Engineered Properties of Wood, Wood Materials and Structures
FS-FPL-4714
More Information |
o |
Information by Topic |
|
|
o |
|
|
|
o |
Publications by Author |
|
|
o |
Modeling Programs |
|
|
o |
Wood Handbook |
|
|
o |
Staff Directory |
|
|
|
Strength Effects:
Incising and Preservative Treated Wood
Principal Investigator: Dr. Jerrold E. Winandy
March 1, 2000
Project Objective:
Development
of a basic understanding of how, why, and to what extent incising and
preservative treatment effects the mechanical
properties of lumber, timber, and glulam.
Tangible Benefits:
To develop a data
base and understanding of principles from which practical guidance can
be given to the engineering community
and to standards organizations for a rational basis for developing design
adjustment factors for incised and preservative-treated lumber and glulam.
Results:
A series of studies evaluated
nominal 2 x 4 Douglas fir, Hem Fir, and SPF-south lumber incised before
treatment with two commercial
incising patterns and then treated with CCA, ACZA, or ACQ-B preservative.
The results described the effects of incising and preservative treatment
on bending strength (pdf1998/winan98a.pdf) and torsional shear strength
(pdf1998/morre98a.pdf).
Using this data, a predictive “Incising Effects Model” was
developed for nominal 2-inch thick lumber (pdf1998/winan98b.pdf). That
model reasonably predicted the effects of incising and preservative
treatment on bending stiffness and bending strength. Additional work
is needed to verify the application of the predictive “Incising
Effects Model” to timber and glulam.
Users:
Wood engineers, treaters
Funding:
State and Federal funding,
industrial support
|