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Unit 1004 Produce basic woodworking joints © Pearson Education 2010 Printing and photocopying permitted Learning Outcome 4 Know about selecting materials
Unit 1004 Produce basic woodworking joints © Pearson Education 2010 Printing and photocopying permitted Timber conversion Conversion is sawing of a log into boards or planks. There are four main methods of conversion: ●Through and through ●Tangential ●Quarter ●Boxed heart
Unit 1004 Produce basic woodworking joints © Pearson Education 2010 Printing and photocopying permitted Timber conversion: Through and through and tangential Through and through – simplest and most economical; board prone to shrinkage and distortion Tangential – used for floor joists and beams as it is very strong
Unit 1004 Produce basic woodworking joints © Pearson Education 2010 Printing and photocopying permitted Timber conversion: Quarter sawn and boxed heart Quarter sawn – best quality timber but most expensive Boxed heart – radial sawing used when the heart of the tree is rotten
Unit 1004 Produce basic woodworking joints © Pearson Education 2010 Printing and photocopying permitted Seasoning of timber Timber from newly felled trees has a high proportion of moisture. This must be removed. The main reasons for seasoning are: ●Make sure shrinkage happens before timber is used ●Make sure moisture content is below 20% ●Dry timber is stronger ●Dry timber is less likely split or distort
Unit 1004 Produce basic woodworking joints © Pearson Education 2010 Printing and photocopying permitted Kiln seasoning For kiln drying: ●Air circulation supplied by fans ●Heat supplied by heating coils ●Humidity raised by steam sprays How is a progressive kiln different? What other method can be used?
Unit 1004 Produce basic woodworking joints © Pearson Education 2010 Printing and photocopying permitted Classifying and identifying timber Timber is either: ●Hardwood ●Softwood This refers to botanical differences and not the strength of the timber. To identify timber it is useful to have a personal collection of small samples. How many types of timber do you know? Research what each is used for.
Unit 1004 Produce basic woodworking joints © Pearson Education 2010 Printing and photocopying permitted Manufactured boards Most common manufactured boards are: ●Plywood – thin layers of timber (veneers) glued together and graded by type of glue ●Laminated boards – strips of wood laminated together and sandwiched between veneers ●Chipboard – compressed wood chips and flakes bonded with a synthetic resin glue ●Fibre board – pulped wood mixed with adhesives and pressed into sheets (hardboard, softboard, MDF)
-To identify different types of wood and their structure - To understand different types of defects in wood timber - To identify specific uses for different.
Timber Derivatives- Manufactured Boards
Man Made Board.
Processes Used to Form Wood Materials Chapter 16.
Conversion of Timber.
There is an enormous selection of different timbers available. This range can be split into two groups: Softwoods Hardwoods.
Chapter 15 Manufactured boards
Chapter 16 Processes Used to Form WoodMaterials. Objectives Two basic wood forming processes: bonding and bending. Composition boards: hardboard, insulation.
WOOD ACS-206 WEEK 6 UNIT 17 CE-ME-MECE-MSE. Categories of Wood There are mainly two categories of wood: 1. Hardwood 2. Softwood.
Chapter 8 Wood and Wood Products.
Sirodgze2010. HARDWOOD – ‘deciduous’ broad leaves ex: narra, yakal, kamagong oak, walnut, maple, etc. SOFTWOOD – ‘coniferous’ needle-like leaves ex:
Source Natural Origin Europe, Scandinavia Properties and features: Easy to work, relatively cheap, readily available. May contain knots, which weaken.
Lumber production and Types
UNIT 3 TECHNICAL MATERIALS WOODS. CLASSIFICATION WOODS NATURAL SOFTWOODS They come from coniferous trees. They are ever green, and have got NEEDLE shaped.
Course: Manufacturing II Unit: Material ID. Lumber is various lengths of wood used in the construction and furniture making trades.
Conversion of Timber. Trees are cut down during winter as there is less growth, therefore less sap After felling trees are transported to sawmills to.
Wood Technology. Structure and Growth Formed of long tubular fibers, about 1/25in in length in hardwoods and 1/8in for softwoods Annual rings- composed.
Wood Wood is one of the most adaptable and versatile of materials. It has been used in manufacture for thousands of years. Examples of wooden products.
CRAFT & DESIGN SOLID TIMBER Woods are classified into two main groups, softwoods and hardwoods. You should try to understand the main differences between.
1 Woods (RWTRM pages 46 – 54) Types of Materials Wood is a hard, tough substance that forms the trunks of trees. It has been used for thousands of years.
timber in internal applications Material Basics Timber and Wood Products Basic material properties and characteristics.
Woods and Processes Theory. Knowledge and Understanding.
Inside a tree bark sapwood heartwood
Cutting and shaping wood BDHS Plain-sawed or Plain sawn Lumber – most economical and least wasteful.
Manufactured Panel Products
Manufactured Boards J. Byrne 2013 Manmade Boards.
TECH 320 – Non-Metallic Processes Lumber Lecture Deacon Band.
Lumber Section II. Lumber Structural Strength Depends on species and grade, and the direction in which the load is acting with respect to grain of the.
Veneer and Laminates in Residential Construction Steve Kelly Advanced Diploma in Building Design(architectural) June 2009.
Chapter 2 Lumber.
© Boardworks Ltd of 22 Resistant Materials Woods These icons indicate that teacher’s notes or useful web addresses are available in the Notes Page.
Man Made Board Quiz.
Seasoning Seasoning is the reduction of the moisture content of wood.
Ch students per table 2.Workbook & Textbook 3.Pencil / Pen 4.Start when quiet.
Characteristics of timber - Relationship to properties
Lumber Wood. Tree Growth 1.Dead Bark – Protective Layer 2.Living Bark – Composed of hollow longitudinal cells that conduct nutrients down the truck.
WOODWORKING Technology Education Dept. Bellwood-Antis Middle School Mr. Mackereth.
Design and Nightingale Academy Wood and Joining Wood.
Learning Intention: Understand how trees are converted and why they need to be seasoned.
What you should know about Wood
Bending Projects Timber suitable for bending Timber should be free from knots, splits and shakes. Any flaw will cause weakness in the bend. Most timbers.
Timber BADI Year 1.
Lumber one of the World’s oldest construction material.
Mechanical Properties MAJOR PROPERTIES: 1.Strength 2.Stiffness Defects are not controllable in large sized pieces Full sized members are not homogenous.
WOOD! What is wood? An organic, natural composite of cellulose fibres A living structure combining strength & flexibility Contains WATER, even when dried,
Fundamentals of Building Construction, Materials & Methods, 5 th Edition Copyright © 2009 J. Iano. All rights reserved. 3 W OOD T REES.
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