Author:
Publisher:
ISBN:
Category : Douglas fir
Languages : en
Pages : 38
Book Description
The Influence of Moisture Content on the Flexural Properties of Douglas Fir Dimension Lumber
The Influence of Moisture Content on the Flexural Properties of Douglas Fir Dimension Lumber
The Influence of Moisture Content on the Flexural Properties of Southern Pine Dimension Lumber
Effect of Moisture Content on Flexural Properties of Douglas-Fir Dimension Lumber
Moisture Content and Tensile Strength of Douglas Fir Dimension Lumber
Author: David William Green
Publisher:
ISBN:
Category : Douglas fir
Languages : en
Pages : 40
Book Description
Publisher:
ISBN:
Category : Douglas fir
Languages : en
Pages : 40
Book Description
Strength-moisture Relations for Wood
Author: Thomas Randall Carson Wilson
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 96
Book Description
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 96
Book Description
Evolution of Standardized Procedures for Adjusting Lumber Properties for Change in Moisture Content
Author: David W. Green
Publisher:
ISBN:
Category : Forest products industry
Languages : en
Pages : 56
Book Description
This paper documents the development of procedures in American Society for Testing and Materials standards for adjusting the allowable properties of lumber for changes in moisture content. The paper discusses the historical context of efforts to establish allowable properties on a consensus basis, beginning in the 19th century. Where possible, the reasons for proposed changes in the standards are presented. The goal of this work is to foster a better understanding of how current standards have evolved and to promote reconciliation of conflicting property assignment procedures between current standards.
Publisher:
ISBN:
Category : Forest products industry
Languages : en
Pages : 56
Book Description
This paper documents the development of procedures in American Society for Testing and Materials standards for adjusting the allowable properties of lumber for changes in moisture content. The paper discusses the historical context of efforts to establish allowable properties on a consensus basis, beginning in the 19th century. Where possible, the reasons for proposed changes in the standards are presented. The goal of this work is to foster a better understanding of how current standards have evolved and to promote reconciliation of conflicting property assignment procedures between current standards.
The Influence of Moisture Content on the Flexural Properties of Southern Pine Dimension Lumber
Author:
Publisher:
ISBN:
Category : Lumber
Languages : en
Pages : 40
Book Description
Based on the study results we conclude that: (1) In general, drying increases the flexural properties of Southern Pine dimension lumber. (2) Improvements in Moduli of Rupture (MOR) and Moduli of Elasticity (MOE) with drying are significant for Select Structural lumber at virtually all levels of the cumulative frequency distribution. The magnitude of the increase for mean MOE and fifth percentile MOR for Select Structural lumber appears to exceed that assumed in ASTM standard D245-81 for lumber dried to an equilibrium Moisture Content (MC) of 15%. (3) The degree of improvement in strength as lumber dries decreases as lumber quality decreases and width increases. For lower grades and wider widths, the 25% increase in fifth percentile MOR assumed in D245-81 appears excessive. (4) The effect of MC on MOE is relatively independent of lumber size and quality. (5) Drying lumber to an average MC less than 15% cannot usually be justified on the basis of improvements in flexural strength and stiffness.
Publisher:
ISBN:
Category : Lumber
Languages : en
Pages : 40
Book Description
Based on the study results we conclude that: (1) In general, drying increases the flexural properties of Southern Pine dimension lumber. (2) Improvements in Moduli of Rupture (MOR) and Moduli of Elasticity (MOE) with drying are significant for Select Structural lumber at virtually all levels of the cumulative frequency distribution. The magnitude of the increase for mean MOE and fifth percentile MOR for Select Structural lumber appears to exceed that assumed in ASTM standard D245-81 for lumber dried to an equilibrium Moisture Content (MC) of 15%. (3) The degree of improvement in strength as lumber dries decreases as lumber quality decreases and width increases. For lower grades and wider widths, the 25% increase in fifth percentile MOR assumed in D245-81 appears excessive. (4) The effect of MC on MOE is relatively independent of lumber size and quality. (5) Drying lumber to an average MC less than 15% cannot usually be justified on the basis of improvements in flexural strength and stiffness.
The Effect of Moisture Content on the Tensile Properties Parallel to the Grain of Douglas Fir Dimension Lumber, Final Report
Author: Roy F. Pellerin
Publisher:
ISBN:
Category : Douglas fir
Languages : en
Pages :
Book Description
Publisher:
ISBN:
Category : Douglas fir
Languages : en
Pages :
Book Description