Improved Utilization Of Lumber In Glued Laminated Beams
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Improved Utilization Of Lumber In Glued Laminated Beams
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Author : Russell Charles Moody
language : en
Publisher:
Release Date : 1977
Improved Utilization Of Lumber In Glued Laminated Beams written by Russell Charles Moody and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1977 with Laminated wood categories.
Improved Utilization Of Lumber In Glued Laminated Beams
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Author : Russell Charles Moody
language : en
Publisher:
Release Date : 1977
Improved Utilization Of Lumber In Glued Laminated Beams written by Russell Charles Moody and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1977 with Laminated wood categories.
Evaluation of 120 glued laminated (glulam) beams provided criteria for improved utilization of lumber in such beams. Objectives were: (1) to determine if lumber grade can be somewhat reduced on the compression side of beams without significantly changing design strength; (2) to establish analytic procedures for incorporating lumber having had its modulus of elasticity (e) determined (E-rated lumber) into glulam beams; and (3) to determine the effect on beam properties of using lumber with limited wane. The procedures developed will provide those preparing specifications a wider raw material base for glulam timber, resulting in more efficient use of our timber resource.
Efficient Utilization Of Red Maple Lumber In Glued Laminated Timber Beams
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Author : John J. Janowiak
language : en
Publisher:
Release Date : 1995
Efficient Utilization Of Red Maple Lumber In Glued Laminated Timber Beams written by John J. Janowiak and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Red maple categories.
Improved Utilization Of Small Diameter Ponderosa Pine In Glued Laminated Timber
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Author :
language : en
Publisher:
Release Date : 2005
Improved Utilization Of Small Diameter Ponderosa Pine In Glued Laminated Timber written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Forest fires categories.
Improved Use Of Ponderosa Pine In Glulam Beams
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Author : Roland Hernandez
language : en
Publisher:
Release Date : 2005
Improved Use Of Ponderosa Pine In Glulam Beams written by Roland Hernandez and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Laminated wood categories.
In the United States, almost 300 million acres of forests are severely overcrowded with small-diameter, densely stocked trees. These forests need to be thinned to improve their health and reduce the risk of catastrophic wildfire. However, thinning is an expensive task, costing from $200 to $1,500 per acre. Traditionally, there has not been a market for this material once it has been thinned. Uses for small-diameter wood must be found and markets for the products created in order to offset the cost of thinning. For several years, the Forest Products Laboratory (FPL) has conducted cooperative studies with local communities and industry to improve the use of wood from small-diameter trees. One of the most common species in these stands is ponderosa pine. Preliminary testing on ponderosa pine lumber indicates that if mechanical grading technology is applied, this material could be used in higher valued structural applications such as glued-laminated timber (glulam).
Improved Performance Of Southern Pine Structural Glued Laminated Timber
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Author : Roland Hernandez
language : en
Publisher:
Release Date : 1992
Improved Performance Of Southern Pine Structural Glued Laminated Timber written by Roland Hernandez and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Laminated wood categories.
Improved Utilization Of Small Diameter Ponderosa Pine In Glulam Laminated Timber
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Author : United States Department of Agricutlure
language : en
Publisher: CreateSpace
Release Date : 2015-02-14
Improved Utilization Of Small Diameter Ponderosa Pine In Glulam Laminated Timber written by United States Department of Agricutlure and has been published by CreateSpace this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-02-14 with Reference categories.
This study involved the evaluation of ponderosa pine glulam made from lumber that was sawn from a small-diameter timber resource. Two different glulam beam depths were evaluated: 8 and 13 laminations. A comprehensive glulam test program was conducted to evaluate edgewise and flatwise bending, shear, and tensile strength. Beam deflection was measured and a variety of glulam MOE values were determined. The calculated design values for various mechanical properties of this new ponderosa pine glulam beam combination were compared to the published design values of the L3 glulam combination. Using mechanically graded lumber in the glulam combination resulted in a structural member that efficiently utilized this small-diameter ponderosa pine resource. The calculated design values of this new glulam combination are a significant improvement over the published design values of the all ponderosa pine L3-grade combination that is currently available in the standards.
Strength And Stiffness Of Reinforced Yellow Poplar Glued Laminated Beams
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Author :
language : en
Publisher:
Release Date : 1997
Strength And Stiffness Of Reinforced Yellow Poplar Glued Laminated Beams written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with Laminated wood categories.
In bridge applications, it is often necessary to minimize the depth of the bridge structure to provide for the required hydraulic opening or reduce the volume of approach fill. For bridges that utilize structural glued-laminated (glulam) timber beams as stringers, reinforcement using thin strips of pultruded E-glass-fiber-reinforced plastic (GFRP) composites may permit reduced depth, because the reinforcement has the potential to increase stiffness and strength. This study is part of an overall effort aimed at evaluating the potential for commercial production of glulam-GFRP beams in current wood laminating plants and a wood adhesive compatible with existing equipment. Twelve Yellow-Poplar glulam GFRP beams were commercially manufactured, and their performance was evaluated. The GFRP panels were bonded to the wood with a resorcinol formaldehyde adhesive to provide the reinforcement. The simplicity of the process used to manufacture the test beams indicates that the commercial production of glulam-GFRP beams is feasible. Increases of 18 percent in stiffness and 26 percent in strength were achieved by adding 3 percent of GFRP by volume. The bending strength values of the beams predicted by the ASTM D3737 procedure correlate well with the experimental values. However, the observed delamination of the reinforcement indicates that improved bonding strength of wood--GFRP interfaces is needed. Results of this study will be useful to manufacturers interested in improving the performance of glulam timber beams.
Variation Of Mechanical Properties In Oak Boards And Its Effect On Glued Laminated Timber
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Author : Cristóbal Tapia Camú
language : en
Publisher: Cuvillier Verlag
Release Date : 2022-03-23
Variation Of Mechanical Properties In Oak Boards And Its Effect On Glued Laminated Timber written by Cristóbal Tapia Camú and has been published by Cuvillier Verlag this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-03-23 with Science categories.
The renewable material wood and hereof derived structural engineered wood products (EWPs) is widely acknowledged as being the major pillar of sustainable building constructions. Due to an increasing availability and high mechanical performance the wood resource hardwoods has been gaining traction for the use in EWPs, typically dominated by softwoods. Wood, being a naturally grown material, exhibits a pronounced variation in its mechanical properties, presenting marked differences not only between species, but also between individual trees and locally throughout the stem of each tree. Glued laminated timber (GLT) reduces this variation by vertical glue-stacking previously finger-jointed boards to form a highly homogenized wooden beam. This configuration reduces considerably the variation of the observed global mechanical properties of GLT with respect to the individual boards. However, the rather complex material composition of GLT prohibits the derivation of an analytical relation between local (e.g. intra board and finger-joints) and global properties, thus numerical approaches need to be applied. This work addresses the need for an improved understanding and modeling approach of the variability of stiffness and strength along and between boards, and the resulting impact on the size-effect of GLT made of oak.
Efficient Utilization Of Red Maple Lumber In Glued Laminated Timber Beams
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Author : John J. Janowiak
language : en
Publisher:
Release Date : 1995
Efficient Utilization Of Red Maple Lumber In Glued Laminated Timber Beams written by John J. Janowiak and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with categories.