The Effect of Moisture Content on the Tensile Strength of Southern Pine Lumber
Author: Bambang Suryoatmono
Publisher:
Published: 1994
Total Pages: 420
ISBN-13:
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Author: Bambang Suryoatmono
Publisher:
Published: 1994
Total Pages: 420
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DOWNLOAD EBOOKAuthor: David William Green
Publisher:
Published: 1994
Total Pages: 36
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DOWNLOAD EBOOKAuthor:
Publisher:
Published: 1986
Total Pages: 156
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DOWNLOAD EBOOKAuthor: David W. Green
Publisher:
Published: 2001
Total Pages: 56
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DOWNLOAD EBOOKAuthor: T. E. McLain
Publisher:
Published: 1984
Total Pages: 48
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DOWNLOAD EBOOKAuthor: Franklyn J. Wilson
Publisher:
Published: 1981
Total Pages: 392
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DOWNLOAD EBOOKAuthor: C. C. Gerhards
Publisher:
Published: 1972
Total Pages: 544
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DOWNLOAD EBOOKAuthor: A. Louis DeBonis
Publisher:
Published: 1980
Total Pages: 7
ISBN-13:
DOWNLOAD EBOOKThe effect of moisture content on the strength and stiffness of southern pine dimension lumber is being investigated. Three visual grades (Select Structural, No. 2 and No. 3) and three sizes (2x4, 2x6 and 2x8) are being conditioned to four target moisture content conditions (10%, 15%, 20% and green). The lumber is being non-destructively evaluated in a flatwise orientation for determination of Modulus of Elasticity (MOE) and is then tested to failure in edgewise bending to evaluate MOE and Modulus of Rupture (MOR). It is anticipated that the relationships found will be used for the development of an analytical model describing the effect of moisture content on the strength and stiffness of visually-graded southern pine dimension lumber. (Author).
Author: David William Green
Publisher:
Published: 1990
Total Pages: 40
ISBN-13:
DOWNLOAD EBOOKAuthor:
Publisher:
Published: 1984
Total Pages: 40
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DOWNLOAD EBOOKBased 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.