1. Hopper bevels
True Mitre angle
EDGE
True face angle
FACE
Hopper bevels are made up of Compound Mitres. These are angled on both the face and the edge of boards as in the hopper exercise used in this Presentation
Compound mitres are often used in Shop display fittings, to form sloping window beds and display units.
Some times the display item has more than four sides. This makes it a little more difficult, but setting out the angles uses the same theory.

2. 1. Identify the pivot point PIVOT POINT
Typical hopper shape
1. Identify the
pivot point
We establish a pivot point which is an edge upon which the angled side can pivot.

3. We lay a side down to get a view of it from above
PIVOT POINT
2. Lay down
the
side.

4. PIVOT POINT
2. Lay down
the
side.

5. PIVOT POINT
2. Lay down
the
side.

6. PIVOT POINT
2. Lay down
the
side.

7. PIVOT POINT
2. Lay down
the
side.

8. 3. Look from above to get the true shape
We look at it from above so we can project down and create a plan view or True Shape of the side
PIVOT POINT
3. Look
from
above
to get
the true
shape

9. 3. Look from above to get the true shape
We look at it from above so we can project down and create a plan view or True Shape of the side
3. Look
from
above
to get
the true
shape
True
Shape of
Side

10. Follow the steps in the next set of slides Print out the slide notes
pages first

11. First Draw an elevation and plan view of the hopper HEIGHT OFF SET
See your trainer for the sizes of the hopper. It will have a height and off set. The offset is the distance the hopper is tilted out or in.
If the corners on the hopper are all the same. When setting out for the angles and bevels you will only need to draw one corner. You need to get the the vertical height and off set correct.
The offset is the tilt in or out of the side.

12. 1. Extend the base line Extend the base line Pivot point
1. Extend the base line from the pivot point using a “T” square. Make sure it is long enough.

13. = thickness of side material
Pivot point
2. Set the
thickness
of the
material
2. Measure up from the base line the thickness of material and with a”T” square mark in the thickness of the material.

14. = thickness of side material2 1 2
= thickness of side material 1
Pivot point
3. Number
corners and
drop down
lines with
a compass
3. Number the corners. Then use a compass from the pivot point extended to point 1 to mark a curve down to the base line.
Keeping the compass point at the pivot point extend the compass to point 2 and mark a curved line down to the thickness of the base line.

15. = thickness of side material2 1 2
Join 1 to 2
= thickness of side material 1
Pivot point
4. Join points
1 & 2
From the base line join the new points 1 & 2

16. 5. Extend point 3 to the thickness line 2 1
Bring up point 3 to the thickness line 2
Join 1 to 2
= thickness of side material 3 1
Pivot point
5. Extend
point 3 to
the thickness
line
5. Using a compass again from the pivot point, extend it out to point 3
and rotate it up to the thickness line.
Note: be very careful, sometimes it can be difficult to locate the new point 3 accurately.

17. 6. Join Pivot Point to the new point 3 2 1
Join pivot point to new point 3 2
Join 1 to 2
= thickness of side material 3 1
Pivot point
6. Join Pivot
Point to the
new point 3
6. Join the pivot point to the new point three. This line should be parallel to the line 1,2.
If its not you will have trouble setting out the correct mitre angle

18. 7. Drop down the lines. Drop down lines 2 1 3 2 3 1 Pivot point
From the newly established points 1, 2 & 3 drop vertical lines down.
Drop down lines

19. 8. Extend the corners 1 to 1 2 to 2 3 to 3 2 1 3 2 3 PP hasn’t moved 1
Note all corners have been numbered 8.
2 to 2
3 to 3

20. 9. Join the points, a. 1 to 2 c. 3 to pivot point d. Pivot point to 1
PP hasn’t moved 1
9. Join the
points,
a. 1 to 2 1 1 2 2 3
b. 2 to 3
9. Join up the points 1 to 2, then 2 to 3, then 3 to the pivot point and finally from the pivot point back to the start at point 1.
c. 3 to pivot
point
d. Pivot point
to 1

21. 2 1 3 2 3
PP hasn’t moved 1
TRUE
FACE
ANGLE

22. 10. Overlay thickness of material across mitre 2 1 3 2
10. Overlay the true thickness of the material across the plan view of the mitre at 900 to the plan view of the mitre. You should have a slight rectangle NOT a square if you have been accurate.
true thickness of material

23. 11. Mark a diagonal to find the true mitre angle 2 1 3 2 1
Extend the lines to make it easier to set up a sliding bevel and get an accurate mitre angle.
true thickness of material

24. THE END