Difference between engineering drawing and architectural drawing: Engineering drawing more structural, detailed, less aesthetic, many factors considered (safety)
Many different type of engineers
Communication between engineer and workers. Units used are standard. There’s no need to worry about language problems. (international projects) Check-up: pipes at right position etc.
Scaled model of structure produced from autoCAD. Draftsmen assist engineers in drawing engineering drawings. Engineers make the final decisions.
Structural concept, layout, dimension included in structural scheme Authorities check drawing (safety)
As built drawings drawn after construction is completed. It is one of the requirements for authorities to award CCC. In a building project, usually the archi is project manager, monitors whole project. For a bridge project, it’s the civil engineer.
Scale ruler used
Second form of dimensioning: Diameter and radii. For example, a hole.
Really vital. Things built in site MUST BE EXACT. Any miscalculations will have terrible consequences.
Roof plan (2D)
3d drawing of a building
Explains how do the views work
More detailed Plan view and side view
Perspective projection (more realistic) Parallel projection (looks into minute details)
Perspective rules are REALLY IMPORTANT
Contractors must be very careful in deciphering engineering drawings. If not, Clients unhappy. Waste of cost. Safety of building jeopardised etc.
Every single detail, including pipe, sockets n wires. Mistakes do happen. Do u know what happens when engineering drawings are not followed carefully?
Transcript of "Engineering Drawing"
Introduction to Drawing
( ITD – ARC30103 )
Lim Joe Onn
Pang Khai Shuen
A type of technical drawing that is
used to define requirements
for engineered items.
Construction Automobiles Electronics
Engineering drawings have specialized
drawings that apply to their respective fields:
The foundation comes from the geometrical
To archive the geometric form of the design.
To communicate ideas between designers and
To act as an analysing tool.
To stimulate the design.
To serve as a completing checker.
To support large number of perspective
Steps involved in
The difference in lines represent different
meanings in an engineering drawing.
Thick active lines
Thin active lines
Underground pipe lines
Engineering Drawings are always to scale.
Factors 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.
- Shows the
parts of the
- 2 mm away
There are multiple types of 2D Drawing Types in Structural
‘Top View’, ‘Floor Plan’ & ‘Roof Plan’
‘Cross-Section’ & ‘Longitudinal Section’
‘Front Elevation’, ‘Right Elevation’, ‘Left Elevation’ and
3-Dimensional engineering drawings
are also known as ‘Production
The 3-Dimensional (3D) Drawing Types:
- Orthogonal Projections
- Pictorial Drawing: Isometric & Oblique
- ‘’Working Drawings’’
To show the direction of
north relative to the plan.
To show the height of ceiling, etc
Orthographic projection drawings are used to
describe buildings, structures or objects pictorially.
Showed through first and third angle projection.
Graphical Projection drawings
have two different types:
1) Perspective projection
2) Parallel projection
Perspective Projective drawing is a linear projection
where three dimensional objects are projected on a
This has the effect that distant objects appear smaller
than nearer objects.
- One-point projection.
- Two-point projection.
- Three-point projection.
1. Select a view from the best position.
2. Observe the overall structure.
3. Note: parallelism, proportions and alignment.
Rules of Projection:
1. Parallel lines remain parallel.
2. Proportions remain unchanged.
3. Circles are always ellipses with the major axis of ellipse
perpendicular to the polar axis of circle.
4. Transformation of 90°angles.
OtherTypes of Projection
Symbols for Materials
Usually used in sectional views.
To show the materials of the
structure cut by the section plane.
• 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.
• Earle James H., (1991), Drafting Technology, Addison-Wesley
• Elsheikh Ahmed (1995), An Introduction to Drawing for Civil Engineers, McGraw-
• 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.
• ‘’ 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!