Specific Gravity and Mechanical Properties of Black, Red, and White Spruce and Balsam Fir PDF Download
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Author: B. Alan Bendtsen
Publisher:
ISBN:
Category : Balsam fir
Languages : en
Pages : 32
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Book Description
Author: B. Alan Bendtsen
Publisher:
ISBN:
Category : Balsam fir
Languages : en
Pages : 32
Get Book Here
Book Description
Author: B. Alan Bendtsen
Publisher:
ISBN:
Category :
Languages : en
Pages : 28
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Book Description
Nine mechanical properties and the specific gravity of black, red, and white spruce and balsam fir were measured on material collected at random from the growth range of each species. Significant changes, with 95% confidence, were observed in 31 to 40 instances (four species, five properties, and two moisture contents) that are commonly used in lumber and plywood design. Design values for modulus of elasticity and proportional limit in compression perpendicular to grain are based upon sample estimates of the mean. Average values for these properties are, in 9 of 16 instances, significantly higher than previous estimates. In only one case, the proportional limit of white spruce in the green condition, this study revealed a significant reduction. In modulus of rupture, compressive strength parallel to grain, and shear strength, design is based upon a 5% exclusion limit derived from the sample average and standard deviation.
Author: F. J. Hallauer
Publisher:
ISBN:
Category :
Languages : en
Pages : 10
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Book Description
Author:
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ISBN:
Category : Forest genetics
Languages : en
Pages : 266
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Book Description
Author:
Publisher:
ISBN:
Category : Forest genetics
Languages : en
Pages : 692
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Book Description
Author:
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ISBN:
Category : Agriculture
Languages : en
Pages : 1240
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Book Description
Author:
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ISBN:
Category : Forest management
Languages : en
Pages : 378
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Author:
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ISBN:
Category : Forest products
Languages : en
Pages : 564
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Author: Michael Carl Wiemann
Publisher:
ISBN:
Category : Forest products
Languages : en
Pages : 28
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Book Description
Author: Helmuth M. Steinhilb
Publisher:
ISBN:
Category : Balsam fir
Languages : en
Pages : 28
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Book Description
Presents the weights and centers of gravity for the green trees and boles of balsam fir, white spruce, and red pine for use in the design of harvesting equipment.
