Engineering drawing

of 47 /47

Transcript of Engineering drawing

Page 1: Engineering  drawing

Introduction to Drawing


Engineering Drawings

Page 2: Engineering  drawing



Page 3: Engineering  drawing

Introduction A type of technical drawing that is used

to define requirements for engineered items.Such as...


ViewsDimensions Details

Used In: Construction Automobiles Electronics

Page 4: Engineering  drawing
Page 5: Engineering  drawing

Fields Engineering drawings have specialized

drawings that apply to their respective fields:

Machine Drawings Structural Drawings Electrical Drawings

Aeronautical Drawings Marine Drawings

Page 6: Engineering  drawing
Page 7: Engineering  drawing
Page 8: Engineering  drawing

FoundationThe foundation comes from the geometrical


Consists of: Plain Geometric Drawing

Solid GeometricDrawing

Page 9: Engineering  drawing

To archive the geometric form of the design. To communicate ideas between designers and

manufacturing personnel. To act as an analysing tool. To stimulate the design. To serve as a completing checker. To support large number of perspective



Page 10: Engineering  drawing

Thank You

Steps involved in producing Engineering Drawings

Page 11: Engineering  drawing

Steps: 1. Engineer receives architectural drawing.

2. Produces engineering sketch (AutoCAD drawing)

Page 12: Engineering  drawing

Steps: 3. Structural scheme produced.4. Approval of architect.5. Submit to authorities for approval.

Page 13: Engineering  drawing

Steps: 6. Proceed to construction.7. Amendments of construction

drawings.8. As-built drawings drawn.9. Certificate of Completion and

Compliance awarded.

Page 14: Engineering  drawing

Elements in Engineering Drawings

Page 15: Engineering  drawing

LinesThe difference in lines represent different

meanings in an engineering drawing.

Types: Construction LinesThick active linesThin active linesHidden linesCentre linesBreak linesUnderground pipe linesDimension lines

Page 16: Engineering  drawing
Page 17: Engineering  drawing

ScalesEngineering Drawings are always to scale.


Most Common Scales:

Page 18: Engineering  drawing

DimensionsFactors to take into consideration:method and line type that is used for dimensioning.

The linear dimension would be the overall, auxiliary depiction and the second form of dimensioning would be the diameter and radii of the structure.

A mixture of the two would depict the position of ‘The Hole’ in an engineering drawing.

Page 19: Engineering  drawing
Page 20: Engineering  drawing

- Shows the builder and others the required size for every parts of the building.

- Unbroken lines.

- 2 mm away from the object being dimensioned.

Page 21: Engineering  drawing

2-Dimensional (2D)There are multiple types of 2D Drawing Types in Structural Engineering.

- Plan: ‘Top View’, ‘Floor Plan’ & ‘Roof Plan’

- Sections: ‘Cross-Section’ & ‘Longitudinal Section’

- Elevations:‘Front Elevation’, ‘Right Elevation’, ‘Left Elevation’ and ‘Rear Elevation’

Page 22: Engineering  drawing
Page 23: Engineering  drawing

3-Dimensional (3D)3-Dimensional engineering drawings are also known as ‘Production Drawings’

The 3-Dimensional (3D) Drawing Types:

- Orthogonal Projections- Pictorial Drawing: Isometric & Oblique- ‘’Working Drawings’’

Page 24: Engineering  drawing
Page 25: Engineering  drawing

OrientationTo show the direction of

north relative to the plan.

Level MarksTo show the height of ceiling, etc

Page 26: Engineering  drawing
Page 27: Engineering  drawing

Projectionof Engineering


Page 28: Engineering  drawing

Orthographic Projection

Orthographic projection drawings are used to describe buildings, structures or objects pictorially.

Showed through first and third angle projection.

Page 29: Engineering  drawing
Page 30: Engineering  drawing
Page 31: Engineering  drawing
Page 32: Engineering  drawing

Graphical Projection

Graphical Projection drawings have two different types:

1) Perspective projection2) Parallel projection

Page 33: Engineering  drawing
Page 34: Engineering  drawing

Perspective ProjectionPerspective Projective drawing is a linear projection where three dimensional objects are projected on a picture plane.This has the effect that distant objects appear smaller than nearer objects.

Types: - One-point projection.- Two-point projection.- Three-point projection.

Page 35: Engineering  drawing
Page 36: Engineering  drawing

Methods & Rules of Projection

Method:1. Select a view from the best position.  2. Observe the overall structure.3. Note: parallelism, proportions and alignment.

Rules of Projection: 4. Parallel lines remain parallel.5. Proportions remain unchanged.6. Circles are always ellipses with the major axis of ellipse 

perpendicular to the polar axis of circle.7. Transformation of 90°angles.

Page 37: Engineering  drawing

Other Types of Projection


Page 38: Engineering  drawing
Page 39: Engineering  drawing

Symbols& Icons

Page 40: Engineering  drawing

Symbols for Materials

Usually used in sectional views.

To show the materials of the structure cut by the section plane.

Page 41: Engineering  drawing
Page 42: Engineering  drawing
Page 43: Engineering  drawing
Page 44: Engineering  drawing
Page 45: Engineering  drawing
Page 46: Engineering  drawing

• B.S. 1192 : Part 1,2,3,4,5 Construction Drawing Practice• Construction Unit (1998), Computer-Aided Design using MicroStation 95, Industrial

Centre, The Hong Kong Polytechnic University.• Dennis Neeley (1996), CAD and the Practise of Architecture, New York, N.Y.: J. Wiley• Earle James H., (1991), Drafting Technology, Addison-Wesley• Elsheikh Ahmed (1995), An Introduction to Drawing for Civil Engineers, McGraw-Hill• Jude D.V., (1983), Civil Engineering Drawing London ; New York : Granada• Muller Edward J (1996). Reading Architectural Working Drawing , Prentice Hall• Pickup F. & Parker M. A. (1970) Engineering Drawing with Worked Example London :

Hutchinson.• Ratensky A. (1983), Drawing and Model making, Whitney Library of Design• Thompson Arthur, (1993). An Introduction to Construction Drawing, London : E.

Arnold.• ‘’ Engineering Drawings – Sixth Edition’’ by A.W Boundy (604.2)• ‘’Introduction to Engineering Drawing – Second Edition’’ by Warren J. Luzadder & Jon

M. Duff ( 604.2)

Guarantee at least 70% referencing from books!


Page 47: Engineering  drawing

Thank You End.