1. Isometric
With
Overhang
Lesson 2
J. Byrne 2013

2. Over hang
When the top of an item of furniture protrudes more than the sides, front or back, this is called the overhang.
In isometric drawing the overhang hides part of the top rails etc. which in turn shortens the height of the drawing.
The rest of the drawing remains un affected.
A rail that measures 70mm in Elevation will be less in Isometric
J. Byrne 2013

3. Top rail on a Table
ELEVATION
ISOMETRIC
J. Byrne 2013

4. Starting an Isometric Table Top overhangs by 40mm all around
Black line is overall size
Red line is stepped in the distance of the overhang in this case 40mm all around.
Blue line is the outside of your legs.
This measurement never changes
J. Byrne 2013

5. Starting an Isometric Dotted line shows overall size
Note legs should not touch this line
Top most rails appear narrower
Red line represents mm all around overhang
Measure from where you can see
Eg. The bottom to the underneath part of the top rail
This measurement never changes
J. Byrne 2013

6. Different Overhangs
When there is the same size overhang at the front and sides the front corner will always be on the original line of the box.
If there is a difference then the leg or carcase side will not be on the original line of the box.
J. Byrne 2013

7. Full picture
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8. Chamfer on a top
Draw a line on the edge of the top the same as you would on a solid piece of wood.
Next draw a line on the top surface of the top the same as you would on a solid piece of wood.
J. Byrne 2013

9. Chamfer on a top Rub out the original corner lines
Same as you would plane the corners on a solid piece of wood.
Join up the corners and drawing is finished
J. Byrne 2013

10. Moulding on a top
Repeat steps as before then draw a freehand curved line on the edge of the top.
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11. Tapering a leg
Draw a line on the leg to mark the taper the same as you would on a solid piece of wood.
Draw a second line on the leg to mark the taper on the other side the same as you would on a solid piece of wood.
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12. Tapering a leg
Draw in the finished lines.
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13. Tapering a leg
Draw in the size of the taper at the bottom of the leg and bring the lines up to were the taper starts.
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14. Leg tapered on four sides
Draw in the size of the taper at the bottom of the leg and bring the lines up to were the taper starts.
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15. Draw in overall sizes of orthographic and produce Isometric box to same sizes
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16. Draw in Top
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17. Draw in Over Hang
40 mm over hang all around
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18. Draw in two outer corners of legs
Check back with Elevation and End View to check lengths & widths
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19. Draw in Legs
Legs are 50mm x 50mm
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20. Draw in Rail Measure from bottom to underneath the rail Rail is 80mm
J. Byrne 2013