Banner for LabNotes
From Lab Notes
Contact Information
Forest Products Laboratory
One Gifford Pinchot Drive
Madison, WI 53726-2398
Phone: (608) 231-9200
Fax: (608) 231-9592


You are here: FPL Home  / Information Products & Services  / Publications

Requested Product

Title: Nondestructive evaluation of the tensile properties of structural lumber from the spruce-pine-fir species grouping: relationship between grain angle and energy loss

Source: Res. Note. FPL-RN-0382. Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory. 14 p.

Author(s)As, Nusret ; Senalik, C. Adam; Ross, Robert J.; Wang, Xiping

Publication Year: 2020  View PDF »

Category: Research Notes
Associated Research Project(s):   FPL-4714-1B

Abstract: This study was undertaken to examine the relationship between lumber grain angle and the energy loss characteristics of structural lumber. A random sample of 100 spruce–pine–fir lumber specimens was obtained from a local lumber yard. Grain angle was measured at numerous locations for each specimen with equipment that uses a dielectric nondestructive testing technique. A commonly used free transverse vibration test, in which the specimens were simply supported in a flatwise bending mode, was used to determine the energy loss characteristics of the specimens. Increases in grain angle resulted in greater energy loss. A statisically significant positive correlative relationship was found between grain angle and energy loss. More importantly, based on results from this study, energy loss measurements may be useful for detecting lumber with low strength values.

Keywords: Transverse vibration; lumber; grain angle; nondestructive evaluation

Publication Review Process: Informally Refereed (Peer-Reviewed)

File size: 2,048 kb(s)

Date posted: 09/24/2020

This publication is also viewable on Treesearch:  view
RITS Product ID: 99442
Current FPL Scientists associated with this product (listed alphabetically)
Ross, Robert J.
Supervisory Research Gen. Engineer
Senalik, Christopher
Research General Engineer
Wang, Xiping
Research Forest Products Technologist

Additional items that might interest you
View the video celebrating FPL's 100 years of public service in 2010, from the producers of the Greatest Good....view

Research Highlights from FPL....view

Termite Eradication: A search for the Holy Grail.... view

Moisture Management in Residential Construction Series videos...view

Wood Floor Systems in Residential Construction Series videos....view
- FPL's Mission and Strategic Plan -

FPL's mission is to identify and conduct innovative wood and fiber utilization research that contributes to conservation and productivity of the forest resource, thereby sustaining forests, the economy, and quality of life. ... ..more »

- FPL Research Emphasis Areas -
Advanced Composites

As an integral part of the FPL mission, we improve the long-term sustainability of our Nation's forests by creating valuable composite products from biobased materials ... ..more »

Advanced Structures

The FPL has been in the forefront of wood-frame housing research since 1910 and has long been recognized as a world leader in such housing-related areas as engineered wood ... ..more »

Forest Biorefinery

We all know the compelling reasons that the United States needs to reduce its dependence on fossil fuels. Historically, the greatest increases in energy demand have been for transportation fuels ... ..more »


A leader in wood products research for over a century, the FPL is positioning itself to become the lead Federal research facility for the application of nanotechnology in forest products ... more »

Woody Biomass Utilization

Forests in the United States contain a substantial amount of small-diameter, overstocked, and underutilized material.FPL research projects are exploring the potential of the small-diameter ... ..more »