Es 1 proj 2

ES1 PLATE NO. Edge View Drawing Shape of Planes
Isometric and True

ISOMETRIC DRAWING
 An isometric drawing or isometric
sketch is a drawing using the full length
measurement of the actual object.
However, in our case, the length of the
multiview projection of the object.

SECTION: THQR / THWX2 NAME: JUAN FIDEL B. CALAYWAN
SECTION: THRU2 NAME: MIKHAEL ANTHONY A. FELIPE GRADE: 17.1
GRADE: 10.0
1

Isometric and True

STEPS IN MAKING AN ISOMETRIC
DRAWING OF NORMAL SURFACES
 Given the multiview projection, draw
its corresponding isometric view.

GRADE: 10.0
2

Isometric and True

Before starting to create your
construction lines, imagine first the
figure or the object. In this case, the
object should look like this (cubes and
colors are used for better
3rd Level understanding).
2nd Level
1st Level
3rd Level
2nd Level

1st Level

GRADE: 10.0
3

Isometric and True

 Rectangular objects are easy to draw
using glass box construction, which
consists of imagining the object
enclosed in a rectangular box whose
sides coincide with the main faces of
the object.
 Lightly draw the overall dimensions
of the glass box.
30° 30°  The edges of the box should all
measure equal angles with each other.
In other words, the base edge of the
box should make 30° from the normal.

GRADE: 10.0
4

Isometric and True

 Draw the irregular features relative
to the sides of the box.

GRADE: 10.0
5

Isometric and True

 Darken the final lines.

GRADE: 10.0
6

Isometric and True

WITH HIDDEN SURFACES.
its corresponding isometric view. Note:
hidden lines only exist in the multiview
projection and not in an isometric view.

GRADE: 10.0
7

Isometric and True

 Your imagined object should look
something like this…

Removed block
produces hidden
Hidden line line PRP/HRP
Hidden line

Removed block
produces hidden
line FRP/HRP

GRADE: 10.0
8

Isometric and True

 Lightly draw the overall dimensions
of the glass box.

GRADE: 10.0
9

Isometric and True

 Locate main areas to be removed
from the overall block lightly sketch
along the main edges of the box to
define portion to be removed.

GRADE: 10.0
10

Isometric and True

 Lightly block in any remaining major
portions to be removed through the
whole block.
Lightly block in features to be
removed from the remaining shape
along the main edges of the box.

GRADE: 10.0
11

Isometric and True

 Darken final lines.

GRADE: 10.0
12

Isometric and True

ISOMETRIC DRAWING OF NORMAL
SURFACES: EXAMPLE ^_^
its corresponding isometric drawing.

GRADE: 10.0
13

Isometric and True

 Start with a glass box.

GRADE: 10.0
14

Isometric and True

 Locate the main areas to be
removed from the overall block.

GRADE: 10.0
15

Isometric and True

 Lightly sketch along the edges of the
box to define portion to be removed.

GRADE: 10.0
16

Isometric and True


GRADE: 10.0
17

Isometric and True

DRAWING OF INCLINED SURFACES
 Inclined surfaces appear twice in a
multiview projection.
its corresponding isometric view.

GRADE: 10.0
18

Isometric and True

(N)
 First step, try to imagine the object.
 Second step, label each plane as
(I) (I)
whether it is normal (N) or inclined (I).
This will aid you in imagining the
object.
(N) (N)
(I)
(N)
(N)

GRADE: 10.0
19

Isometric and True

 After imagining the shape of the
object, start your construction with a
glass box with the dimensions given by
the multiview projection. (NOTE:
ALWAYS START WITH A GLASS BOX).

GRADE: 10.0
20

Isometric and True

nonisometric WITH HIDDEN SURFACES.
 Lightly sketch the irregular features
relative to the sides of the box. Take
note of the type of surface (inclined or
normal). Also remember that
nonisometric lines will not be true
length in the isometric drawing (DO
NOT DIRECTLY TRANSFER THE DISTANCE
OF THE NONISOMETRIC LINE FROM
THE MULTIVIEW TO THE ISOMETRIC).

GRADE: 10.0
21

Isometric and True


GRADE: 10.0
22

Isometric and True

ISOMETRIC DRAWING OF INCLINED
its corresponding isometric projection.

GRADE: 10.0
23

Isometric and True

 Start with a glass box.
 Try to imagine the shape of the
object.

GRADE: 10.0
24

Isometric and True

Inclined surface
 Try to chop the object for better
understanding. Let’s first analyze the
Normal surface back part of the object.

