.

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Veneer recovery of Douglas-fir from the Coast and Cascade Ranges of Oregon and Washington.

Abstract: This file was created by scanning the printed publication. Text errors identified by the software have been corrected; however, some errors may remain.

Cited by 3 publications

References 2 publications

Recovery rate and quality of rotary peeled veneer from 30-year-old Pinus taeda L. logs

Recovery rate and quality of rotary peeled veneer from 30-year-old Pinus taeda L. logs

Processing of wood for wood composites

Accommodating log dimensions and geometry in log procurement decisions for spindleless rotary veneer production

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