Published Date
Construction and Building Materials May 2012, Vol.30:447–454,doi:10.1016/j.conbuildmat.2011.12.027 Author
Mizi Fan,
Department of Civil Engineering, Brunel University, London UB8 3PH, UK
Received 12 August 2010. Revised 23 November 2011. Accepted 4 December 2011. Available online 3 January 2012.
Abstract A method has been developed and evaluated for determining the edgewise bending strength and modulus of elasticity of wood based panels by using semi-size test pieces without laminating the test pieces. The method has been employed to evaluate the edgewise bending performance of commercial particleboard (PB), oriented strand boards (OSBs), medium density fibreboards (MDFs) and plywood (PW). The results showed that the developed method was able to generate correct bending failure modes, consistent and repeatable results. Both the strength and modulus of elasticity were dependent on the depth of test pieces: the modulus of elasticity polynomially increased by about 44%, 56%, 50% and 31% for MDF, OSB, PB and PW respectively over the depth increasing from 50 to 250 mm, and the strength by about 8% for PB and 14% for OSB over the depth increasing from 50 to 200 mm while the strength linearly decreased by about 18% for MDF and 22% for PW over the whole range of the depths tested. The optimum (reference) depth of 200 mm has been derived accompanying with corresponding depth factors for calibrating both the strength and modulus of elasticity tested with other depths between 50 and 250 mm. Three types of I-beams have been webbed with the OSB, together with type A of PW and hardboard webbed I-beam for comparison. Wood based panel webbed I-beams showed three main failure modes: shear/bending failure, delamination between flange and web, and buckling, depending on the types of I-beam configurations and web materials. The strength and stiffness were closely related to both I-beam types and web materials, with the type C being about 1.5 times that of type A for strength and about 1.2 times for stiffness, and the strength of HB:OSB:PW being 1.95:1.12:1.00 and the stiffness about 4.67:3.39:1.00. Excellent correlations between semi- and small-size edgewise bending tests have been established for both the strength and modulus of elasticity, with the edgewise bending strength from semi-size being about 25% lower than that from small-size tests while the modulus of elasticity 17% higher. Both strength and stiffness of large scale edgewise loaded OSB is higher than that tested as the web of I-beam components, although the strength showed the same trend of changes while the stiffness had an opposite trend of changes between edgewise loaded and I-beam tests. These have showed significant over- or under-estimations of material and component (e.g. I-beam) performance and inaccuracy of the replaced test methodologies (EN 789, EN 13879[9]and[10]) for edgewise bending properties of wood based panels. Highlights ► New technologies for determining the edgewise bending properties of WBP. ► Determination of the edgewise bending performance of commercial WBP. ► Correlation between I-beam geometry with performance and failure modes. ► Correlation between semi- and small-size edgewise bending and I-beam performance. ► Equations for deriving design values of edgewise loaded WBP.
Reproduce a centuries-old ogee moulding profile just as your ancestors did – or create a custom ogee profile for your next project. The expert instructions in this DVD will help you do both those things and more. Once you’ve used basic woodworking skills to make a wooden plane blank, planemaker Tod Herrli walks you step by step through the process of building a custom moulding plane.
Are looking to repair or copy a moulding
Want to design and create your own moulding plane
Desire to cut your own classic ogee mouldings
You’ll learn how to:
Design the ogee template
Transfer the template to the plane
Shape the sole using other moulding planes
Cut and refine the iron
And more!
About the Author Tod Herrli teaches and lectures on planemaking in workshops around the country, including at Mike Dunbar's The Windsor Institute and the Marc Adams School of Woodworking. He has appeared on the PBS television programs, "The Woodwright’s Shop" and "The American Woodshop", and has published articles in woodworking magazines.
For further information log on website :
https://videos.popularwoodworking.com/courses/making-a-custom-ogee-moulding-plane-with-tod-herrli
Many woodworkers have been searching for practical advice on choosing, refurbishing, tuning and using traditional joinery planes. Bill Anderson and Joshua Farnsworth offer the first comprehensive video about different types of traditional joinery planes. Filmed on location in Roy Underhill’s Woodwright’s School in Pittsboro, North Carolina, this video helps woodworkers of all skill levels learn:
About different types of wooden and metal joinery planes, including Rabbet Planes, Moving Fillister Planes, Shoulder Planes, Dado Planes, Router Planes, Tongue & Groove Planes, Plow Planes and Combination Planes
What to look for when searching for joinery planes
How to spot and fix common problems
How to refurbish and repair different wooden and metal joinery planes
How to sharpen skewed irons, straight irons and various nickers
How to adjust and use different types of joinery planes
How to use planes to make and refine grooves, dados, rabbets, tenons and other joints
With nearly five hours of instruction, this video is perhaps the most detailed and practical resource on joinery planes.
*Note: This is Part 1 of a 2-part video.
For further information log on website :
https://videos.popularwoodworking.com/courses/choosing-refurbishing-using-joinery-handplanes-with-bill-andersonpart-1
In this first segment of "Super-Tune a Handplane," Christopher Schwarz introduces the concept and benefits of fine-tuning an antique handplane to exceptionally high degree of precision. Schwarz then explains what kind of plane is a good candidate for this process.
For further information log on website :
https://videos.popularwoodworking.com/courses/choosing-a-plane-to-supertune-with-christopher-schwarz
While bench planes are the most fundamental handplanes in your shop, they also are the most vexing. Ask two woodworkers how to choose, set up and use your bench planes and you'll get three answers.
After years of historical research and practical bench experience, Editor Christopher Schwarz has found a way to simplify the convoluted bench plane system so you can think for yourself when it comes to these tools. After viewing this video you'll know how to select the right size plane for your work. You'll know how to sharpen and set it up so it does the job at hand. And you'll learn how to use the plane so you make perfectly flat and gleaming panels (with the minimum amount of effort).
This video doesn't simply spout off a new idiosyncratic way to work with bench planes. Instead Schwarz explains how all the systems work so you can immediately see their strengths and weaknesses and exploit them so you'll do better work.
"Handplane Basics" puts into practice all of the principles explained in the story "Bench Planes: The System of Three" in this issue of Woodworking Magazine and dives further into the topics of sharpening, setup and use. If you are confused or frustrated by your bench planes, this video is just the ticket.
