Download or read book Structural Composite Lumber Manufacturing written by W. Ernest Hsu and published by Createspace Independent Publishing Platform. This book was released on 2016-03-21 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: There are many types of structural composite lumber (SCLs) commercially available now, and some new SCLs may come on stream in the near future. The SCLs that have prevailed in North America can be exemplified by glue-laminated timber (glulam), laminated veneer lumber (LVL), parallel strand lumber (PSL), and oriented strand lumber (OSL) or laminated strand lumber (LSL). Of these, glulam, LVL, and PSL are in mature stages, while OSL and LSL are still in their infant stages. The growing market potential of LSL is high because the LSL manufacturing technology can be further improved, particularly as its strand orientator (aka orienter) is substantially improved. Consequently, the production cost of LSL can be reduced and product properties can be enhanced. In general, different types of SCLs can be engineered to meet structural performance. The manufacture of SCL relies heavily on experience rather than the laws of science. Unfortunately, some experiences are biased because they are drawn from the manipulation of one or two variables without consideration of possible interactions with other factors. As a result, many SCL manufacturers have experienced start-up and growing pains in trying to engineer and produce low-cost products for specific applications while maximizing their profit. Nevertheless, the SCL industry has cumulatively amassed a lot of experiences and knowledge about manufacturing quality SCL. These experiences and knowledge are transferable, and any new SCL manufacturers can learn from these experiences and knowledge so that they need not make similar mistakes and go through similar start-up and growing pains as established manufacturers have already experienced. Nearly any new mill will have the same, or similar, equipment and processes as are used in existing mills manufacturing the same type of SCL. New manufacturers often learn from the experiences of the existing mills, both good and bad. However, it is essential to avoid experiencing the same problems encountered by the established mills. Otherwise, new SCL mills will fail to have a competitive edge over existing mills. One of my objectives in writing this book is to provide comprehensive information on the basics of SCL manufacturing. Another objective is to share my knowledge about SCL, experiences in research and development of SCLs, and practical experiences in the field. Hopefully, this book will help new manufacturers not make the same mistakes as established manufacturers, as well as assist established manufacturers with getting rid of bad practices. Although most of the basic information and knowledge of manufacturing different SCLs in this book can be found in existing published reports and books, this is probably the first book focused on SCL that covers the gamut of SCL manufacturing issues, including raw materials, equipment, processes, manufacturing parameters, challenges, and solutions for various kinds of SCL manufacturers. I have also attempted to highlight the important avenues necessary to make quality products at minimal production costs, and given my own thoughts of further improvement in product quality, processes and equipment.
Download or read book Fire Resistance of Structural Composite Lumber Products written by Robert H. White and published by . This book was released on 2006 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Shear Strength of Structural Composite Lumber Using Torsion Tests written by R. Gupta and published by . This book was released on 2005 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: Torsion tests were used to determine the shear strength of full-size structural composite lumber (SCL). Eighty-five rectangular specimens of laminated strand lumber (LSL), laminated veneer lumber (LVL), and parallel strand lumber (PSL) were tested. LSL failed along the strand (LT Plane) and in a brittle manner. LVL and PSL failed across the veneer/strand (LR plane) and in a ductile manner. Different failure modes were observed due to the differences in the shear moduli in two longitudinal planes (GLT and GLR). Based on orthotropic theory, the shear strength of LSL, LVL, and PSL is 6.43 MPa (TLR), 7.96 MPa (TLT), and 6.82 MPa (TLT), respectively. Based on the results of this study, the torsion test is recommended as a standard method for determining the pure shear strength of full-size SCL, since it is the only known test method to date that imposes a state of pure shear stress in the specimens.
Download or read book Structural composite lumber written by and published by . This book was released on 1999 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Research and Development of COM PLY Lumber written by Robert H. McAlister and published by . This book was released on 1989 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fire Resistance of Structural Composite Lumber Products written by United States Department of Agriculture and published by CreateSpace. This book was released on 2015-02-14 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: Use of structural composite lumber products is increasing. In applications requiring a fire resistance rating, calculation procedures are used to obtain the fire resistance rating of exposed structural wood products. A critical factor in the calculation procedures is char rate for ASTM E 119 fire exposure. In this study, we tested 14 structural composite lumber products to determine char rate when subjected to the fire exposure of the standard fire resistance test. Char rate tests on 10 of the composite lumber products were also conducted in an intermediate-scale horizontal furnace. The National Design Specification/Technical Report 10 design procedure for calculating fire resistance ratings of exposed wood members can be used to predict failure times for members loaded in tension. Thirteen tests were conducted in which composite lumber products were loaded in tension as they were subjected to the standard fire exposure of ASTM E 119. Charring rates, observed failure times in tension tests, and deviations from predicted failure times of the structural composite lumber products were within expected range of results for sawn lumber and glued laminated timbers.
