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Timbers - Coggle Diagram
Timbers
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Origin + Production
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Categorised in softwood, hardwoods and manufactured boards
Categories
Man-made
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Examples
Plywood
made by gluing at least three layers of sheet timber together at right angles to each other (lamination)
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Softwood
Take much less time to grow since they are made from coniferous trees (taking around 25 years to fully grow)
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Life cycle
Life cycle analysis needs to be considered by the designer, the manufacturer and the consumer to reduce negative impact on the environment
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Joints and Fixings
Frame joints
Dowelled
uses a wooden or plastic peg, called a dowel, which fits into aligned holes to reinforce the joint
Mortise and tenon
a very strong join cut with a tenon saw and mortise chisel – however, in production, a mortise machine may be used instead
Box joints
Dovetail
very strong and looks good but complex and difficult to cut, often in high quality furniture
Lap
stronger joint due to the surface area that can be glued, and a shoulder is cut from the edge one piece
Scales of production
One-off
Batch
Mass
Continuous
Production takes place 24 hours a day, 7 days a week for, most of the time, 365 days a year
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