 | Measuring and Scribing - Course: Manual Woodworking Techniques. Instruction Examples for Practical Vocational Training |
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Instruction Example 1.2.: Frame Timbers
Measuring and scribing of wide and narrow faces of frame timbers is to be practised.
Material
Cut and planed strips of hard- or softwood. Measures depend on the work order, e.g.: final sizes:
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thickness: |
24 |
mm |
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width: |
50 |
mm |
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1st length: |
1000 |
mm |
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2nd length: |
500 |
mm |
Tools/Measuring and testing means
Folding rule, scriber, try square, marking gauge
Auxiliary accessories
Work bench or carpenter’s bench, screw clamp, pencil
Required previous knowledge
Use of measuring units, reading of drawings
Explanations to the working drawing
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(1) |
upright timbers |
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(2) |
crosspieces |
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j |
angle at the reference edge |
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d |
thickness |
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b |
width |
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l |
length |
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Sequence of operations |
Comments | |
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1. |
Prepare the working place. |
Check the tools. |
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2. |
Mark the reference edges. |
The best side of the timbers points inwards. |
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3. |
Draw the timbers together. |
Mistakes are avoided. |
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4. |
Parallel timbers are clamped together with a screw clamp. |
In this way uniform marking off of sizes is possible. |
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5. |
Mark the final length size and the finished dimensions with the try square and the scriber on the reference narrow face. |
Use the scriber only there where later chip-forming processes are carried out, otherwise use a sharp pencil. |
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6. |
Unclamp the timbers and transfer the marking onto the wide face by means of the scriber and the try square. |
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7. |
Set the marking gauge and scribe the finished dimensions. |
The finished dimensions depend on the type of wood joints. |
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8. |
Check all markings. |
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9. |
Compare with the drawing. |
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Figure
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