Download or read book Pilot Study of Shear Strength of Structural Composite Lumber I Configuration written by Winnie Yick Man Louis and published by . This book was released on 1997 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wood Composites written by Martin P Ansell and published by Woodhead Publishing. This book was released on 2015-07-24 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent progress in enhancing and refining the performance and properties of wood composites by chemical and thermal modification and the application of smart multi-functional coatings have made them a particular area of interest for researchers. Wood Composites comprehensively reviews the whole field of wood composites, with particular focus on their materials, applications and engineering and scientific advances, including solutions inspired biomimetrically by the structure of wood and wood composites. Part One covers the materials used for wood composites and examines wood microstructure, and wood processing and adhesives for wood composites. Part Two explores the many applications of wood composites, for example plywood, fibreboard, chipboard, glulam, cross-laminated timber, I-beams and wood-polymer composites. The final part investigates advances in wood composites and looks at the preservation and modification of wood composites, environmental impacts and legislative obligations, nano-coatings and plasma treatment, biomimetic composite materials, the integration of wood composites with other materials and carbonized and mineralized wood composites. Comprehensively reviews the entire field of wood composites in a single volume Examines recent progress in enhancing and refining the performance and properties of wood composites by chemical and thermal modification and the application of smart multi-functional coatings Explores the range of wood composites, including both new and traditional products
Download or read book Timber Rivets in Structural Composite Lumber written by Ronald W. Wolfe and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Constitutive and Analytical Models for Structural Composite Lumber with Applications to Bolted Connections written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fire Resistance of Structural Composite Lumber Products written by Robert H. White and published by . This book was released on 2006 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Length Effects in Tensile Strength in the Orthogonal Directions of Structural Composite Lumber written by Sanjay R. Arwade and published by . This book was released on 2011 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: The natural variation of strength properties within brittle materials leads to the phenomenon of size effect which causes the expected strength of a material to decrease as the stressed volume increases. An important implication of size effect is that size adjustment parameters must be incorporated into multi-axial constitutive and failure models used in numerical simulations such as those made using the finite element method. These size adjustments are based on the sizes of the individual elements, rather than the size of the structural member. This experimental study seeks to determine whether such a size effect is present in the orthotropic principal material directions of parallel strand lumber (PSL) and laminated veneer lumber (LVL), and, if the effect is present, to quantify it. Tensile tests were performed on specimens of different test section lengths oriented in the longitudinal, transverse, and through-thickness (PSL only) directions and size effect adjustment parameters were estimated. Statistical results indicate the existence of size effect in LVL and PSL for the longitudinal and transverse directions.
Download or read book NDS National Design Specification for Wood Construction written by American Wood Council and published by . This book was released on 2001 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 2015 Wood Design Package brings together all required elements for design of wood structures in one comprehensive document. It includes design information for wind and seismic conditions, sawn lumber, structural glued laminated timber, structural-use panels, shear walls and diaphragms, poles and piles, I-joists, structural composite lumber, structural connections (nails, bolts, screws), and cross-laminated timber.
Download or read book Proceedings of Structural Panels and Composite Lumber written by Timothy D. Faust and published by . This book was released on 1989* with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Torsional Shear Strength and Size Effect in Structural Composite Lumber written by Zhuo Yang and published by . This book was released on 2012 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: The natural variation of strength properties within brittle materials leads to size effect, a well-known phenomenon whereby the mean strength of a material is observed to decrease as the stressed volume increases. An important implication of size effect is that size adjustment parameters must be incorporated into multi-axial constitutive and failure models used in numerical simulations to predict material response to loading. This experimental study seeks to verify and quantify the presence of depth effect under shear failure in the orthotropic principal material directions of parallel strand lumber (PSL) and laminated veneer lumber (LVL). Torsion tests have been performed on specimens of fixed length and differing cross section to get a pure shear failure, by using a Universal Test Machine. The experimental results indicate that there is no depth effect for LVL from torsional shear stresses. PSL testing was limited to one size, and depth effect was not evaluated. A finite element model was built to simulate the torsional test for the 44x140mm LVL specimen. Comparing the experimental test results and the simulation results, the model provided an accurate prediction of the torsional test for Structural Composite Lumber.
Download or read book Simulation Based Modeling of the Elastic Properties of Structural Wood Based Composite Lumber written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