Edge view of
the inclined
surface

GRADE: 10.0
25

Isometric and True

Inclined surface
 Locate areas to be removed.
 Lightly sketch the back part of the
object analyzed.

Normal surface

Edge view of
the inclined
surface

GRADE: 10.0
26

Isometric and True

 The back part of the object should
somehow look like this…

GRADE: 10.0
27

Isometric and True

Normal ISOMETRIC DRAWING OF INCLINED
 Next, analyze the middle part of the
Inclined
object.

Normal

Normal Normal -
blocked by the
inclined
Edge view of the
surface
inclined surface

GRADE: 10.0
28

Isometric and True

Normal Inclined  Locate areas to be removed.
 Lightly sketch the middle part of the
object analyzed (blue lines).

Inclined
Normal

Edge view of the Normal
inclined surface
GRADE: 10.0
29

Isometric and True

 After finishing the middle part, the
object should somehow look like this…

GRADE: 10.0
30

Isometric and True

Inclined  Afterwards, analyze the front part of
the object.

Normal

GRADE: 10.0
31

Isometric and True

 Locate areas to be removed.
 Lightly sketch the front part of the
Inclined object analyzed (blue lines).

Normal

Normal
Removed block

Removed block

GRADE: 10.0
32

Isometric and True

 After finishing the front part, the
object should somehow look like this…

GRADE: 10.0
33

Isometric and True

 Prefinalizing the shape of the
object….

GRADE: 10.0
34

Isometric and True

 Clear all main areas to be removed.

GRADE: 10.0
35

Isometric and True

DRAWING OF OBLIQUE SURFACES
 Oblique surfaces are the third type
of plane surface. They slant at an angle
to the front, top, and side projections.
Oblique surfaces appear as
foreshortened surfaces in all regular
views (meaning NOT IN TRUE LENGTH).
its corresponding isometric drawing.

GRADE: 10.0
36

Isometric and True

 Draw a glass box with dimensions
following that of the multiview
projection.

GRADE: 10.0
37

Isometric and True

Edge view of A DRAWING OF OBLIQUE SURFACES
 Surface “A” in the front view is a
horizontal edge-of-surface in the top
1 2 5
view. Locate “A” on the glass box.
6
8 3 4  Label the corners of the other
A surface 1 – 8 as shown. From the
7 shape, number of corners etc., surface
1 – 8 is also a surface in the top view.
 Label the common point 7 and 8 on
the glass box.

8

A

7

GRADE: 10.0
38

Isometric and True

5 6
1
2
4
 Locate corners 1 to 8 in the top view.
8
3
7
Placing point 1 or 8, or 6 or 7 in the top
1 2 5
view is a problem. Since these points all
6
8 3 4 project vertically, there are multiple
locations possible.
7  THE KEY TO LOCATING SOME
CORNERS OF OBLIQUE SURFACES IS TO
1 FIND ONE CORNER THAT IS KNOWN
2 FOR SURE.
 Here, corners 2 to 5 can be located.
8 Knowing these points will find 1. ie. 1
must connect to 2, 8 must connect to 1,
6 must connect to 5, etc.

7

GRADE: 10.0
39

Isometric and True

5 6
1
2
4
 Locate corners 1 to 8 in the side
8
3
7
view. Sketch the right side surface on
1 2
1 2 5
6 5 the glass box.
8 3 4 8 6  Locate points 6 and 5 as shown.
3 4

7 7

1
2

5
8
6

7

GRADE: 10.0
40

Isometric and True

5 6
1
2
4
 Sketch 1, 2, 3, 4, 5, 6, 7, 8 to 1 on the
8
3
7
glass box. The surface should have the
1 2
1 2 5
6 5 same shape, number of corners, and
8 3 4 8 6 parallel edges.
3 4

7 7

1
2

5
8
6
3
4

7

GRADE: 10.0
41

Isometric and True

5 6
1
2
4
 Complete all surfaces. Darken final
8
3
7
lines.
1 2 5 1 2
6 5
8 3 4 8 6
3 4

7 7

GRADE: 10.0
42

Isometric and True

Final Note: All solutions given are just guidelines or aid to help you in
understanding the concept of isometric drawing or, how to attack a
certain involving isometric drawings. In short, there are many other
ways in solving a problem involving isometric drawings. CORRECT
ISOMETRIC DRAWING DEPENDS ON A CORRECT IMAGINATION OF
THE OBJECT.

GRADE: 10.0
43

Es 1 proj 2

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