1. 2. Reading and Interpreting Working Drawings
N4/5 Practical Woodworking Skills

2. Everything you need to know
Working drawings
Cutting lists
Orthographic projection
Scale
Line types:
outlines, centre lines, hidden detail and dimension lines
Reading and extracting information from working drawings
linear, radial, angular (45°) and diametric dimensions

3. Working drawings
Working drawings provide us with all of the information we require to create our models.
This includes:
The method of construction
How it goes together
Shape
The dimensions of the unit
The materials to be used
A cutting list
A working drawing for a shelving unit was produced. State two items of information a working drawing would show.

4. Cutting list
A cutting list gives you a lot of information about the materials you need for your project including:
Part name
Number of parts
Material
Length
Breadth
Thickness
Cutting List
Part
Number
Material
Length
Breadth
Thickness
Front Leg 2
Red Pine
300 40 30
Back Leg
Support
220
Rails 4
MDF 20
Complete the cutting list below, using the information provided in the
working drawings shown on page 14.
A cutting list was produced.
(i) State two pieces of information other than sizes that could be found in a cutting list.

5. Orthographic projection
The Third angle projection symbol shows that the drawing has been created using third angle projection.
This is where you have an elevation looking at the front of the model, an end elevation looking at the side and a plan looking at the top.

6. scale
1:2
1:1
2:1

7. Line types A thin continuous line is used for OUTLINES
A thin broken line which has a long then short dash shows CENTRE LINES
A thin broken line shows HIDDEN DETAIL
A line with arrows shows DIMENIONS. These are always read with the paper straight or from the right.

8. Extracting information
linear, angular (45°), radial and diametric dimensions